Senior Java Backend Developer

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: Minimum 8 years of professional experience as a Java developer, with a proven track record on long-term projects Strong hands-on experience with Spring, Spring Boot, and Hibernate Strong SQL skills, including query and performance tuning Hands-on experience with Oracle (preferred) or PostgreSQL Experience in automated testing of Java applications Clean coding skills Excellent problem-solving abilities Experience in RESTful API design Familiarity with agile development practices (Scrum, Kanban, etc.) Good communication skills and the ability to clearly state requirements to other teams (Opportunity for Poland-based candidates) Benefits: 💼 Tax-deductible costs on a contract of employment for all development roles 🔒 Stable employment based on an employment contract 🩺Private Medical & Dental care & Life Insurance 💰 Paid Referrals 🏋🏽 MyBenefit program (sports card, well-being program etc.) 🌎 Internal Mobility program - possibility of rotation between projects, locations, accounts 🎓 LuxTalent platform (webinars, training, courses)