Dear Consultant,We are seeking a Principal Full-Stack Java Developer with strong backend and database engineering experience. You will design and build cloud-native applications, support data modelling, manage database structures, and collaborate with distributed teams to deliver high-performance systems.This is a hands-on technical role with strong emphasis on full-stack engineering, backend development, and SQL/data optimisation.Send CV to ([email protected]) if you are interested. Location: Lipski / Mazowieckie, Poland (Hybrid) Contract: 12-month B2BCVs with photographs requiredKey Responsibilities(Note: Responsibilities mirror the Cloud Native Lead role, but at a full-stack ownership level)Application Development Build and enhance full-stack applications using Java, Go, Python Develop cloud-ready microservices and backend systems Work with GCP SDKs and cloud components Database Architecture & Development Design and create database structures, tables, relationships Build stored procedures, views, functions Perform SQL optimisation and complex DB programming Support data migration, ETL/Import/Export activities Database Operations & Security Perform database admin tasks: security, backups, optimisation Ensure regulatory compliance for sensitive data Support disaster recovery preparation Team Collaboration Work with engineers, architects, UI/UX teams and stakeholders Translate business data needs into technical solutions Communicate database and backend logic effectively Required Skills & Experience Strong experience in Java, Python, Go Experience building cloud-native applications Strong SQL/database development experience MySQL, PostgreSQL, Oracle, or SQL Server Experience with microservices architecture GCP experience preferred Strong analytical, problem-solving and communication abilities