Tech Lead / Senior Full-Stack Engineer

Details: Location: Poland Hybrid (2 days per week from the Kraków office)Contract: B2B, 12 months with possible extensionsRate: 180-220 PLN net per hour + VATTeam Context: High-performing technology team within Wholesale Credit & Lending Technology.Project Context: Part of a major 3–4 year PRA regulatory transformation programme.Countries: Plan for rollout across approximately 60 countries. Summary: The role of Tech Lead / Senior Full Stack Engineer is pivotal for the Wholesale Credit & Lending Technology team, aimed at building and implementing AI-powered solutions and modernizing core credit and lending technology platforms. Main Responsibilities: Provide technical leadership and guidance to the engineering team.Remain hands-on with Java Full Stack development.Design and contribute to scalable, enterprise-grade solutions.Bring practical experience in building or integrating AI-based capabilities into applications and platforms.Support architectural and technical decisions across the workstream.Conduct and oversee high-quality code reviews.Establish and promote modern engineering standards and development practices.Work closely with engineering managers, architects, and other technical stakeholders.Ensure solutions are pragmatic, maintainable, and scalable without unnecessary overengineering.Support the modernization and eventual decommissioning of legacy platforms, including GARM.Contribute to improvements in data quality, traceability, lineage, and governance across wholesale credit and lending models.Support the adoption of "golden source" architecture principles across multiple systems and markets. Key Requirements: Strong Java Full Stack engineering experience.Previous experience acting as a Tech Lead, Lead Developer, or technical owner.Strong database knowledge, particularly PostgreSQL / Postgres.Hands-on experience developing AI-enabled applications, features, or solutions.Understanding of how AI/LLM capabilities can be integrated into enterprise software.Strong software architecture and system design capabilities.Excellent code review skills.Progressive engineering mindset and knowledge of modern development practices.Ability to make pragmatic technical decisions in a fast-moving environment.Experience delivering scalable enterprise applications. Nice to Have: Quantexa experience.Claude / LLM ecosystem exposure.Basic DevOps knowledge.Experience within banking, lending, credit risk, or regulated environments. Advanced DevOps knowledge is not required, as there is a dedicated DevOps function.