Team Leader / Senior Full-stack Developer (React/Node)

Salary: 1100 - 1400 PLN net / dayRemote: hybrid work (one, two day/days per week in the office in Gdynia)Why choose this offer?International working environmentOpportunity to Work on Critical Financial SystemsLong-Term Strategic PartnershipInnovation Through Modern TechnologiesProjectWe are looking for a Senior Fullstack Developer to join a finance project, delivering key solutions for one of the leading financial institutions in Europe. In this role, you will be responsible for designing, developing, and maintaining full-stack features using React and Node.js, with a strong focus on performance, scalability, and clean architecture. A core part of your responsibilities will include implementing and optimizing Backend-for-Frontend (BFF) layers to aggregate services and streamline communication between the frontend and backend systems.We are seeking someone with leadership skills, who can take ownership of a small team, providing guidance, onboarding, and mentoring as needed. You should be comfortable supporting less experienced developers and helping them grow within the project.Expected competences and knowledgeMin. 5 years of proven experience with both React and Node.js in production environments (preferred candidates will have prior experience in team leadership and technical mentoring)Deep understanding of the Backend-for-Frontend (BFF) patternAbility to design scalable and performant APIs tailored to frontend needsExperience coordinating authentication flows and session managementStrong troubleshooting skills across frontend and backend layersFamiliarity with code quality tools, testing frameworks, and CI/CD pipelinesEnglish proficiency at minimum B2 level (spoken and written)Leadership skills in guiding integration and architectural choicesExcellent communication and collaboration skillsTechnologies you'll work withReact, Node.jsBFF patternTypeScriptREST APIsOAuth/session cookiesGitCI/CDClient – why choose this particular client from the Jit portfolio?Jit Team is proud to partner with one of the leading European financial groups responsible for the registration, ownership records, and financial settlement of securities traded on financial markets in Norway and recently extended to other European markets. Jit Team has been a strategic partner to our client in the area of software development since 2017. Over the course of the partnership, Jit Team's dedicated team working for our client has grown from three to over 30 people, who have worked on the modernization of legacy applications, the implementation of new systems, and the development of a private cloud-based platform to host a variety of financial systems.About Jit TeamThe 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.