Senior React Developer

🏢 Summary: Senior React Developer role focused on building and maintaining modern, scalable web applications in a large international banking environment. The position involves developing high-quality, responsive frontend solutions, ensuring code quality, and supporting production systems within an Agile team. Long-term B2B contract with hybrid work model in Kraków. 🗂️ Requirements: Proven experience delivering web applications, Strong experience building rich frontend/UI layers, Excellent knowledge of React.js, Excellent knowledge of JavaScript, Excellent knowledge of TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with CSS preprocessors (SASS or Less), Experience with Jest, Experience with React Testing Library, Experience creating pixel-perfect UI from detailed specifications, Experience designing responsive interfaces for desktop and mobile, Understanding of accessibility standards, Understanding of cross-browser compatibility, Knowledge of JSON, Knowledge of XML 📃 Skills: React, JavaScript, TypeScript, HTML5, CSS3, SASS, Less, Jest, ReactTestingLibrary, JSON, XML 🏢 Description: Location: Kraków, Poland Work model: Hybrid, 6 days per month in the Kraków office Recruitment process: Test + 1-hour live coding interview in React Contract : B2B, long-term About the role We are looking for a Senior React Developer to join the Business Services Digital team . The team delivers IT solutions and support for Business Services within a large-scale, international banking environment. This is a great opportunity for an experienced frontend engineer who enjoys building high-quality digital products, working in Agile teams, and contributing to modern, scalable web applications in a complex enterprise setting. Your responsibilities Design, develop, test, and implement modern web-based applications Build rich, responsive, and pixel-perfect user interfaces using React Maintain a delivery-oriented approach across application development and supporting software/data infrastructure Manage software releases and support existing systems in production Ensure code quality, maintainability, and full test coverage Contribute to and promote frontend best practices and engineering standards Mentor other team members through knowledge sharing and technical guidance Deliver solutions on time and within budget Follow internal development methodologies, security standards, and documentation requirements Drive productivity and quality improvement initiatives Coordinate releases through to Production Required experience Proven track record in delivering web applications Strong experience building rich frontend/UI layers Excellent knowledge of React.js Excellent knowledge of JavaScript and TypeScript Strong knowledge of HTML5 , CSS3 , and CSS preprocessors such as SASS or Less Experience with frontend testing frameworks such as Jest and React Testing Library Experience creating pixel-perfect UI based on detailed specifications Experience designing responsive interfaces for desktop and mobile applications Good understanding of accessibility and cross-browser compatibility Good knowledge of data marshalling/de-marshalling using JSON and XML Nice to have Experience working with Git Familiarity with IntelliJ and VS Code Good understanding of responsive web techniques Knowledge of Node.js / Express Experience designing digital products in the onboarding or banking domain What makes this opportunity interesting Work on impactful digital solutions in a global banking environment Join a mature engineering team focused on quality, delivery, and best practices Contribute to modern frontend development using React and TypeScript Competitive B2B rate

🏢 Summary: Full Stack Engineer role in the banking industry focused on building and delivering high-quality solutions within a microservices architecture. The position involves hands-on backend and API development, frequent production deployments, and collaboration with global teams to promote strong engineering practices. Hybrid work model with long-term B2B contract and technical recruitment process including live coding. 🗂️ Requirements: Strong experience in backend application design, development, and deployment, Experience delivering code in microservices architecture, Experience deploying changes to production frequently, Experience developing and deploying RESTful APIs, Experience writing schemas and working with PostgreSQL databases, Fluent English for project communication 📃 Skills: Java, REST, PostgreSQL, Docker, Kubernetes, GCP, ReactJS, Microservices 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Full Stack Engineer role in the banking sector focused on building and deploying high-quality solutions within a microservices architecture. The position involves hands-on backend development, frequent production releases, and collaboration within a global team. The contract is long-term B2B with a hybrid work model. 🗂️ Requirements: Strong software engineering experience, Backend application design and development expertise, Experience with microservices architecture, Experience delivering code to production frequently, Experience developing and deploying RESTful APIs, Experience with PostgreSQL and schema design, Fluent English for technical communication 📃 Skills: Java, REST, PostgreSQL, Microservices, Docker, Kubernetes, GCP, ReactJS 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Full Stack Engineer role focused on building and delivering high-quality backend solutions within a microservices architecture in the banking domain. The position involves hands-on development, frequent production deployments, and collaboration within a global team to support scalable systems. The engineer will design, develop, and maintain RESTful services and ensure alignment with engineering best practices. 🗂️ Requirements: Strong experience in backend application design, development, and deployment, Experience delivering solutions in microservices architecture, Experience developing and deploying RESTful APIs, Experience working with PostgreSQL databases and writing schemas, Ability to deliver changes to production frequently 📃 Skills: Microservices, REST, PostgreSQL, Backend, APIs, Deployment 🏢 Description: 🌍 Work mode: hybrid – 6 days per month in the Kraków office (days of your choice, including the option to attend all 6 days in a row). ⏰Start: ASAP/1 month. 📝Contract: B2B. ⚙️Recruitment process: 2 meetings; live coding, technical interview. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. Summary: This full stack engineer role focuses on delivering high-quality code through a microservices architecture while promoting engineering best practices within the team. Main Responsibilities: Be hands-on, delivering code to production, supporting the architecture and design aligned to a microservice structure. Maintain awareness of business, engineering, and non-functional requirements to support company growth. Drive a positive engineering culture across teams. Collaborate with a global team across regional boundaries. Proactively remove impediments, address risks, and communicate issues to program management. Identify process inefficiencies and find innovative solutions to eliminate them. Key Requirements: Strong experience in software engineering with proven expertise in backend application design, development, and deployment. Experience with delivering code in a microservice architecture. Demonstrated ability to deliver changes to production frequently. Experience in developing and deploying RESTful APIs. Prior experience writing schemas for and working with PostgreSQL databases. Nice to Have: Experience with Java, preferably recent versions. Understanding of containerization and orchestration technologies like Docker/Kubernetes and GCP Cloud platform. Experience in developing UI applications using ReactJS. Previous experience in the financial sector, specifically banking. Other Details: Team Structure: Global team collaboration across regions. Project Context: Focus on microservices and engineering culture.

🏢 Summary: Senior Front-end Developer role focused on designing and implementing complex user interfaces and single-page applications using modern frontend technologies. The position involves architecting scalable frontend solutions, optimizing performance, and integrating APIs in collaboration with backend and product teams. Hybrid work model with B2B contract in the banking sector. 🗂️ Requirements: Proficiency in HTML, Proficiency in CSS, Proficiency in JavaScript, Proficiency in TypeScript, Experience with Web Components, Experience with Lit, Strong knowledge of Node.js, Experience with npm, Familiarity with Vitest, Experience building single-page applications, Experience integrating REST APIs, Ability to optimize frontend performance 📃 Skills: HTML, CSS, JavaScript, TypeScript, WebComponents, Lit, Nodejs, npm, Vitest 🏢 Description: Industry: Banking Work model: Hybrid in Warsaw, Łódź or Tricity - 3 days a week in the office Rate: up to 150 PLN/h (B2B contract) Introduction & Summary We are seeking a highly skilled Senior Front-end Developer proficient in modern frontend technologies to design and implement complex user interfaces. The ideal candidate should possess extensive experience with HTML, CSS, JavaScript, and TypeScript , alongside capabilities in Web Components. Exceptional collaboration skills are essential as the role involves working closely with various teams to enhance product offerings. Main Responsibilities Architect and implement interactive user interfaces and single-page applications. Establish best practices for application architecture and component reusability. Audit and enhance frontend performance and load times. Collaborate with backend engineers and product teams to integrate APIs. Ensure optimal user experiences across multiple devices. Key Requirements Proficiency in HTML, CSS, JavaScript, TypeScript . Experience with Web Components / Lit . Strong background in Node.js / npm . Familiarity with Vitest . Nice to Have Knowledge of CICD . Experience with Kafka . Familiarity with NinjaFork . Understanding of MQ .

🏢 Summary: Lead Software Engineer role in the banking sector focused on delivering and modernizing the Global Disbursement Platform using Java and React technologies. The position involves leading a team, building and migrating microservices, and implementing automation within an Agile environment. Long-term B2B contract with hybrid work model and technical interview process. 🗂️ Requirements: Java 11+ expertise, Kubernetes experience, Proficiency in Git, Experience with Unix-based systems, SQL knowledge, Understanding of RESTful microservices, Experience with JavaScript and React, Team leadership experience, Senior-level system design experience, Fluent English 📃 Skills: Java, Kubernetes, Git, Unix, SQL, Oracle, REST, API, JavaScript, React, Spring, SpringBoot, HTTP 🏢 Description: 🌍Work mode: hybrid (preferably from Krakow or Warsaw): • People from Krakow and Warsaw - 6x per month in the office. • People outside of Krakow and Warsaw - 4-5x per month in the office. ⏰Start: ASAP/30 days. 📝Contract: B2B. ⚙️Recruitment process: technical interview 1h on zoom, live coding. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. The Lead Software Engineer role aims to support the delivery of high-quality projects for the Global Disbursement Platform, enhancing business operations in financial transactions through effective analysis, Agile design, and stakeholder management. Main Responsibilities Team management. Building and supporting services, microservices, and applications (back-end & front-end) in Java 11/17/21 and ReactJS, while maintaining standard products. Migrating from mainframe and IBM WebSphere to modern integration approaches using APIs or microservices. Reducing testing costs by implementing automation testing frameworks. Increasing Straight-Through-Processing (STP) capabilities of services. Leading the India Team. Key Requirements: Perfect English skills. Java 11+ expertise (Java 17+ preferred). Kubernetes experience. Proficiency in Git. Fluency in Unix-based systems and command-line interfaces. Database technologies and SQL knowledge ( Oracle preferred). Understanding of RESTful microservices and APIs . Experience with HTTP web technologies, particularly JavaScript and React. Proven team leadership experience (leading POD / engineering team) Strong ownership and proactive approach to problem-solving and delivery Ability to work independently and drive initiatives , not only execute tasks High level of assertiveness in communication and technical discussions Solid senior-level technical experience in system design and complex environments Nice to Have: Experience in a DevOps delivery team. Understanding of application monitoring. Knowledge of Spring/Spring Boot. Other Details: Team Structure: Leading an India Team. Work Environment: Agile methodology. Technologies: Java, Kubernetes, APIs, SQL.

🏢 Summary: Lead Software Engineer role in the banking sector focused on delivering and modernizing a Global Disbursement Platform using Java and React within an Agile environment. The position involves building microservices, migrating legacy systems to API-based architectures, implementing test automation, and leading an international team. Long-term B2B contract with hybrid work model and English-speaking project environment. 🗂️ Requirements: Java 11+ expertise, Experience with Kubernetes, Proficiency in Git, Experience with Unix-based systems, Strong SQL knowledge, Experience with Oracle databases, Understanding of RESTful microservices, Experience with APIs, Knowledge of JavaScript, Experience with React, Ability to lead technical team, Experience with automated testing frameworks 📃 Skills: Java, Kubernetes, Git, Unix, SQL, Oracle, REST, APIs, JavaScript, React, Spring, SpringBoot, HTTP, Microservices 🏢 Description: 🌍Work mode: hybrid (preferably from Krakow or Warsaw): • People from Krakow and Warsaw - 6x per month in the office. • People outside of Krakow and Warsaw - 4-5x per month in the office. ⏰Start: ASAP/30 days. 📝Contract: B2B. ⚙️Recruitment process: · I stage: technical interview 1h on zoom, live coding. · II stage: karat test online. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. The Lead Software Engineer role aims to support the delivery of high-quality projects for the Global Disbursement Platform, enhancing business operations in financial transactions through effective analysis, Agile design, and stakeholder management. Main Responsibilities Building and supporting services, microservices, and applications (back-end & front-end) in Java 11/17/21 and ReactJS, while maintaining standard products. Migrating from mainframe and IBM WebSphere to modern integration approaches using APIs or microservices. Reducing testing costs by implementing automation testing frameworks. Increasing Straight-Through-Processing (STP) capabilities of services. Leading the India Team. Key Requirements: Perfect English skills. Java 11+ expertise (Java 17+ preferred). Kubernetes experience. Proficiency in Git. Fluency in Unix-based systems and command-line interfaces. Database technologies and SQL knowledge ( Oracle preferred). Understanding of RESTful microservices and APIs . Experience with HTTP web technologies, particularly JavaScript and React. Nice to Have: Experience in a DevOps delivery team. Understanding of application monitoring. Knowledge of Spring/Spring Boot. Other Details: Team Structure: Leading an India Team. Work Environment: Agile methodology. Technologies: Java, Kubernetes, APIs, SQL.

🏢 Summary: Lead Software Engineer role in the banking sector focused on delivering and modernizing the Global Disbursement Platform using Java and React technologies. The position involves building microservices, migrating legacy systems to modern APIs, implementing test automation, and leading an international team. Long-term B2B contract with hybrid work model and full-time engagement. 🗂️ Requirements: Java 11+ expertise, Experience with Kubernetes, Proficiency in Git, Fluency in Unix-based systems, Knowledge of SQL and database technologies, Understanding of RESTful microservices and APIs, Experience with HTTP web technologies, Experience with JavaScript and React, Professional English proficiency 📃 Skills: Java, Kubernetes, Git, Unix, SQL, Oracle, REST, API, HTTP, JavaScript, React, Spring, SpringBoot 🏢 Description: 🌍Work mode: hybrid (preferably from Krakow or Warsaw): • People from Krakow and Warsaw - 6x per month in the office. • People outside of Krakow and Warsaw - 4-5x per month in the office. ⏰Start: ASAP/30 days. 📝Contract: B2B. ⚙️Recruitment process: · I stage: technical interview 1h on zoom, live coding. · II stage: karat test online. ⏳Duration: >12 months contracts. 📕Project language: English. 💼Industry: Banking. 💻Workload: Full time. The Lead Software Engineer role aims to support the delivery of high-quality projects for the Global Disbursement Platform, enhancing business operations in financial transactions through effective analysis, Agile design, and stakeholder management. Main Responsibilities Building and supporting services, microservices, and applications (back-end & front-end) in Java 11/17/21 and ReactJS, while maintaining standard products. Migrating from mainframe and IBM WebSphere to modern integration approaches using APIs or microservices. Reducing testing costs by implementing automation testing frameworks. Increasing Straight-Through-Processing (STP) capabilities of services. Leading the India Team. Key Requirements: Perfect English skills. Java 11+ expertise (Java 17+ preferred). Kubernetes experience. Proficiency in Git. Fluency in Unix-based systems and command-line interfaces. Database technologies and SQL knowledge ( Oracle preferred). Understanding of RESTful microservices and APIs . Experience with HTTP web technologies, particularly JavaScript and React. Nice to Have: Experience in a DevOps delivery team. Understanding of application monitoring. Knowledge of Spring/Spring Boot. Other Details: Team Structure: Leading an India Team. Work Environment: Agile methodology. Technologies: Java, Kubernetes, APIs, SQL.

🏢 Summary: Senior Fullstack Developer role focused on modernizing banking systems through REST API development, microservices extraction, and system integrations. The position involves refactoring legacy applications and contributing to both microservice and monolith architectures in an international environment. Hybrid work model with B2B contract. 🗂️ Requirements: Minimum 6 years of experience in Java development, Experience with reactive programming, Working knowledge of Spring framework, Working knowledge of Hibernate, Experience with SQL, Experience with REST API development, Experience with microservices architecture, Experience with Git, Minimum 2 years of experience with Angular 📃 Skills: Java, Spring, Hibernate, SQL, REST, Microservices, Git, Angular, Reactive, DDD, Cucumber, SAFe 🏢 Description: Industry: Banking Work model: Hybrid in Warsaw or Tricity - 3 days a week in the office Rate: up to 170 PLN/h (B2B contract) Summary: The role of a Senior Fullstack Developer focuses on modernizing systems, enhancing customer experience through API development, and ensuring seamless integration of various services. Main Responsibilities: Core duties include building REST API solutions and collaborating with teams to create optimal solutions. Building REST API solutions and integrations with other applications Refactoring legacy applications by extracting logic into microservices Collaborating with other developers, teams, and stakeholders to create optimal solutions Participating in the development and continuous improvement of services in both microservice and monolith architectures Key Requirements: Hands-on experience in Java development (at least 6 years preferred) Familiarity with reactive programming Working knowledge of Spring and Hibernate frameworks Experience with SQL, REST, Microservices, and GIT At least 2 years of experience with Angular Nice to Have: Familiarity with the DDD (Domain-Driven Design) approach Experience with Cucumber framework Previous work in an international team with English as the common language Exposure to SAFE Agile methodologies Other Details: Team Composition: International team. Communication Language: English.

🏢 Summary: Senior Fullstack Developer role focused on modernizing banking systems through REST API development, microservices extraction, and system integrations. The position involves enhancing customer-facing services and contributing to both microservice and monolith architectures in an international environment. Hybrid work model with B2B contract up to 170 PLN/h. 🗂️ Requirements: Minimum 6 years of commercial experience in Java development, Experience with reactive programming, Working knowledge of Spring framework, Working knowledge of Hibernate, Experience with SQL, Experience building REST APIs, Experience with microservices architecture, Experience with GIT, Minimum 2 years of experience with Angular 📃 Skills: Java, Spring, Hibernate, SQL, REST, Microservices, GIT, Angular, Cucumber, DDD 🏢 Description: Industry: Banking Work model: Hybrid in Warsaw or Tricity - 3 days a week in the office Rate: up to 170 PLN/h (B2B contract) Summary: The role of a Senior Fullstack Developer focuses on modernizing systems, enhancing customer experience through API development, and ensuring seamless integration of various services. Main Responsibilities: Core duties include building REST API solutions and collaborating with teams to create optimal solutions. Building REST API solutions and integrations with other applications Refactoring legacy applications by extracting logic into microservices Collaborating with other developers, teams, and stakeholders to create optimal solutions Participating in the development and continuous improvement of services in both microservice and monolith architectures Key Requirements: Hands-on experience in Java development (at least 6 years preferred) Familiarity with reactive programming Working knowledge of Spring and Hibernate frameworks Experience with SQL, REST, Microservices, and GIT At least 2 years of experience with Angular Nice to Have: Familiarity with the DDD (Domain-Driven Design) approach Experience with Cucumber framework Previous work in an international team with English as the common language Exposure to SAFE Agile methodologies Other Details: Team Composition: International team. Communication Language: English.