April 12, 2026

Fullstack Developer

Senior • Hybrid

Warsaw, Poland

Get on board with B3 Consulting Poland – a Polish outsourcing company with Scandinavian roots.

We value energy, logic, experience and freedom, all embedded in a truly Scandinavian work culture.

At B3, our CARE philosophy is more than a slogan.

It’s how we think and work every day – we care about people, tailor solutions to real needs, and take responsibility for what we build. We’re not just a workplace. We’re a community of passionate people who enjoy working together and learning from each other 🙌

We are currently looking for a Senior Fullstack Developer to help us build and grow a digital innovation center in Poland. You will join a team developing a corporate investment application where 90% of your work will focus on creating brand-new solutions.

🚀 Your mission on board:

  • Development: You will be responsible for designing and implementing new backend and frontend features for large corporate investment platform.

  • Architectural Influence: Beyond coding, you will actively participate in technical analysis and high-level discussions to shape the future of our systems.

  • Quality & Collaboration: You will perform thorough code reviews and participate in Scrum events, ensuring the team delivers stable and scalable software.

  • Proactive Innovation: We look for developers who take ownership, bring their own ideas to the table, and show initiative in improving our engineering standards.

🚀 What you’ll need to come on board:

  • Senior Expertise: Minimum 5 years of commercial experience in fullstack development.

  • Solid Backend Stack: Proficiency in Java 8 / 17, the Spring Framework, and Java design patterns. You should have strong knowledge of JDBC, collections, and memory management.

  • Modern Frontend Stack: Extensive experience with Angular 14+, TypeScript, and reactive programming (RxJS).

  • Database Mastery: Strong hands-on experience with RDBMS and SQL.

  • Engineering Excellence: Good understanding of Git, npm, Web APIs, and OpenAPI (Swagger).

  • Communication & Mindset: English at a minimum B2 level and a proactive attitude towards working in an Agile/Scrum environment.

🎁 What we offer

  • Health & sports benefits tailored to your needs

  • Free running and swimming trainings

  • Internal triathlon team and joint competitions (Warsaw-based)

  • Tailor-made development paths to deepen your expertise

  • Cyclical initiatives that allow you to grow in other IT areas, not only your current stack

Hybrid work - 1-2/week

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