Senior Android Developer

🏢 Summary: B2B contract role for an experienced Android Mobile Engineer to design and develop scalable native applications for a large-scale e-commerce platform. The position focuses on building high-quality Android apps using Kotlin and Jetpack Compose, with strong ownership over architecture and engineering standards. Work is in an elastic hybrid model with long-term cooperation on a high-traffic system. 🗂️ Requirements: Fluent Kotlin and Jetpack Compose experience, Strong knowledge of Android SDK and native Android development, Practical knowledge of OOP, algorithms, and data structures, Experience with Gradle build system, Experience with CI systems, Ability to design scalable and maintainable mobile architecture, English at B2 level 📃 Skills: Kotlin, Jetpack, Compose, Android, SDK, Gradle, CI/CD, OOP, TDD, KMM, Copilot 🏢 Description: Salary: 800 - 1080 PLN/MD + VAT (B2B) Remote: elastic hybrid from Warsaw (1-2 times per week) Why choose this offer? Impact on the development of the largest e-commerce system in Poland You can expect a flexible work organization Long-term cooperation within a stable ecosystem The Jit community will bring you a nice time during regular integration meetings Project We are looking for an experienced Mobile Engineer (Android) to join a newly established team dedicated to one of Poland’s leading e-commerce companies. In this role, you will combine strong technical expertise with autonomy in delivering high-quality native Android applications . You will play a key role in shaping the architecture, development standards, and engineering practices within the team, working on modern, scalable mobile solutions. You will design, build, and optimize Android applications using Kotlin and Compose, ensuring smooth performance, maintainability, and scalability. In addition to hands-on development, you will contribute to technical initiatives, best practices, and team knowledge sharing in a collaborative, innovative environment. Expected competences and knowledge Fluent in Kotlin and the Compose framework for UI In-depth knowledge of Android SDK and native Android development Practical knowledge of Object-Oriented Programming (OOP), algorithms, and data structures Familiarity with Gradle build processes and experience with Continuous Integration (CI) systems High degree of autonomy in organizing work and strong problem-solving skills Good communication skills in English (B2-level) Nice to have: Experience with modular architecture, e.g., Kotlin Multiplatform Mobile (KMM) Experience working with large codebases Practical knowledge of Test-Driven Development (TDD) and Pair Programming Experience with AI-aided software development, like Copilot Technologies you'll work with Kotlin Jetpack Compose Android SDK Gradle & CI/CD tools TDD AI-assisted development tools Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Remote B2B role for a Mobile Developer to build and optimize advertising components in a large-scale Android e-commerce application. The position focuses on native Android development combined with WebView-based ad integrations in a performance-critical environment. You will ensure high app performance while integrating JavaScript-driven advertising solutions. 🗂️ Requirements: 3+ years commercial experience in native Android development with Kotlin, Strong knowledge of mobile architecture patterns (MVVM, MVI, Clean Architecture), Hands-on experience with Android WebView and native-to-web communication, Solid knowledge of JavaScript, HTML and CSS, Experience with REST APIs and asynchronous programming, Ability to write unit and integration tests, Strong understanding of software engineering principles, Knowledge of data structures and algorithms 📃 Skills: Kotlin, Android, WebView, JavaScript, HTML, CSS, REST, Git, MVVM, MVI, CleanArchitecture, Asynchronous, UnitTesting, IntegrationTesting, DataStructures, Algorithms 🏢 Description: Salary: 960 - 1200 PLN/MD + VAT (B2B) Work Model: remote Why choose this offer? Impact on the development of the largest e-commerce system in Poland You can expect a flexible work organization The Jit community will bring you a nice time during regular integration meetings Project We are looking for a Mobile Developer to support a project in the Advertising domain for one of Poland’s leading e-commerce platforms. The engineer will work within a team responsible for the technological layer of ad delivery in a large-scale mobile application. You will contribute to building and optimizing advertising components in a performance-critical environment, balancing monetization goals with excellent user experience. This includes ensuring that advertising scripts and integrations do not negatively impact application performance (e.g., blocking the main thread). We are looking for a hybrid-minded developer who understands both native mobile development and web-based ad technologies—especially JavaScript execution within WebView contexts—while maintaining a strong foundation in the native Android stack. Expected competences and knowledge 3+ years of commercial experience in native Android development (Kotlin) Strong understanding o f mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) Hands-on experience with Android WebView , including native-to-web communication Solid understanding of JavaScript, HTML, and CSS Experience with REST APIs and asynchronous programming Ability to write unit and integration tests Strong understanding of software engineering principles, data structures, and algorithms Proactive problem-solving mindset and passion for building high-quality user experiences (UX) Nice to have : Experience with high-traffic mobile applications Knowledge of RxJava/RxKotlin, Coroutines, or Jetpack Compose Familiarity with A/B testing Open-source contributions or active GitHub profile Experience in Agile/Scrum environments Technologies you'll work with Kotlin (Android) JavaScript HTML / CSS Android WebView REST APIs Git Jetpack Compose Coroutines / RxJava Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Short-term contract for an experienced Mobile Developer to build and maintain cross-platform mobile applications using Flutter for Android and iOS. The role focuses on delivering high-performance, responsive apps with strong architecture and best practices. The project runs until the end of June in an international environment. 🗂️ Requirements: Commercial experience as Mobile Developer (regular or senior level), Strong hands-on experience with Flutter, Experience with Android development, Experience with iOS development, Knowledge of mobile application architecture, Experience in building, testing and releasing mobile apps, Ability to work independently, English proficiency minimum B2 📃 Skills: Flutter, Android, iOS, Dart, Mobile, Git, CI/CD 🏢 Description: Salary: 800 - 1000 PLN/MD + VAT (B2B) Remote: elastic hybrid from Gdynia Why choose this offer? Opportunity to work with an international client from the safety/technology sector The international work environment will give you the opportunity to interact with the English language on a daily basis The Jit community will bring you a nice time during regular integration meetings Project We are looking for a Mobile Developer (Flutter + Android / iOS) who will join to our client operating in the safety and risk management industry for a short-term project running until the end of June. You will be responsible for developing and maintaining mobile applications across both platforms, ensuring high performance, responsiveness, and a seamless user experience. Expected competences and knowledge Proven commercial experience as a Mobile Developer (regular to senior level) Strong hands-on experience with Flutter and Android / iOS development Solid understanding of mobile application architecture and best practices Experience in building, testing, and releasing mobile applications Ability to work independently and take ownership of tasks Strong problem-solving skills Good communication skills in English - min. B2 level Technologies you'll work with Flutter Android / iOS About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: B2B contract for a Senior Android Developer in a financial project building and enhancing modern payment solutions used by thousands of customers. The role focuses on high-quality, scalable and secure Android applications, contributing to architecture and full SDLC within a cross-functional team. Hybrid work model with strong emphasis on modern mobile technologies and CI/CD practices. 🗂️ Requirements: Minimum 5 years commercial experience with Kotlin and Java, Expert knowledge of Android SDK, Strong experience with Jetpack Compose, Solid understanding of MVVM and Clean Architecture, Experience with Coroutines, StateFlow or RxJava, Experience with dependency injection and multi-module architecture, Experience writing unit, integration and UI tests, Knowledge of JUnit, Mockito, Espresso, Turbine, Understanding of Gradle and CI/CD pipelines, Experience integrating RESTful APIs, English level B2 or higher 📃 Skills: Kotlin, Java, Android, SDK, Jetpack, Compose, MVVM, CleanArchitecture, Coroutines, StateFlow, RxJava, JUnit, Mockito, Espresso, Turbine, Gradle, CI/CD, REST, Git 🏢 Description: Salary: 1000 - 1200 PLN/day on B2B Work model: remote Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project You will be involved in a financial project focused on building and enhancing modern payment solutions used by thousands of customers. The project emphasizes high-quality mobile development, scalability, security, and seamless user experience across multiple platforms. You will work in a cross-functional team, contributing to the entire software development lifecycle while helping shape the architecture and technical direction of the Android applications. Responsibilities you'll have Design, develop, and maintain Android applications using Kotlin, Java, and Jetpack Compose Create scalable and maintainable solutions following MVVM and Clean Architecture principles Collaborate with iOS and web teams to maintain platform consistency and alignment Implement and optimize reactive data flows using Coroutines, StateFlow and RxJava Develop and maintain multi-module application architecture and dependency injection solutions Write and maintain automated tests, including unit, UI and flow tests Contribute to CI/CD processes, code reviews, and cupport integration with RESTful APIs Expected competences and knowledge Strong commercial experience with Kotlin and Java development - min. 5 years Expert knowledge of Android SDK and Jetpack Compose Solid understanding of Android Architecture Components , MVVM, and Clean Architecture Experience with reactive programming using Coroutines, StateFlow and/or RxJava Practical knowledge of dependency injection and multi-module application architecture Experience in writing unit, integration, UI, and flow tests using JUnit, Mockito, Espresso and Turbine Good understanding of Gradle, CI/CD pipelines , and version control systems Excellent communication skills in English (min. B2 level) Nice to have: - experience in the payments or fintech domain - backend development experience with Java - understanding of iOS development and web technologies (Angular, TypeScript, JavaScript Technologies you'll work with Kotlin Java Android SDK Jetpack Compose MVVM / Clean Architecture Coroutines, StateFlow, RxJava CI/CD pipelines RESTful APIs Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: Hybrid Flutter and React developer role focused on building and maintaining mobile (iOS/Android) and web applications in the e-commerce domain. The position involves developing new features, integrating with backend APIs, and contributing to architectural decisions. The offer emphasizes modern technologies, technical ownership, and impact on product direction. 🗂️ Requirements: Strong experience with Flutter and Dart, Experience building mobile applications for iOS and Android, Knowledge of mobile architectures (MVVM, MVC or similar), Experience integrating REST or GraphQL APIs, Ability to debug and optimize mobile applications, Strong knowledge of React, Proficiency in JavaScript or TypeScript, Experience with modern frontend development (Hooks, state management), Solid knowledge of HTML and CSS, Experience implementing UI based on Figma designs 📃 Skills: Flutter, Dart, React, JavaScript, TypeScript, HTML, CSS, REST, GraphQL, MVVM, MVC, Figma, iOS, Android, Hooks, StateManagement 🏢 Description: Salary: 1000 - 1300 pln/md B2B Work model: elastic hybrid from Gdynia (at least 2 days per week from the office) Why choose this offer? We focus on modern technologies and a flexible approach – working in an environment where efficiency, collaboration, and autonomy matter. An organizational culture driven by innovation , transparency , and strong partnership within the team. The opportunity to work with leading brands in the e-commerce industry. A smaller organizational structure that allows for a real impact on project direction and technology decisions. Responsibilities (Flutter / Mobile) Design and develop mobile applications (iOS / Android) using Flutter Implement user interfaces based on designs and design systems (Figma) Integrate mobile applications with backend services ( REST / GraphQL APIs ) Ensure high code quality, performance, and application stability Participate in mobile architecture and technical decision-making Maintain and further develop existing mobile applications Additional Responsibilities (React / Web Frontend) Develop and maintain web applications using React Implement responsive and user-friendly interfaces Collaborate on building and maintaining shared UI components Integrate frontend applications with backend services and manage application state Competences and knowledge Flutter / Mobile Strong experience with Flutter and Dart Proven experience in building mobile applications for iOS and Android Understanding of mobile application architectures (e.g. MVVM, MVC , or similar) Experience with API integration Ability to debug, optimize, and improve mobile application performance Frontend / React Strong knowledge of React and JavaScript / TypeScript Experience with modern frontend development (hooks, state management) Solid understanding of HTML and CSS (or CSS-in-JS solutions) Nice to Have Experience with publishing applications to App Store and Google Play Familiarity with CI/CD pipelines for mobile or frontend projects Experience with testing ( unit / widget / e2e ) Knowledge of Material Design guidelines Experience working in Agile / Scrum product teams Understanding of backend systems or overall system architecture Client – why choose this particular client from the Jit portfolio? Polish clothing company originating from Gdańsk is one of the notable examples of business success. Over more than thirty years of its existence, it has come a long way from a small local import company to a major player in the apparel market. Today, it operates in over 25 markets , runs a network of more than 2,000 physical stores , and is rapidly expanding its international e-commerce presence. In recent years, the company has been focusing its investments primarily on IT, which has become a key driver of its business growth. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Frontend-focused Software Developer role in a long-term project for a UK-based digital payments platform, building scalable and secure customer-facing applications. The position involves developing and enhancing Angular and Flutter applications with exposure to backend services and cloud solutions. You will work in cross-functional Agile teams delivering high-quality, business-driven technical solutions. 🗂️ Requirements: Minimum 3 years commercial experience in software development, Strong hands-on experience with Angular, Strong hands-on experience with Flutter, Very good knowledge of HTML, Very good knowledge of CSS, Very good knowledge of TypeScript, Very good knowledge of JavaScript, Experience with C#/.NET backend development, Practical knowledge of SQL Server, Understanding of NoSQL databases, Experience with RESTful APIs, Experience with unit testing, Experience with debugging, Experience working in Agile/Scrum, Experience using Git 📃 Skills: Angular, Flutter, HTML, CSS, TypeScript, JavaScript, C#, .NET, SQL, SQLServer, NoSQL, REST, Git 🏢 Description: Salary: 600-800 PLN/MD net+vat B2B Work model: remote Why choose this offer? Work on real, customer-facing products used daily by clients in the UK and beyond Join a stable yet fast-evolving organization that combines corporate maturity with a tech-driven mindset Be part of a collaborative, product-focused team that values quality, ownership, and innovation Enjoy a people-first culture guided by FAIR™ values: Future-proofing, Approachability, Integrity, and Responsibility Project You will join a long-term project for a UK-based software and payments company delivering integrated digital platforms. The project focuses on building and enhancing scalable, secure, and user-friendly applications that support payment processing, digital services, and internal business operations. You’ll work in cross-functional Agile teams, closely cooperating with Product Owners, Designers, and other Engineers to translate business requirements into high-quality technical solutions. The role has a strong frontend focus (Angular & Flutter) while also giving exposure to backend services and cloud-based solutions. Expected competences and knowledge Minimum 3 years of commercial experience in software development Strong hands-on experience with Angular and Flutter Very good knowledge of HTML, CSS, TypeScript, and JavaScript Experience supporting backend development using C#/.NET Practical knowledge of SQL Server and understanding of NoSQL databases Familiarity with RESTful APIs , unit testing, and debugging Experience working in Agile/Scrum teams and using Git Strong communication skills, problem-solving mindset, and attention to detail Technologies you'll work with Angular Flutter TypeScript, JavaScript C#/.NET SQL Server NoSQL Client – why choose this particular client from the Jit portfolio? JIT Team has recently started a collaboration with this UK- based software and payments company , employing over 900 people and operating its Polish office in Krak ów . The organization specializes in integrated software, payment solutions , and digital services. At the core of they're culture are the FAIR ™ values — Future-proofing, Approachability, Integrity, and Responsibility — which guide everyday decisions and long-term strategy. T hey combine the agility of a tech-driven environment with the stability of an established leader, fostering a collaborative and innovation-focused workplace. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Full-stack role focused on building and maintaining scalable web and mobile applications using React/React Native on the frontend and Java-based backend services within a microservices architecture. The position involves end-to-end feature development, REST API design, and ensuring performance, security, and scalability in a production environment. You will contribute to CI/CD, deployments, and continuous platform improvements in a modern tech stack. 🗂️ Requirements: 6+ years full-stack development experience, Strong experience with React or React Native, Strong command of Java, Experience building REST APIs, Experience with HTTP protocols, Understanding of frontend architecture and state management, Experience with SQL and NoSQL databases (PostgreSQL, MongoDB, Redis), Knowledge of CI/CD pipelines and deployment processes, Experience with microservices architecture 📃 Skills: Java, React, ReactNative, Node.js, REST, HTTP, SQL, PostgreSQL, MongoDB, Redis, Microservices, CI/CD, AWS, Azure, GCP, Docker, Kubernetes 🏢 Description: Salary: 1000-1300 pln/md on B2B Work mode: Elastic hybrid from Gdynia/Gdańsk (1-2 days per week from the office) Why choose this offer? End‑to‑end ownership w ith a modern tech stack Stability combined with continuous growth Autonomy and high‑quality collaboration Project The project focuses on building and maintaining scalable web and mobile applications used by a large and diverse user base. It involves developing modern, user‑friendly interfaces with React or React Native and integrating them with robust backend services built in Java . The system is based on RESTful APIs and microservices architecture, ensuring high performance, security, and scalability. You will work closely with product, design, and QA teams to continuously improve the platform and deliver high‑quality features to production. Responsibilities you'll have Design and develop responsive web and mobile applications using React or React Native Build and maintain backend services and APIs using Java (preferred) or Node.js Develop reusable components, modules, and libraries Design and implement RESTful APIs and microservices Integrate front-end applications with backend systems and third-party services Ensure application performance, scalability, and security Collaborate with cross-functional teams including designers, product managers, and QA Participate in code reviews and maintain code quality standards Support deployment, CI/CD pipelines, and production releases Expected competences and knowledge Over 6 years of experience in full-stack development Good experience with React or React Native Strong command of Java Experience building REST APIs and working with HTTP protocols Understanding of frontend architecture, state management, and component-based design Solid level of SQL / NoSQL (Postgres, Mongo, Redis) Knowledge of CI/CD pipelines and deployment processes Strong problem-solving and analytical skills Good command of AI-powered coding and trust in AI Strong communication and collaboration skills Ability to work independently and within a team Attention to detail and commitment to quality Ability to manage multiple tasks and priorities Adaptability and willingness to learn new technologies Nice to have Experience with microservices architecture Familiarity with cloud platforms (AWS, Azure, or GCP) Experience with containerization (Docker, Kubernetes) Knowledge of testing frameworks and automated testing Experience with mobile app deployment (App Store / Google Play) Technologies you'll work with Java React React Native REST APIs HTTP SQL (PostgreSQL) NoSQL (MongoDB, Redis) Node.js Microservices CI/CD pipelines AWS/Azure/GCP Docker Kubernetes App Store/Google Play AI Client – why choose this particular client from the Jit portfolio? Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Tech Lead role in a Java team responsible for designing, developing, and maintaining scalable, secure software solutions in a Scrum environment. The position combines hands-on Java development with technical leadership, focusing on architecture, microservices, and cloud-based systems on AWS. You will translate business requirements into robust technical solutions aligned with architectural and non-functional standards. 🗂️ Requirements: Strong commercial experience in Java development, Hands-on experience with Spring Boot in production, Experience with AWS in production environments, Experience designing microservices and distributed systems, Strong knowledge of software architecture and design patterns, Experience addressing non-functional requirements (scalability, security, performance), Experience with Docker and CI/CD pipelines, Experience building and maintaining REST APIs 📃 Skills: Java, SpringBoot, AWS, EC2, RDS, S3, CloudWatch, Microservices, Docker, CI/CD, REST, Security, Architecture, DesignPatterns, DistributedSystems 🏢 Description: Salary: 1300 - 1600 PLN/MD on B2B Work model: e lastic hybrid (Warsaw / Kraków / Tricity) or remote with occasional office visits Why choose this offer? You can expect a flexible work organization The international work environment will allow you to interact with the English language daily Scandinavian organizational culture will provide you with a work-life balance The Jit community will bring you a nice time during regular integration meetings Project We are looking for an experienced Tech Lead to join a Java development team responsible for designing, developing, and maintaining high-quality software solutions. This role combines hands-on engineering with technical leadership , focusing on building scalable, secure, and maintainable systems while mentoring the team and driving technical excellence. As a Tech Lead , you will play a key role in t ranslating business requirements into robust technical solutions , ensuring alignment with architectural standards , non-functional requirements (NFRs) , and the broader technology strategy . You will work in an autonomous, self-organizing Scrum team and actively contribute to both delivery and continuous improvement. Expected competencies and knowledge Strong hands-on experience as a Senior Software Engineer with a primary focus on Java development Ability to combine active coding with technical leadership and ownership of technical decisions within the team Proven experience in designing and delivering secure, scalable, and high-quality software solutions Extensive experience with Spring Boot and AWS in production environments Strong understanding of software architecture, design patterns, and non-functional requirements (scalability, security, performance) Experience in designing and working with microservices and distributed systems Ability to coach developers, promote best practices, and support a self-organizing Scrum team Experience working closely with Product Owners and cross-functional stakeholders to translate business requirements into technical solutions Very good communication skills and fluency in spoken and written English Technologies you'll work with Java Spring Boot (REST APIs, Security, Data) AWS (EC2, RDS, S3, CloudWatch) Microservices architecture Docker & CI/CD Nice to have: Kafka React Basic knowledge of C# Client – why choose this particular client from the Jit portfolio? Our client is a Scandinavian supplier of software and services for purchasing and tendering processes in highly formalized conditions, such as orders in accordance with public procurement law at the level of the European Union or individual member states. The delivery center is located in Utrecht. Client’s platforms allow to announce tenders and conduct the entire procedure of collecting and evaluating offers at every stage of the purchasing process. They are used both by public administration bodies at various levels in European countries and by purchasing departments of large companies and corporations. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: B2B role for an experienced Java Developer to design and develop high-availability, horizontally scalable microservices supporting an advertising and billing platform. The position involves working on production systems with real impact on architecture, distributed communication, and system performance. Collaboration with cross-functional teams and Polish-speaking stakeholders is required. 🗂️ Requirements: Minimum 4 years commercial experience as Java Developer, Hands-on experience in production environments, Higher education in relevant field (completed or in progress), Professional proficiency in Polish (spoken and written), Strong knowledge of Java 11+, Practical experience with Spring Boot, Experience with microservices architecture in production, Experience with Kafka or RabbitMQ, Understanding of distributed systems, Advanced knowledge of SQL without ORM usage, Experience with monitoring, logging and metrics, Understanding of asynchronous communication, Familiarity with reactive programming 📃 Skills: Java, Spring, SpringBoot, SQL, NoSQL, Kafka, RabbitMQ, WebFlux, Reactor, Microservices, Kotlin, Hibernate, JPA, Monitoring, Logging 🏢 Description: Salary: 750 - 1000 PLN/MD on B2B Work model: elastic hybrid from Gdynia/Warszawa/Rzeszów/Kraków Why choose this offer? Real impact on system architecture Opportunity to design solutions with high availability and horizontal scalability Collaboration within a mature, cross-functional team Direct communication with Product Owners and non-technical stakeholders Project The team is directly involved in managing advertising campaigns. This enables sellers and advertising agencies to create ads, which are then delivered for airing on the company's portal (e.g., sponsored listings, homepage) and on other platforms such as Google. Additionally, the team is responsible for budgeting and advertising billing. They collaborate closely with teams handling the airing of various types of ads, frontend development, and offers visible on the portal. The project is conducted primarily in Polish, therefore professional working proficiency in Polish (spoken and written) is required. Expected competences and knowledge Minimum 4 years of commercial experience as a Java Developer, with mandatory hands-on experience in production environments Required higher education in a relevant field (or currently in progress) Fluent or professional working proficiency in Polish (spoken and written) Good knowledge of Java 11+ (Kotlin is a plus) First hands-on experience with Spring Boot Practical experience with microservices architecture in production environments Familiarity with messaging systems such as Kafka or RabbitMQ Basic understanding of distributed systems and asynchronous communication Solid understanding of relational databases ( SQL ), including indexes, constraints, and transactions (without relying on ORM frameworks such as Hibernate/JPA) Experience working with monitoring, logging, and application metrics Ability to work in a cross-functional team environment Familiarity with reactive programming concepts Technologies you'll work with Java 11+ Spring Boot NoSQL databases Spring WebFlux / Project Reactor Relational databases (advanced SQL) Nice to have: Kafka Kotlin Event-driven architecture Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999 . With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies. Jit Team has had a successful partnership with our Client since spring 2021 , with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services. Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale , where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: B2B contract role for a senior iOS developer to build and maintain critical payment features within a large-scale digital platform. The position focuses on developing scalable, compliant, and high-availability mobile solutions while modernizing architecture and accelerating feature delivery. Work is hybrid from Warsaw, Gdańsk, or Łódź. 🗂️ Requirements: 5+ years of iOS development experience, Strong Swift knowledge, Strong Objective-C knowledge, Experience with Swift-Objective-C interoperability, Experience with VIPER or MVVM, Experience with UIKit and programmatic UI, Experience with AutoLayout, Experience with REST API integration, Understanding of concurrency and asynchronous programming, Experience with unit testing using XCTest, Experience with mocking and test automation, Experience with modular architecture and dependency management, Ability to collaborate with backend and cross-platform teams 📃 Skills: iOS, Swift, Objective-C, XCTest, VIPER, MVVM, UIKit, SwiftUI, REST, Concurrency, AutoLayout, Mocking, Networking, Java, Angular, TypeScript, JavaScript 🏢 Description: Salary: 1000 - 1200 PLN/day on B2B Work model: remote 100% Why choose this offer? You can expect a flexible work organization The international work environment will give you the opportunity to interact with the English language on a daily basis Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit) The Jit community will bring you a nice time during regular integration meetings Project The project focuses on the development and maintenance of critical payment capabilities within a large-scale digital platform serving millions of active users. It centers on delivering solutions that support payments across multiple digital channels while ensuring regulatory compliance, scalability, and high system availability. The initiative includes parallel efforts related to implementing new payment regulations, driving business growth objectives, and transforming infrastructure, including modernization of payment systems and simplification of architecture. The project also aims to increase team throughput and accelerate delivery of new features to meet market demands and reduce the risk of delays in key strategic and regulatory initiatives. Responsibilities you'll have Development and maintenance of iOS applications using Swift and Objective-C Designing and implementing application architecture ( MVVM / VIPER ) Building UI using UIKit (programmatic UI, Auto Layout) and developing components in SwiftUI Integrating applications with backend systems via REST APIs Managing asynchronous operations and optimizing application performance Creating and maintaining unit and automated tests (XCTest, mocking) Designing modular application structure and managing dependencies Actively participating in application testing to improve delivery flow and eliminate QA bottlenecks Collaborating with backend and cross-platform teams ( Android, Web ) Participating in code reviews and ensuring high code quality Contributing to architectural and technical decision-making Expected competences and knowledge Several years (5+) of experience in iOS application development Unit Testing & Mocking - XCTest for unit and TestAutomation and Swift Testing framework, Architectural Patterns (VIPER/MVVM) Advanced Swift & Objective-C knowledge and expertise, as well the Swift - Objective-C Interoperability Programmatic UI & Auto Layout (with emphasis on UIKit), SwiftUI would be a nice addon, but not required as of today (from the perspective of our codebase, however we would expect that the candidate knows SwiftUI) Experience with modular design and dependency management Networking & Concurrency: The candidate should have a solid understanding of consuming REST APIs, handling asynchronous operations, queues and asynchronous code Have excellent communication skills Payment domain knowledge is a plus Backend development experience (Java) is a plus Are an engineer by heart Actively participate in application testing to prevent QA bottlenecks during high delivery periods. By contributing to testing, you help maintain flow, reduce delays, and improve overall team efficiency. Nice to have Able to understand android and web frontend (Angular, TypeScript, JavaScript), because it helps you to get our platforms aligned Technologies you'll work with iOS Swift REST API Java (Nice to have) Client – why choose this particular client from the Jit portfolio? Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture , which is conducive to people who place emphasis on work-life balance and feedback culture . Furthermore, all projects are executed in international teams, giving constant exposure to the English language. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.