Full Stack Developer

Full Stack Developer position in Kraków (Hybrid, 2 days in office) within the AI Markets team of Corporate & Institutional Banking Technology (CIB), working on AI-powered platforms for global institutional investors. The team is small and autonomous (4–6 engineers) with a dedicated Product Owner, part of a 350-strong global department across multiple countries.

• 5+ years of development experience with strong Java and Python skills.
• Deep understanding of SOLID, Clean Code, DDD, BDD principles.
• Experience with Spring Framework and SQL/NoSQL databases (PostgreSQL, MongoDB).
• Prior experience with microservices and event streaming technologies.
• Ability to teach, mentor, and collaborate with team members to design new solutions.
• Strong communication skills in English (written and oral).

Nice to have:

• Experience in machine learning, NLP, AI, or Data Science.
• Optional experience with Prompt Engineering, LangChain, LangGraph, Clean Architecture.

• Design, develop, and maintain modern web applications using Java, Python, and optionally JavaScript/Vue.
• Take ownership of stories from analysis to production, ensuring quality, maintainability, and performance.
• Identify and manage technical debt, balancing new features with system health.
• Pair with team members and contribute to code reviews, technical discussions, and solution design.
• Support production and troubleshoot issues; the team builds it, the team supports it.