Senior Java Developer with Oracle SQL

Luxoft; Kraków; On-site; PLN 180,000 - 260,000; Full time

Job summary

Luxoft Germany is seeking a senior Java developer to join a client in the investment banking sector in Kraków. You will contribute to back-end services, APIs, and data access layers using Java, Spring Boot, Hibernate, and SQL, with a focus on performance and maintainability.

You will translate business requirements into robust technical solutions, adhere to clean code practices, and participate in Scrum/Kanban ceremonies while ensuring high-quality deliveries in a fast-paced environment.

Qualifications

• 8+ years of professional Java development experience on long-term projects.
• Proven hands-on experience with Spring, Spring Boot, and Hibernate.
• Strong SQL skills with performance tuning; Oracle or PostgreSQL experience is preferred.

Responsibilities

• Design, develop, and maintain scalable back-end services and APIs using Java and Spring Boot.
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Skills

Java

Spring / Spring Boot

Hibernate

SQL

RESTful API design

Automated testing

Agile methodologies

Problem-solving

Communication

Tools

Spring Framework

Oracle

PostgreSQL

Job description

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 SpringImplement data access using Hibernate and SQL, with attention to performance and maintainabilityAnalyze and tune SQL queries and database performance on Oracle (preferred) or PostgreSQLDefine and consume RESTful APIs, clearly communicating requirements and constraints across teamsTranslate business and product requirements into robust technical solutionsApply clean code principles and back-end best practices across the codebaseWrite and maintain automated tests (unit, integration)Participate actively in agile ceremonies (Scrum/Kanban), including refinement, planning, reviews, and retrospectivesPerform code reviews and contribute to continuous improvement of engineering standards and toolingWork closely with QA, product managers, and architects to ensure high-quality, business-aligned deliveriesSupport and improve existing applications in a fast-paced, enterprise investment-banking environment

SKILLS

Must have

• Minimum 8 years of professional experience as a Java developer, with a proven track record on long-term projectsStrong hands-on experience with Spring, Spring Boot, and HibernateStrong SQL skills, including query and performance tuningHands-on experience with Oracle (preferred) or PostgreSQLExperience in automated testing of Java applicationsClean coding skillsExcellent problem-solving abilitiesExperience in RESTful API designFamiliarity with agile development practices (Scrum, Kanban, etc.)Good communication skills and the ability to clearly state requirements to other teams

Nice to have

- agile development methodologies- investment banking domain knowledge as a big plus