Fullstack Developer (Java+React)

• Own features end-to-end: design, implement, test, deploy, and maintain across the full stack. Work split ~80% backend, 20% frontend
• Make foundational architectural decisions on a greenfield codebase - data models, API contracts, service boundaries, test strategy
• Build and maintain the Java/Spring Boot backend that powers the product's core logic
• Contribute to the React/TypeScript frontend when needed - you're backend-primary, but you ship UI when the team needs it
• Integrate AI coding tools into your daily workflow to accelerate delivery while maintaining code quality - and help the team adopt these practices
• Collaborate directly with product stakeholders to refine requirements in a fast-moving, low-ceremony environment

• Strong Java and Spring Boot expertise - clean API design, domain modeling, sound architectural trade-offs. You think in terms of service boundaries, data flow, and maintainability, not just making it work
• Solid grasp of software design principles - object-oriented programming, SOLID, clean architecture, separation of concerns. You write code that the next person can read, extend, and trust. You know when a pattern helps and when it's ceremony
• Working proficiency in React and TypeScript - you can pick up frontend tasks, build components, and integrate with backend APIs independently
• Proven experience integrating AI coding tools (Claude Code, Cursor, or equivalent) into daily development workflow - including prompt design for code generation, output validation, and actively preventing AI-generated technical debt. You can describe concrete examples of where AI accelerated your delivery and where you chose to override it
• Testing as a professional discipline, not a checkbox - you write unit, integration, and API tests as part of delivery, own the test pyramid decisions, and treat untested code as unfinished code
• PostgreSQL - schema design, query optimization, migrations in a production context
• AWS experience - you've deployed and operated production workloads on AWS (ECS/EKS, RDS, Lambda, S3) and can make informed infrastructure decisions
• Comfort working in ambiguous, greenfield settings - you define scope with stakeholders rather than waiting for pre-scoped tickets
• Nice-to-Have: Infrastructure as Code (Terraform).Healthcare, diagnostics, or regulated-environment experience, Security hardening practice - threat modeling, dependency scanning, secure defaults, Observability tooling (CloudWatch, Prometheus, Grafana), CI/CD pipeline design (GitHub Actions or similar)

• Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development
• Consultant Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors
• Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics
• Spectacular events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g. family picnics),
• Professional growth beyond your current project. You can actively engage in knowledge sharing through the 7N Services offering, designed for 7N clients.
• Connections and access to the expertise of top IT professionals in the market – the average professional tenure of our consultants in Poland is over 10 years,
• A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad.

Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives.

Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.