Senior Software Engineer (React)

🏢 Summary: Senior Software Engineer role focused on designing, developing, and maintaining scalable mobile applications using React Native in a cross-functional Agile environment. The position involves driving architectural decisions, ensuring code quality, and delivering reliable, high-performance solutions throughout the full software development lifecycle. Hybrid work model with strong emphasis on technical excellence and collaboration. 🗂️ Requirements: Strong commercial experience with React Native, Strong commercial experience with TypeScript, Strong commercial experience with Redux, Experience designing scalable and maintainable applications, Understanding of application architecture and state management, Experience with performance optimisation, Experience with automated testing using Jest, Experience integrating APIs, Experience with distributed systems, Knowledge of software engineering best practices, Experience working in Agile teams, Excellent English proficiency 📃 Skills: React, ReactNative, TypeScript, Redux, Jest, APIs, DistributedSystems, Architecture, Agile, Datadog, Braze, Terraform, Cloud 🏢 Description: Senior Software Engineer (React Native) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job? About the role We are looking for a Senior Software Engineer to join our engineering team. In this role, you will contribute to the design, development, and continuous improvement of high-quality software solutions, working closely with cross-functional teams to deliver value to our customers. As a senior member of the team, you will play an active role in technical discussions, support engineering best practices, and help drive the delivery of scalable and reliable products. You will collaborate with engineers, product managers, and stakeholders throughout the software development lifecycle, contributing to both technical excellence and team success. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Design, develop, and maintain high-quality software solutions that are scalable, reliable, and user-focused. Collaborate closely with Product Managers, Designers, and Engineers to understand requirements and deliver valuable features and enhancements. Contribute to technical discussions, solution design, and architectural decisions, helping to shape the future direction of the product. Write clean, maintainable, and well-tested code while promoting engineering best practices and quality standards. Support the delivery of features throughout the full software development lifecycle, from design and implementation to deployment and ongoing improvement. Identify opportunities to improve performance, stability, development processes, and overall product quality. Work collaboratively within a cross-functional team, sharing knowledge and supporting the growth and development of other engineers. Communicate effectively with stakeholders and team members, providing visibility of progress, challenges, and technical considerations. What you'll bring Strong commercial experience developing software applications using React Native, TypeScript, and Redux. Proven ability to design and build scalable, maintainable, and high-quality applications within complex engineering environments. Strong understanding of application architecture, state management, performance optimisation, and software design principles. Hands-on experience with automated testing using Jest and a commitment to delivering well-tested, reliable software. Experience integrating APIs and working with distributed systems and modern service-oriented architectures. Strong knowledge of software engineering best practices, including code quality, security, performance, and scalability. Excellent problem-solving and analytical skills, with the ability to make sound technical decisions and drive solutions independently. Strong communication and collaboration skills, with experience working effectively within Agile, cross-functional teams. Experience mentoring and supporting other engineers, contributing to knowledge sharing and continuous improvement across the team. Excellent command of English (written and spoken) Nice to Have Experience with Datadog, Braze, or Terraform. Exposure to cloud technologies and modern observability and monitoring practices.

🏢 Summary: Senior Backend Engineer role focused on designing and delivering secure, scalable authentication services within a distributed platform environment. The position involves working across the full software development lifecycle, contributing to architecture, DevOps practices, and production readiness. The engineer will build and maintain Java-based backend systems while supporting high engineering standards and mentoring team members. 🗂️ Requirements: Strong commercial experience in Java, Proven expertise with Spring and Spring Boot, Experience building scalable, secure backend systems in distributed environments, Hands-on experience with OAuth 2.0 and JWT, Experience designing and integrating APIs, Knowledge of clean code, testing, and code reviews, Experience with CI/CD pipelines and cloud-native development, Understanding of authentication and authorisation concepts, Ability to work in Agile and DevOps environments, Fluent English (written and spoken) 📃 Skills: Java, Spring, SpringBoot, OAuth2, JWT, API, CI/CD, DevOps, Agile, Cloud, Authentication, Authorization 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Java) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be part of a technology hub, working across the full software development lifecycle and contributing to the foundations of new platforms and capabilities. This role sits within a team responsible for authentication (AUTH) services across the group, playing a critical role in enabling secure, scalable, and reliable access to our products. As a Senior Software Engineer, you will work closely with your cross-functional team to design and implement new features and services, while bringing ideas, energy, and technical leadership to the table. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Design, build, and maintain secure, scalable backend services, taking solutions from concept through to production. Work closely with product, security, and engineering stakeholders to deliver high-value authentication and platform capabilities. Contribute to system and architecture design, participating in code and quality reviews to maintain high engineering standards. Apply DevOps and Agile practices, including automated testing, continuous integration, and frequent, reliable releases. Ensure services are production-ready through strong observability, monitoring, and operational support. Mentor and support other engineers, helping to build a collaborative and high-performing team. Continuously improve software quality and reliability through data-driven iteration, experimentation, and proactive problem-solving. What you'll bring Strong commercial experience in Java, with proven expertise in building production-grade backend systems using Spring / Spring Boot. Extensive experience designing and developing scalable, secure services in complex, distributed environments. Solid understanding of authentication and authorisation concepts, with hands-on experience using OAuth 2.0 and JWT. Experience working with APIs and integrating backend services within a wider platform ecosystem. Strong knowledge of software engineering best practices, including clean code, testing, and code reviews. Familiarity with DevOps and Agile ways of working, including CI/CD pipelines and cloud-native development. Ability to take technical ownership, collaborate effectively with cross-functional teams, and mentor other engineers. Excellent command of English (written and spoken) Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Senior Backend Engineer role focused on designing and delivering a greenfield Loyalty Platform using Java and Spring, working across the full software development lifecycle in a hybrid model. The position involves shaping backend architecture, building scalable distributed services, and ensuring production readiness in AWS environments. 🗂️ Requirements: Extensive experience in backend development with Java, Commercial experience with Kotlin, Strong knowledge of Spring framework, Experience designing scalable and maintainable distributed systems, Hands-on experience with AWS environments, Experience with automated testing and continuous integration, Ability to work in Agile cross-functional teams, Fluent English (written and spoken) 📃 Skills: Java, Kotlin, Spring, AWS, CI, Testing, Microservices, DistributedSystems, REST, Git 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Java/Kotlin) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be working across the full software development lifecycle and contributing to the design and delivery of a greenfield Loyalty Platform built using Java and the Spring ecosystem. In this role, you will help shape the core backend services that power our loyalty capabilities, working closely with product managers, engineers, and other stakeholders to turn ideas into scalable, high-quality solutions. You will be involved from early design and architectural decisions through to implementation and production readiness. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Build and evolve backend components that form the core of a new Loyalty Platform, using Java and Spring. Lead the delivery of backend solutions, contributing from early technical discovery through implementation and live operation. Work closely with product and engineering partners to shape requirements and turn them into robust, scalable services. Influence platform architecture and technical standards as the system is being designed and grown from the ground up. Maintain a strong focus on code quality, reliability, and performance through testing, reviews, and continuous refinement. Support modern delivery practices, including continuous integration, automated deployments, and iterative releases. Ensure services are resilient and operable in production, with appropriate logging, monitoring, and support processes in place. Act as a senior technical contributor within the team, sharing knowledge, supporting less experienced engineers, and raising the overall engineering bar. What you'll bring Extensive hands-on experience delivering backend solutions in Java, with exposure to Kotlin in commercial or production settings. Strong practical knowledge of the Spring framework, with the ability to apply common design patterns to solve complex engineering problems. Experience designing backend systems with scalability and maintainability in mind, including service-based and distributed architectures. Practical experience working in AWS environments, covering application deployment, configuration, and day-to-day operation. Familiarity with modern software delivery approaches, such as automated testing, continuous integration, and incremental releases. Confidence contributing to technical discussions and shaping implementation approaches, particularly in early-stage or greenfield projects. A pragmatic engineering mindset, balancing clean design with delivery, performance, and operational considerations. Strong collaboration skills and experience working within Agile, cross-disciplinary teams. Excellent command of English (written and spoken) Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Senior iOS Engineer role focused on designing, developing, and maintaining scalable, high-performance iOS applications using modern architectures and best practices. The position involves leading technical decisions, integrating backend services, and ensuring mobile app quality, security, and performance. Hybrid work model with one day per week in the Kraków office. 🗂️ Requirements: Extensive experience developing production-grade iOS applications, Expert knowledge of Swift, SwiftUI, UIKit, Xcode, Experience with scalable mobile architectures (TCA, Redux, MVI), Experience integrating RESTful APIs and GraphQL services, Knowledge of mobile security best practices, Knowledge of performance optimisation techniques, Experience with unit and UI testing, Experience with CI/CD pipelines and release management, Ability to lead code reviews and mentor developers, Fluent English (written and spoken) 📃 Skills: Swift, SwiftUI, UIKit, Xcode, TCA, Redux, MVI, REST, GraphQL, Kotlin, CI/CD, UnitTesting, UITesting, Security, Accessibility, PerformanceOptimisation 🏢 Description: Senior Software Engineer (iOS) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job? About the role We are going through an exciting period of change and are looking for a motivated Senior iOS Engineer to join our Engineering team. In this role, you will be responsible for designing, developing, and maintaining high-quality iOS applications, working closely with other engineers, product managers, and designers to deliver exceptional user experiences. You will work with modern technologies, while following best practices in mobile architecture, performance, and security. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Lead the design, development, and delivery of scalable, high-performance iOS applications using Swift, SwiftUI, and Xcode. Drive engineering best practices by promoting clean architecture, maintainable code, and robust testing strategies (e.g. TCA, modularisation, unit/UI testing). Collaborate cross-functionally with backend engineers, product managers, designers, and stakeholders to shape technical solutions and influence product direction. Architect and oversee integrations with shared Kotlin Multiplatform business logic, RESTful APIs, GraphQL services, SDKs, and third-party platforms, ensuring reliability and scalability. Champion mobile application security, accessibility compliance, performance optimisation, and overall app quality across the development lifecycle. Lead code reviews, mentoring, refactoring initiatives, and complex troubleshooting efforts to maintain a high-quality and sustainable codebase. Support and improve CI/CD pipelines, release management, and engineering workflows to increase delivery efficiency and product stability. Stay current with emerging iOS technologies, frameworks, and industry trends, proactively introducing improvements and sharing knowledge within the team. Mentor junior and mid-level developers, providing technical guidance, feedback, and support in their professional growth. Contribute to technical decision-making, architectural planning, and long-term mobile strategy within the engineering organisation. What you'll bring Extensive professional experience developing and delivering production-grade iOS applications. Expert knowledge of Swift, SwiftUI, UIKit, and Xcode ecosystem. Strong understanding of scalable mobile architectures such as The Composable Architecture (TCA), Redux-style patterns, or MVI. Proven experience integrating RESTful APIs, GraphQL services, SDKs, and third-party platforms. Strong knowledge of mobile security, performance optimisation, and accessibility best practices. Ability to lead technical discussions, mentor developers, and drive engineering best practices. Excellent problem-solving skills, attention to detail, and strong collaboration in cross-functional teams. Excellent command of English (written and spoken). Nice to have Experience with Kotlin Multiplatform or similar approaches to sharing business logic across mobile platforms.

🏢 Summary: Lead the frontend technical direction and delivery of a greenfield rewrite of a mission‑critical retail platform, collaborating closely with cross‑functional teams. The role combines hands‑on architecture, coding and mentoring while building a scalable, reliable system used in 24/7 store operations. Work in a hybrid model with strong ownership over frontend quality, performance and CI/CD practices. 🗂️ Requirements: Proven experience designing and delivering complex frontend solutions, Strong expertise in JavaScript and React, Experience with TypeScript, Experience with Node.js, Understanding of microservices architecture, Experience working with REST APIs and GraphQL, Hands-on experience with frontend testing frameworks, Experience building and maintaining CI/CD pipelines, Knowledge of web architecture and performance optimisation, Strong SQL skills, Fluent English (written and spoken) 📃 Skills: JavaScript, TypeScript, React, Node.js, Microservices, REST, GraphQL, JSON, Playwright, Jest, Cypress, CI/CD, SQL, AWS, Kafka, ATG, Remix 🏢 Description: Lead Software Engineer (Frontend) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 25,000 - 33,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job? About the role We are looking for an experienced Lead Software Engineer (Frontend) to join the Colleague Commerce team. This team builds tools used by store colleagues to handle customer orders, queries and in‑store online ordering. You will lead the technical delivery of a major rewrite of the DotCom Plus platform (currently ATG‑based): a greenfield rebuild that will selectively reuse existing components, with an initial rollout for B&Q and multi‑brand deployment planned from early 2027. The role combines hands‑on system design, technical leadership and close collaboration with product and operations to deliver a highly reliable, customer‑facing platform used in 24/7 store operations. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Lead system design and architecture for frontend and service interactions, ensuring solutions are scalable, maintainable and aligned with microservices principles Own technical direction for the squad: set standards, review designs, and drive decisions that balance short‑term delivery with long‑term maintainability Mentor and coach engineers, fostering growth, code quality and a culture of continuous improvement Collaborate cross‑functionally with backend engineers, product managers, designers and operations to define product vision and delivery plans Champion frontend quality: testing, performance, accessibility (WCAG) and reliable CI/CD pipelines Drive improvements in development lifecycle, observability, deployment practices and incident response for a mission‑critical system Represent the team to stakeholders, communicating technical trade‑offs, progress and risks clearly What you'll bring Proven experience designing and delivering complex frontend solutions and distributed systems Strong frontend expertise with JavaScript and React (TypeScript preferred) Experience with Node.js for backend or server‑side components Solid understanding of microservices architecture, REST APIs, JSON and GraphQL Hands‑on experience with frontend testing and automation (e.g., Playwright, Jest, Cypress) Experience building and maintaining CI/CD pipelines and deployment automation Good knowledge of web architecture, performance optimisation and web server technologies Strong SQL skills and familiarity with validating data flows across integrated systems Excellent communication and stakeholder management skills; able to influence technical strategy Excellent command of English (written and spoken) Nice to have Experience with AWS and cloud‑native patterns Familiarity with Kafka or event‑driven architectures Prior exposure to retail/e‑commerce platforms, especially ATG/DotCom ecosystems Experience with Remix or other modern frameworks and server‑side rendering patterns Background in observability, performance testing and reliability engineering

🏢 Summary: Senior Android Engineer role focused on developing and maintaining high-quality Android applications using Kotlin and Kotlin Multiplatform, contributing to a cross-platform mobile project. The position involves building shared KMP components, implementing modern UI with Jetpack Compose, and ensuring code quality through testing and best practices. Hybrid work model in Kraków with strong emphasis on clean architecture and scalable mobile solutions. 🗂️ Requirements: Minimum 5 years of experience in Android application development, Strong knowledge of Kotlin, Experience with Kotlin Multiplatform (KMP), Experience with architectural patterns: MVVM, MVP or MVI, Experience integrating RESTful APIs and GraphQL services, Knowledge of mobile application security best practices, Experience writing unit tests, Experience with Jetpack Compose, Experience with GitLab or similar version control systems, Ability to integrate web-views into native Android applications, Very good command of English (written and spoken) 📃 Skills: Kotlin, Android, KMP, Jetpack, Compose, MVVM, MVP, MVI, REST, GraphQL, GitLab, OOP, UnitTesting, WebView, Security 🏢 Description: More about this role Everything you need to know. Overview Senior Software Engineer (Android) (Hybrid/Kraków – 1 day per week in the office) We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in. At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation. We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you! At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements. In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self. We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 20,000 - 28,000 PLN gross per month on an employment contract Private medical healthcare at LUXMED (including dentalcare) for you and your family Medicover sports card (Fit&More package) Life insurance financed by the employer 30-minute lunch break included in the 8-hour working day Work in a highly professional and stimulating atmosphere Training & Buddy programme that will allow you to quickly adapt to your new role Wellbeing programme for employees Co-financing of monthly tickets for the public transport in Krakow Comfortable working environment in the office and the possibility of home office Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification Employee referral programme What's the job About the role We are going through an exciting period of change and are seeking a highly motivated and experienced Android Engineer with expertise in Kotlin, Android + Kotlin Multiplatform to join our Software Engineering team and work on KMP Mobile project. Our aspiration is to grow an engineering function that is world class, pioneering in the retail technology space, making great software within a growth culture that is always looking for the next thing to improve or adapt to meet our customer needs. If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you! Responsibilities Design, develop, and maintain high-quality Android applications Contribute clean code to our Android codebase Write KMP components to be shared across iOS and Android platforms Leverage Jetpack compose for building composable user interfaces Write unit tests to ensure the quality and reliability of the codebase Utilize GitLab for source control management and code reviews Manage platform dependencies and 3rd party integrations Ability to integrate web-views into native views where necessary Work with product managers and designers to understand user needs and implement effective user interfaces Keep up to date with the latest trends and best practices in Android development and share knowledge with the team What you'll bring At least 5 years of experience developing Android Apps Strong knowledge of Kotlin and object-oriented programming principles Experience with architectural design patterns such as MVVM, MVP, and MVI Understanding of RESTful APIs and web services integration and GraphQL services Knowledge of mobile app security best practices and how to implement them Some knowledge of Kotlin Multiplatform (KMP) Excellent command of English (written and spoken) Nice to have Published articles on LinkedIn/Medium or other platforms Involved in an Android community via membership of online groups or meetups and can demonstrate participation in developer forums Experimented with iOS development To get to know us better visit: LinkedIn Kingfisher plc Rewards & Benefits What we offer. Private Health Care Private medical healthcare at LUXMED (including dental care) for you and your family. Child Insurance InterRisk - insurance for children. Sports Card Medicover sports card (Fit&More package). Courses Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification. Life Assurance Life insurance at Generali financed by the employer. Bonus Opportunity to earn annual bonus that aligns to work level of role. Parking Parking spaces and LOTOS card. Kingfisher Pension Scheme Co-financing of monthly tickets. Transport Discount Co-financing of monthly tickets for the public transport in Krakow (50% discount).

🏢 Summary: Senior Frontend Engineer role focused on building and scaling AI-powered Next.js applications with complex state management, real-time interactions, and enterprise-grade frontend architecture. The position involves owning frontend delivery, designing intuitive AI user experiences, and optimizing performance, accessibility, and scalability for high-load products. Hybrid full-time B2B engagement with a competitive salary range. 🗂️ Requirements: 5+ years of frontend engineering experience, 3+ years of React and TypeScript experience, Production experience with Next.js SSR applications, Knowledge of SSR, SSG, CSR trade-offs, Experience with complex state management, Experience building AI/LLM interfaces, Experience optimizing Core Web Vitals and frontend performance, Knowledge of localization, accessibility, security, and compliance, Security-conscious engineering approach, Experience using AI coding agents, Strong communication skills 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, JavaScript, LLM, AI, CoreWebVitals, Accessibility, Security, Localization, SemanticSearch, GraphQL 🏢 Description: Senior Frontend Engineer (React) 💰 Salary: $8000-$12,000 🕦 Full-time ☑️ B2B 🌴 Hybrid We are looking for a Senior Frontend Engineer to join a fast-growing AI product company's engineering team. The role sits at the crossroads of frontend architecture and product experience, owning both the delivery of business-critical Next.js applications and the design of intuitive, trustworthy user experiences for agentic AI products. Requirements Over 5 years of frontend engineering experience, including 3+ years specializing in React and modern TypeScript. Production Next.js experience: SSR applications at scale, app router, server components, and the trade-offs between SSR, SSG, and CSR. Complex state management for hard scenarios: real-time collaboration, optimistic updates, multi-tenant isolation, large-scale data sync. Experience building AI/LLM interfaces: streaming token responses, chat UIs, semantic search, or similar real-time AI interactions. High-load performance work: you monitor Core Web Vitals and know how to improve them under heavy traffic and large datasets. Enterprise application depth: localization, accessibility, security, and compliance, you understand the complexity beyond "making it work". A security-conscious approach to engineering: you handle sensitive data carefully and think about the security implications of what you ship. Strong craft and product instinct: you don't wait for perfect designs, you spot UX issues and propose solutions, and you're never satisfied with "good enough". AI-native working style. You already use AI coding agents daily and are eager to push the boundaries of harness engineering. Clear communication. You articulate design decisions and technical trade-offs clearly, verbally and in writing. Key Responsibilities Design and ship production Next.js SSR applications with complex state, high-load scenarios, and real-time AI interactions at scale. Build interfaces for AI-powered features: streaming LLM responses, semantic search across millions of documents, interactive knowledge graphs, and agentic builders. Architect component libraries and maintain the design system, ensuring reusability, accessibility, and consistent UX across the platform. Deliver enterprise-grade functionality: localization, accessibility compliance, cross-browser support, and security. Take full ownership after launch: monitor performance in production, optimize bundle sizes, instrument for Core Web Vitals, and ensure things scale gracefully. Keep the bar high on code quality, testing, and craft through thoughtful code review and mentorship.

🏢 Summary: Senior Front-End Engineer role focused on building scalable, responsive enterprise web applications using React and modern front-end technologies. The position involves collaborating with UX, product, and backend teams, leading front-end architecture decisions, optimizing performance, and mentoring engineers in an Agile environment. Hybrid work near Fort Lauderdale, FL with emphasis on clean architecture, reusable UI systems, and enterprise-grade user experiences. 🗂️ Requirements: 8+ years developing enterprise front-end applications, 3+ years advanced React.js experience, Proficiency in JavaScript, HTML5, CSS3, Experience with responsive CSS frameworks, Knowledge of component-driven architecture and scalable front-end design, Experience with wireframes, prototypes, and UI design tools, Front-end performance optimization experience, Proficiency with Git and version control workflows, Knowledge of code reviews, testing, debugging, and maintainable architecture, Ability to work in Agile/Scrum environments, Authorization to work in the U.S., Residence in Florida 📃 Skills: React, JavaScript, HTML5, CSS3, Redux, Zustand, Tailwind, Bootstrap, MaterialUI, Figma, AdobeXD, Sketch, Git, Next.js, TypeScript, Jest 🏢 Description: About the Role The Senior Front-End Engineer role is an opportunity to build modern, responsive web applications that deliver exceptional user experiences for enterprise customers. You'll collaborate with designers, product leaders, and backend engineers to transform ideas into intuitive, scalable interfaces while influencing both technical direction and user experience. This position is ideal for someone who enjoys owning the front-end architecture, mentoring teammates, and delivering polished applications that perform at scale. What You'll Do - Design and develop modern, responsive web applications using React and contemporary front-end development practices. - Partner closely with UX designers, product managers, and backend engineers to translate business requirements into intuitive user interfaces. - Convert wireframes, prototypes, and visual concepts into clean, maintainable, production-ready code. - Build reusable UI components and scalable design patterns that promote consistency across applications. - Champion performance optimization techniques to ensure fast, responsive, and reliable user experiences. - Create interfaces that are accessible, responsive, and compatible across modern browsers and devices. - Participate throughout the full front-end development lifecycle, from solution design through deployment and ongoing enhancements. - Conduct peer code reviews, share technical knowledge, and mentor junior engineers on development standards and best practices. - Promote clean architecture, automated testing, maintainable code, and continuous improvement within the engineering team. - Collaborate in Agile ceremonies and contribute to technical planning, estimation, and solution design. What You'll Bring - 8+ years of professional experience developing enterprise front-end applications. - 3+ years advanced expertise with React.js, including functional components, Hooks, Context API, and modern state management approaches such as Redux/Zustand. - 2–3+ years of hands-on involvement with UI/UX design, user-centered design principles, or close collaboration with design teams. - Strong proficiency with JavaScript (ES6+), HTML5, CSS3, responsive layouts, and modern browser capabilities. - Experience developing responsive interfaces using CSS frameworks such as Tailwind CSS, Bootstrap, or Material UI. - Solid understanding of component-driven architecture, reusable design systems, and scalable front-end application design. - Experience creating or working from wireframes, prototypes, mockups, and interactive designs using tools such as Figma, Adobe XD, or Sketch. - Strong knowledge of UI design fundamentals, including typography, spacing, color theory, layout, and usability. - Experience optimizing front-end performance through techniques such as lazy loading, code splitting, rendering optimization, and efficient state management. - Proficiency with Git, collaborative version control workflows, and modern software development practices. - Strong understanding of software quality practices, including code reviews, debugging, testing, and maintainable application architecture. - Excellent communication skills with the ability to collaborate effectively across engineering, product, and design teams. Nice to Have - Experience with Next.js and server-side rendering. - Working knowledge of TypeScript. - Familiarity with WCAG accessibility standards and inclusive design practices. - Experience with automated testing frameworks such as Jest and React Testing Library. - Experience working within Agile/Scrum delivery environments. - Previous experience mentoring developers or serving as a technical lead on front-end initiatives. Location - Hybrid role: 3 days onsite and 2 days remote near Fort Lauderdale, FL. - Applicants must be authorized to work for any employer in the U.S. - Candidates must reside in Florida. Compensation and Benefits - Estimated compensation range: $40–$50 USD. - Eligible for discretionary bonuses, commissions, and incentive programs. - Comprehensive benefits package including medical, dental, vision, 401(k), and paid time off. ADA Specifications - Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.

🏢 Summary: Senior Frontend Engineer role focused on building and enhancing scalable web applications for a global e-commerce platform. The position involves designing high-quality, responsive user interfaces, optimizing performance, and contributing to frontend architecture using modern React and TypeScript ecosystems. You will collaborate with cross-functional teams to deliver robust, reusable, and maintainable frontend solutions. 🗂️ Requirements: Degree in Computer Science or equivalent experience, 4+ years of software engineering experience, Commercial experience in building production web applications, Strong proficiency in TypeScript including generics and strict mode, Expertise in React ecosystem including React 19 and React Router, Experience with modern bundlers, Experience with micro-frontend architecture and Module Federation, Experience with state management libraries, Experience with data-fetching libraries, Experience with unit and E2E testing, Experience publishing internal packages and Semantic Versioning, Experience with CI/CD pipelines and release workflows, Understanding of cloud computing principles, Experience with SQL and relational databases, Knowledge of API design and distributed applications 📃 Skills: JavaScript, TypeScript, React, ReactRouter, Rsbuild, Webpack, Vite, ModuleFederation, Zustand, TanStackQuery, RxJS, HeroUI, Tailwind, Jest, TestingLibrary, Playwright, Azure, Kubernetes, AzureDevOps, GitHubActions, Jenkins, SQL, MySQL, PostgreSQL 🏢 Description: Position: Senior Frontend Engineer Type of contract: COE (UoP) up to 22 700 PLN gross/month Working model: fully remote You can join our client and work on a modern digital platform designed to better connect shoppers and retailers within the global e-commerce ecosystem. The project focuses on building and enhancing scalable web applications and core services that power user interactions. You’ll collaborate closely with product and design teams to deliver intuitive, high-performance user experiences. The environment emphasizes innovation, usability, and continuous improvement of frontend architecture. Role summary: As a Senior Engineer, you will take ownership of designing and developing responsive, high-quality user interfaces while collaborating with cross-functional teams. The role involves translating UI/UX designs into functional applications, improving performance, and ensuring consistency through reusable components. You’ll also contribute to code quality through reviews and support architectural decisions. The position requires strong expertise in modern frontend technologies, especially React and TypeScript, along with experience in scalable application development. Responsibilities: Design and develop modern, responsive user interfaces Collaborate with designers, backend engineers, and DevOps teams Review code and maintain high engineering standards Build reusable UI components and optimize performance Ensure cross-browser compatibility and accessibility Key requirements: Degree in Computer Science (or equivalent experience) 4+ years of experience in software engineering Hands-on experience in writing production code for web applications; Practical knowledge in front-end technologies such as JavaScript, TypeScript, CSS, HTML, with strong proficiency in TypeScript (generics, type-safe APIs, strict mode); Expertise in the React ecosystem including React 19, React Router, modern bundlers (Rsbuild/Webpack/Vite), and micro-frontend architectures (Module Federation); Experience with state management and data-fetching libraries such as Zustand, TanStack React Query, and reactive patterns with RxJS; Familiarity with modern component libraries and styling toolchains-  HeroUI, Tailwind CSS, design-token-driven theming; Experience with unit and E2E testing frameworks such as Jest, Testing Library, and Playwright; Experience working with internal packages and publishing them to a private registry and Semantic Versioning; Familiarity with CI/CD pipelines and release workflows- Azure DevOps, GitHub Actions, or Jenkins- including PR validation, artifact promotion, and multi-environment deploys; An understanding of cloud computing principles and practices; experience with production applications in cloud environments. Azure and Kubernetes experience is preferred; Knowledge in key programming concepts like memory management, optimization techniques, API design, relational mapping frameworks, and distributed applications; An understanding of database concepts and experience writing SQL in a relational database such as MySQL or PostgreSQL; Familiarity with monitoring and logging solutions; Self-starter who can move projects forward by filling in the gaps on Agile teams, from delivering complete, well-defined functionalities with high quality standards, through reviewing other Engineers’ code to contributing to design sessions. Offer: COE, up to 22 700 PLN gross per month Private healthcare, life insurance, sports card, and lunch subsidy Learning and development support (including tuition assistance) Employee Assistance Program Remote or hybrid work model supporting work–life balance Opportunity to collaborate with experienced engineers on global-scale e-commerce solutions

🏢 Summary: Senior Frontend Engineer role focused on leading development of a high-traffic web application for shipping management and rate comparison. The position involves end-to-end frontend ownership, from translating designs into production-ready interfaces to optimizing performance and accessibility. You will shape architecture decisions and maintain standards within a React/TypeScript monorepo environment. 🗂️ Requirements: 8+ years of production frontend development experience, 3+ years in senior role within scale-up or start-up environment, Deep expertise in React and TypeScript, Strong knowledge of state management and component architecture, Proficiency in HTML semantics and modern CSS, Experience with web performance optimization and Core Web Vitals, Practical expertise in WCAG 2.2 AA accessibility standards, Experience with unit, integration, and end-to-end testing, Experience working with monorepos, Ability to contribute to frontend and API architecture decisions 📃 Skills: React, TypeScript, JavaScript, HTML, CSS, Grid, Flexbox, WCAG, CoreWebVitals, Testing, Monorepo, API, AWS, Snowflake, Figma 🏢 Description: Senior Frontend Engineer Our Client is an ambitious tech company on a mission to create a frictionless shipping experience for SMEs. They wrap real-time pricing, comparison, booking, and tracking into a clean and unified interface, replacing outdated logistics processes with a seamless digital platform. Role We are looking for an experienced Senior Frontend Engineer to play a central role in shaping a web app where thousands of customers every week sign up, compare rates, manage integrations, and book shipments. You will work end-to-end—from understanding customer problems to shipping production code—while leading frontend work on a core value team (Customer Experience, Marketplace, or SaaS). Responsibilities Plan and lead frontend development within your value team, collaborating closely with PMs, designers, and backend engineers. Translate designs into production user interfaces that are accessible, performant, well-tested, and consistent with the rest of the product. Build prototypes to put working code in front of customers when validating product ideas. Own web performance on the surfaces you touch, ensuring excellent Core Web Vitals to boost conversion rates. Champion accessibility across the platform (WCAG 2.2 AA is the baseline). Contribute to architecture decisions that cross the frontend/backend line, including API boundaries and real-time updates. Maintain shared standards across a React/TypeScript monorepo through code reviews and technical councils. Mentor junior engineers and contribute to the evolution of the company's design system. Key competences 8+ years of experience writing production frontend code, with the last 3+ at a senior level in a scale-up/start-up environment. Deep React and TypeScript experience, with strong opinions on state management and component architecture. Solid web fundamentals: HTML semantics, modern CSS (Grid, Flexbox, container queries), browser rendering pipelines, and the network layer. Accessibility expertise as a practitioner skill, capable of spotting WCAG issues during design reviews. Fluency in web performance, measuring and optimizing Core Web Vitals on real products. High testing maturity (unit, integration, and end-to-end tests). Excellent written and spoken English communication skills. Bonus points for: Experience with large-scale monorepos, background in logistics/marketplaces/B2B SaaS, contributing to design systems, embedding AI-assisted features, or a working knowledge of Go. Salary and Conditions Salary up to 7000 Euro per month 100% remote from Poland B2B contract signed directly with our Client Start ASAP Benefits Work with a modern tech stack (React, TypeScript, AWS, Snowflake, Figma, Claude Code, etc.) A curious, collaborative, low-ego culture within a Great Place to Work certified environment