Senior Java Software Engineer (w/m/d)

Your mission Design, development, and maintenance of high-quality software solutions for complex distributed business applications Helping shape technical design decisions and contributing to the architecture and further development of our software platforms Developing clean, maintainable, and thoroughly tested code in accordance with modern software engineering best practices  Building secure, fault-tolerant, and high-performance services with a strong focus on reliability, maintainability, and operational excellence Optimizing application performance, resource utilization, and system responsiveness Designing robust APIs and integrating distributed systems using modern communication patterns Ensuring software quality through automated testing, code reviews, documentation, and continuous improvement Collaborating closely with product owners, architects, QA engineers, and international development teams throughout the entire software lifecycle Mentoring less experienced developers by sharing knowledge, promoting best practices, and contributing to technical excellence Staying up to date on new technologies and proactively identifying opportunities to improve our products and development processes Your profile Bachelor’s or Master’s degree in computer science, software engineering, or a related field 10+ years of professional experience in software development Excellent knowledge of Java (Java 21/25 or newer) Extensive expertise with Spring Boot, Spring Cloud, Spring Security, and the Spring ecosystem Extensive experience in the design and implementation of RESTful APIs Deep understanding of distributed systems and microservice architectures In-depth knowledge of JPA/Hibernate and relational databases; experience with NoSQL databases is a plus Solid understanding of software architecture, design patterns, and Clean Architecture principles Experience designing highly available, fault-tolerant, and maintainable enterprise applications Strong understanding of concurrency, asynchronous processing, and performance optimization Experience with CI/CD pipelines, Git, Maven/Gradle, Jenkins, GitLab CI, or similar tools Experience with automated testing, integration testing, and test-driven development (TDD) Excellent analytical skills, problem-solving abilities, and strong communication skills; fluency in spoken and written English and German Why us? Competitive salary based on qualifications Flexible work hours Work-from-home and remote options Emphasis on work-life balance Opportunities for training in new technologies Career opportunities and opportunities for professional development Innovative, modern, and friendly work environment Fully equipped, easily accessible workspace For more information, visit:  https://www.mtg.de/en/career/why-mtg/