Senior Java Developer with Oracle SQL

📍 hybrid work - 3 days/week from the office Fabryczna Office Park, Krakow Project Description: We are looking for a senior Java developer to join our client's team and contribute to the development of modern, scalable back-end services. You'll be part of a collaborative team focused on clean code, agile methodologies, and delivering high-quality solutions. The client is from the investment banking industry. Responsibilities: Design, develop, and maintain scalable back-end services and APIs using Java, Spring Boot, and Spring Implement data access using Hibernate and SQL, with attention to performance and maintainability Analyze and tune SQL queries and database performance on Oracle (preferred) or PostgreSQL Define and consume RESTful APIs, clearly communicating requirements and constraints across teams Translate business and product requirements into robust technical solutions Apply clean code principles and back-end best practices across the codebase Write and maintain automated tests (unit, integration) Participate actively in agile ceremonies (Scrum/Kanban), including refinement, planning, reviews, and retrospectives Perform code reviews and contribute to continuous improvement of engineering standards and tooling Work closely with QA, product managers, and architects to ensure high-quality, business-aligned deliveries Support and improve existing applications in a fast-paced, enterprise investment-banking environment Mandatory Skills Description: At least 10 years of professional experience as a Java developer, including long-term projects Strong Core Java skills Strong hands-on experience with Spring Boot and building microservices Experience in RESTful API design Hands-on experience with PostgreSQL or Oracle, including strong SQL skills and query and performance tuning Hands-on experience with Docker and Kubernetes Experience with Microsoft Azure Good working knowledge of Unix/Linux, including shell and command-line tools Experience in automated testing of Java applications Clean coding skills Excellent problem-solving skills Familiarity with agile practices (Scrum, Kanban, etc.) Good communication skills and the ability to state requirements clearly to other teams Nice-to-Have Skills Description: - agile development methodologies - investment banking domain knowledge as a big plus - Experience with Sybase Languages: English: C1 Advanced