ReactNative & Java Developers - Remote - Poland

🏢 Summary: Hybrid Java & React.js Developer role focused on building and maintaining scalable web applications, covering both backend services and modern frontend interfaces. The position involves developing RESTful APIs, implementing responsive UIs, and supporting integration and deployment through CI/CD pipelines. 🗂️ Requirements: Strong experience with Java, Solid experience with React.js, Experience building and consuming REST APIs, Strong knowledge of JavaScript, Strong knowledge of HTML, Strong knowledge of CSS, Experience with Git, Experience with CI/CD pipelines 📃 Skills: Java, React.js, JavaScript, HTML, CSS, REST, Git, CI/CD 🏢 Description: We are looking for an experienced Java & React.js Developer to join our development team in Kraków. In this role, you will work on building and maintaining scalable web applications, contributing to both backend services and modern frontend interfaces. This position follows a hybrid working model with two/three days per week onsite in Kraków . Key Responsibilities Develop and maintain backend services using Java Build responsive and modern user interfaces using React.js Design and implement RESTful APIs Collaborate with product managers, designers, and engineers to deliver new features Write clean, maintainable, and efficient code Participate in code reviews and contribute to development best practices Troubleshoot and resolve technical issues Support integration and deployment through CI/CD pipelines Required Skills and Experience Strong experience with Java Solid experience with React.js Experience building and consuming REST APIs Strong knowledge of JavaScript, HTML, and CSS Experience with Git and modern development workflows Familiarity with Agile development environments Good communication skills in English Nice to Have Experience with Spring Boot Experience with TypeScript Knowledge of SQL databases Familiarity with Docker or cloud platforms Work Model Hybrid: 2 days onsite in Kraków , remaining days remote.

🏢 Summary: Full-Stack Front-End Developer role focused on building and enhancing modern, cloud-based web applications with strong emphasis on user experience, performance, and scalability. The position involves developing frontend features in React.js, integrating with Java backend services, and working within AWS environments. The role includes maintaining existing applications, optimizing performance, and contributing to best development practices in an Agile team. 🗂️ Requirements: Minimum 3 years commercial experience with React.js, Minimum 3 years commercial experience with JavaScript, Minimum 3 years commercial experience with TypeScript, Minimum 3 years commercial experience with Java, Minimum 3 years commercial experience with AWS, Experience building responsive web applications, Experience integrating frontend applications with APIs, Understanding of frontend architecture, Knowledge of Agile methodologies 📃 Skills: React.js, JavaScript, TypeScript, Java, AWS, API, Agile 🏢 Description: We are looking for a Full-Stack Front-End Developer who is passionate about building modern, cloud-based applications and delivering excellent user experiences. You will work on developing and maintaining several existing applications and services, focusing on improving usability, performance, and scalability in a cloud environment. Responsibilities Maintain and develop high-quality user experiences across multiple web applications and services. Build and enhance frontend features using React.js and modern JavaScript frameworks. Collaborate with backend services developed in Java . Improve application performance, usability, and responsiveness. Work with cloud-based environments hosted on AWS . Fix bugs, optimize existing solutions, and introduce improvements. Collaborate closely with developers, product teams, and stakeholders. Contribute to code reviews and follow best development practices. Required Skills Minimum 3 years of commercial experience with: React.js JavaScript TypeScript Java AWS Experience building responsive and user-focused web applications. Understanding of frontend architecture and modern UI development practices. Experience integrating frontend applications with APIs. Knowledge of Agile development methodologies. Strong problem-solving and communication skills.

🏢 Summary: Hybrid Java Fullstack Developer role focused on building and maintaining scalable web applications using Java and React.js. The position involves developing backend services, modern frontend interfaces, and RESTful APIs while supporting CI/CD processes. Work model includes two days onsite in Warsaw with the remaining days remote. 🗂️ Requirements: Strong experience with Java, Solid experience with React.js, Experience building and consuming REST APIs, Strong knowledge of JavaScript, Strong knowledge of HTML, Strong knowledge of CSS, Experience with Git, Experience with CI/CD pipelines, Familiarity with Agile environments, English proficiency 📃 Skills: Java, React, REST, JavaScript, HTML, CSS, Git, CI/CD, Spring, TypeScript, SQL, Docker 🏢 Description: We are looking for an experienced Java Fullstack Developer to join our development team in Kraków. In this role, you will work on building and maintaining scalable web applications, contributing to both backend services and modern frontend interfaces. This position follows a hybrid working model with two/three days per week onsite in Warsaw . Key Responsibilities Develop and maintain backend services using Java Build responsive and modern user interfaces using React.js Design and implement RESTful APIs Collaborate with product managers, designers, and engineers to deliver new features Write clean, maintainable, and efficient code Participate in code reviews and contribute to development best practices Troubleshoot and resolve technical issues Support integration and deployment through CI/CD pipelines Required Skills and Experience Strong experience with Java Solid experience with React.js Experience building and consuming REST APIs Strong knowledge of JavaScript, HTML, and CSS Experience with Git and modern development workflows Familiarity with Agile development environments Good communication skills in English Nice to Have Experience with Spring Boot Experience with TypeScript Knowledge of SQL databases Familiarity with Docker or cloud platforms Work Model Hybrid: 2 days onsite in Warsaw , remaining days remote.

🏢 Summary: Fullstack Developer role focused on building and maintaining web applications using Java on the backend and React on the frontend. The position involves API design, database integration, and unit testing to deliver robust, high-quality software. Candidates will work across the full stack, contributing to both development and code quality processes. 🗂️ Requirements: 2+ years of Java programming experience, Strong knowledge of SQL, Experience with API definition, Proficiency in Git, Experience with JUnit testing, Proficiency in React, Proficiency in Next.js 📃 Skills: Java, React, Next.js, SQL, API, Git, JUnit 🏢 Description: Introduction & Summary: We are seeking a skilled Fullstack Developer specializing in Java and React. The ideal candidate will have over 2 years of experience in Java programming along with a solid understanding of modern frontend frameworks. The role requires proficiency in SQL and API definition, as well as experience with Git and Junit, making it essential for creating robust applications. Main Responsibilities: The Fullstack Developer will take on a pivotal role in our development team, responsible for both backend and frontend tasks. Develop and maintain web applications using Java and React. Define and implement APIs for seamless integration. Collaborate with cross-functional teams to design and deliver software solutions. Conduct unit testing to ensure high-quality code. Utilize Git for version control and collaboration. Key Requirements: 2+ years of experience in Java programming. Strong knowledge of SQL. Experience with API definition. Proficiency in Git. Experience with Junit testing. Proficient in frontend frameworks - React and Next.js. Nice to Have: Experience with Kafka and Spring Kafka (very nice to have). Some experience in microservices development. Familiarity with MongoDB. Experience with Spring Data JPA.

🏢 Summary: Senior React Native Engineer role focused on building and scaling high-performance mobile applications using a modern tech stack. The position involves developing new features, contributing to architectural decisions, and ensuring code quality through testing and best practices. The role requires close collaboration with cross-functional teams to deliver reliable, production-ready apps. 🗂️ Requirements: 5+ years of software development experience, Strong expertise in React Native, Proficiency in JavaScript and TypeScript, Experience building production-ready mobile applications, Understanding of mobile UI/UX optimization, Experience with performance tuning, Familiarity with HTML and CSS/SASS, Basic knowledge of React, Experience with backend integration, Experience with SQL databases, Experience with API integration, Ability to write unit tests, Strong debugging and troubleshooting skills, Fluent English (B2/C1 minimum) 📃 Skills: ReactNative, JavaScript, TypeScript, HTML, CSS, SASS, React, SQL, APIs, UnitTesting, Debugging, Mobile, UI, UX, Performance, Backend 🏢 Description: Senior React Native Engineer We’re looking for an experienced Senior React Native Engineer to join our team and contribute to a new project built with a modern tech stack. If you’re motivated by creating meaningful solutions and enjoy working on impactful products, we’d love to hear from you! What you’ll do: Build and maintain mobile applications using React Native, ensuring clean, scalable, and well-documented code Develop new features and enhance existing ones for high-performance and reliable apps Participate in architectural discussions and technical decision-making Write and maintain unit tests to guarantee code quality and stability Collaborate closely with product managers, designers, and stakeholders to deliver impactful solutions Review peers’ code, provide feedback, and encourage engineering best practices What you bring: 5+ years of professional experience in software development, with strong expertise in React Native Solid knowledge of JavaScript/TypeScript and proven experience building production-ready apps Understanding of mobile UI/UX optimization and performance tuning Familiarity with HTML, CSS/SASS , and cross-platform design principles Basic knowledge of React , and backend stack Experience with SQL databases and API integration Strong debugging, problem-solving, and troubleshooting skills Excellent collaboration skills and ability to work in an international team Fluent English (B2/C1 level minimum) Benefits: multisport medical care insurance remote work

🏢 Summary: Senior React Native Developer role focused on designing, developing, and maintaining cross-platform mobile applications using React Native. The position involves building new features, optimizing performance, integrating backend services, and ensuring high code quality. It requires strong expertise in modern JavaScript/TypeScript and mobile development practices. 🗂️ Requirements: Minimum 4 years of mobile application development experience, At least 2 years of commercial experience with React Native, Strong knowledge of JavaScript (ES6+), Strong knowledge of TypeScript, Experience with state management (Redux or Context API), Experience integrating REST API or GraphQL, Experience publishing apps to App Store and Google Play, Ability to debug and optimize mobile applications, Experience with CI/CD tools, Experience with code reviews and applying best coding practices 📃 Skills: React, ReactNative, JavaScript, TypeScript, Redux, ContextAPI, REST, GraphQL, CI/CD, iOS, Android, Swift, Objective-C, Kotlin, Java, Jest, Detox, Fastlane, Bitrise, AppCenter 🏢 Description: We are seeking an experienced Senior React Native Developer to join our team. In this role, you will be responsible for designing, developing, and maintaining mobile applications using React Native. The ideal candidate has a strong background in JavaScript/TypeScript, hands-on experience with React Native, and a solid understanding of mobile application development. Experience with native development for iOS and/or Android is a strong plus. Responsibilities Design and implement new features for mobile applications using React Native Maintain and enhance existing mobile applications Collaborate with project teams, designers, and QA engineers Optimize application performance and troubleshoot technical issues Participate in code reviews and share knowledge with the team Integrate applications with backend services (REST API, GraphQL) Apply best coding practices and ensure high code quality Requirements Minimum 4 years of experience in mobile application development, including at least 2 years with React Native Strong knowledge of JavaScript (ES6+) and TypeScript Experience with state management tools such as Redux, Context API, or similar Familiarity with publishing apps to the App Store and Google Play Ability to debug and optimize mobile applications Experience with CI/CD tools Good command of English, both written and spoken, for technical communication Nice to have Experience with native iOS development (Swift/Objective-C) and/or Android development (Kotlin/Java) Familiarity with tools like Fastlane, Bitrise, App Center Experience with mobile app testing (e.g., Jest, Detox) Understanding of mobile application security best practices We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Full-Stack / Backend Developer role focused on building and maintaining scalable applications and REST APIs that support client products. The position involves developing new integrations, enhancing existing backend and frontend systems, and improving platform performance and reliability. You will contribute to architecture improvements and work within a cloud-based environment. 🗂️ Requirements: Minimum 3 years commercial experience, Experience with Java, Experience with Spring Boot, Experience with AWS, Experience with MongoDB, Experience with PostgreSQL, Experience with React.js, Experience designing REST APIs, Knowledge of backend architecture, Experience with cloud environments, Understanding of clean code principles, Experience working in Agile environment 📃 Skills: Java, SpringBoot, AWS, MongoDB, PostgreSQL, React, REST, Agile, Cloud, Architecture 🏢 Description: We are looking for an experienced Full-Stack / Backend Developer to join our team and help build scalable applications and APIs supporting our clients’ products. You will work on both backend and frontend solutions, contributing to product development, system improvements, and ongoing platform stability. Your Responsibilities Develop new APIs to support client integrations and business features. Maintain and enhance existing backend and frontend applications. Fix bugs and improve application performance and reliability. Upgrade and support operational aspects of the platform. Identify opportunities to improve product quality, architecture, and development processes. Collaborate with developers, product teams, and stakeholders to deliver high-quality solutions. Participate in code reviews and contribute to best engineering practices. Required Skills Minimum 3 years of commercial experience with: Java Spring Boot AWS MongoDB PostgreSQL React.js Experience designing and developing REST APIs. Knowledge of backend architecture and modern web applications. Experience working with cloud-based environments (AWS). Understanding of software development best practices and clean code principles. Ability to work in an Agile development environment.

🏢 Summary: Hybrid Fullstack Developer role focused on building and maintaining scalable web applications using Java and React.js. The position involves designing backend services and RESTful APIs, developing modern frontend interfaces, and contributing to CI/CD and DevOps practices. Work includes testing, performance optimization, and collaboration on architecture and microservices. 🗂️ Requirements: Strong experience with Java and Spring Boot, Solid experience with React.js and state management, Experience designing and consuming RESTful APIs, Experience with microservices architecture, Proficiency in JavaScript, HTML5, CSS3, Experience with relational or NoSQL databases, Knowledge of unit and integration testing practices, Experience with CI/CD pipelines, Familiarity with Git and version control workflows, Ability to work with Agile/Scrum methodologies 📃 Skills: Java, Spring, SpringBoot, React, Redux, JavaScript, HTML5, CSS3, Webpack, Babel, ESLint, JUnit, Mockito, Jest, MySQL, PostgreSQL, NoSQL, Git, CI/CD, Docker, Kubernetes, AWS, Azure, GCP, Kafka, GraphQL, WebSocket 🏢 Description: We are looking for a highly skilled Fullstack Developer with expertise in Java and React.js to join our Kraków-based development team. You will design, develop, and maintain scalable, high-performance web applications, contributing to both backend services and rich frontend interfaces. This role follows a hybrid working model , with 2–3 days per week onsite in Kraków. Key Responsibilities Backend Development: Architect, implement, and maintain backend services using Java , Spring Boot , and related frameworks Frontend Development: Build responsive, modular, and maintainable React.js applications with a focus on component-driven design Design and implement RESTful APIs and microservices , ensuring high performance, security, and scalability Collaborate with cross-functional teams to define technical requirements , system architecture, and feature implementation Apply unit testing, integration testing, and end-to-end testing best practices (JUnit, Mockito, Jest, React Testing Library) Participate in code reviews , enforce coding standards, and promote best practices in clean code, SOLID principles, and design patterns Troubleshoot and optimize application performance and resolve production issues Manage CI/CD pipelines , automate deployments, and support DevOps practices Stay up-to-date with emerging technologies and frameworks to continuously improve application architecture Required Skills and Experience Strong experience with Java , Spring Boot , and related backend frameworks Solid experience with React.js , Redux , or state management libraries Proven experience in designing and consuming RESTful APIs and microservices architecture Proficient in JavaScript, HTML5, CSS3, and modern frontend tooling (Webpack, Babel, ESLint) Experience with relational databases (MySQL, PostgreSQL) and/or NoSQL databases Familiarity with Git , version control workflows, and Agile/Scrum methodologies Understanding of unit testing, integration testing, and test-driven development (TDD) Good problem-solving and communication skills in English Nice to Have Experience with TypeScript and advanced React patterns (Hooks, Context API, Suspense) Knowledge of Docker , Kubernetes , or cloud platforms (AWS, Azure, GCP) Experience with event-driven architectures , message queues , or Kafka Familiarity with GraphQL or WebSocket-based real-time applications

🏢 Summary: Senior React Native Developer role focused on building and evolving a large-scale, multi-module mobile platform used by millions of users across Europe and North America. The position involves driving architectural decisions, developing complex mobile applications in React Native and TypeScript, and mentoring engineers while ensuring high performance and scalability. You will collaborate cross-functionally and contribute to CI/CD, native integrations, and continuous technical improvements. 🗂️ Requirements: 5+ years commercial software development experience, 4+ years experience with React Native, Experience building and maintaining large-scale mobile applications, Strong knowledge of TypeScript and modern JavaScript, Experience with React Hooks, Understanding of modular and multi-module architecture, Experience with MobX, Experience with React Query (TanStack Query), Knowledge of native mobile development concepts for iOS and Android, Experience integrating REST APIs, Experience with GraphQL, Experience with form management solutions, English proficiency at B2 level or higher, Polish proficiency at B2 level or higher, Residence in Poland 📃 Skills: React, ReactNative, TypeScript, JavaScript, MobX, ReactQuery, TanStackQuery, iOS, Android, REST, GraphQL, CI/CD, Firebase 🏢 Description: Join one of Europe's largest mobile platforms, delivering digital services used by millions of users across multiple countries in Europe and North America. Built on a multi-module architecture, the platform enables rapid product development, high code reusability, and continuous expansion into new business areas. As a Senior React Native Developer, you will play a key role in shaping the architecture of a big mobile ecosystem, driving technical decisions, mentoring other engineers, and delivering high-quality solutions at scale. Your tasks Design, develop, and maintain complex mobile applications using React Native and TypeScript Drive architectural decisions and contribute to the evolution of our multi-module platform Lead technical discussions and participate in solution design Review code, mentor team members, and promote engineering best practices Collaborate closely with Product Owners, UX Designers, Backend Engineers, QA Engineers, and Architects Improve application performance, reliability, scalability, and maintainability Contribute to CI/CD processes and development tooling Support the integration of native mobile capabilities and third-party services Identify technical debt and proactively drive improvements across the codebase Requirements At least 5 years of commercial software development experience, including at least 4 years with React Native Proven track record of building and maintaining large-scale mobile applications Strong expertise in TypeScript, modern JavaScript, and React Hooks Solid understanding of modular and multi-module application architecture Hands-on experience with MobX and React Query (TanStack Query) Knowledge of native mobile development concepts and creating native modules for iOS and Android Practical experience with REST APIs, GraphQL, and form management solutions English and Polish proficiency at the B2 level or higher Residing in Poland required Nice-to-have requirements Payment integrations and mobile wallet solutions Geolocation and location-based services Firebase services and analytics Mobile security best practices Observability and monitoring tools Background in large-scale international products Agile delivery experience (Scrum/Kanban) What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Full Stack Developer role focused on building scalable backend services in Java and modern, responsive front-end applications in React.js. The position involves designing RESTful APIs, collaborating with cross-functional teams, and delivering clean, maintainable, high-quality code in a hybrid work model. 🗂️ Requirements: Commercial experience with Java, Experience with Spring Boot framework, Strong knowledge of React.js, Proficiency in modern JavaScript, Experience designing and consuming RESTful APIs, Experience with relational or non-relational databases, Experience with version-controlled collaborative development, Availability to work onsite in hybrid model (Cracow) 📃 Skills: Java, SpringBoot, React, JavaScript, REST, SQL, NoSQL, AWS, Azure, GCP, Docker, Kubernetes, CICD 🏢 Description: 𝗪𝗲 𝗔𝗿𝗲 𝗛𝗶𝗿𝗶𝗻𝗴: 𝗝𝗮𝘃𝗮 𝗮𝗻𝗱 𝗥𝗲𝗮𝗰𝘁.𝗷𝘀 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 We are currently seeking a skilled and motivated Full Stack Developer with strong expertise in Java and React.js to join our growing team. In this role, you will be responsible for designing and developing scalable backend services using Java, as well as building modern, responsive user interfaces using React.js. You will work closely with cross-functional teams to deliver high-quality, reliable solutions, while ensuring that your code is clean, maintainable, and efficient. 𝗞𝗲𝘆 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀: Developing robust backend applications using Java, ideally with Spring Boot Creating intuitive and high-performing front-end applications using React.js and modern JavaScript Designing and consuming RESTful application programming interfaces Collaborating with colleagues across engineering, product, and design teams Contributing to code reviews and continuous improvement practices 𝗪𝗲 𝗮𝗿𝗲 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗰𝗮𝗻𝗱𝗶𝗱𝗮𝘁𝗲𝘀 𝘄𝗵𝗼 𝗵𝗮𝘃𝗲: Proven experience working with Java and related frameworks Strong knowledge of React.js and modern JavaScript standards Experience working with relational or non-relational databases A proactive approach to problem-solving and a strong attention to detail Excellent communication and teamwork skills It would be beneficial if you also have: Experience working with cloud platforms such as Amazon Web Services, Microsoft Azure, or Google Cloud Platform Exposure to continuous integration and continuous delivery pipelines Familiarity with containerisation technologies such as Docker and Kubernetes 📍 𝗟𝗼𝗰𝗮𝘁𝗶𝗼𝗻: Cracow, Poland (Hybrid – 3 days per week onsite) 💼 𝗘𝗺𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 𝗧𝘆𝗽𝗲: B2B If you are passionate about building impactful technology and are looking to take the next step in your career, we would be delighted to hear from you. Please apply or get in touch directly for more information.