Senior Full-Stack Developer (React + Java)

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?

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• End‑to‑end ownership with a modern tech stack
• Stability combined with continuous growth
• Autonomy and high‑quality collaboration

 

Project

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• 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

• 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

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• 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?

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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

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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.