Software Engineer - Backend (Java)

Software Engineer - Backend (Java)

osapiens

Mannheim, Germany

Your Key Responsibilities

• Design & Develop: Build and implement Java-based enterprise software with a strong focus on backend architecture and scalable system design;
• Own Features: Take full ownership of features from concept to delivery and ongoing support;
• Shape Architecture: Contribute to architectural decisions, technical discussions, and design planning in an agile environment;
• Mentor & Review: Support junior developers and conduct peer code reviews to uphold high-quality coding standards;
• Collaborate & Grow: Work closely within an agile development team, learning from senior engineers and continuously growing your technical and professional skill set.

Your Experience

• Passion for Platform Engineering: You’re excited about building scalable, distributed backend systems that create real-world impact for global companies;
• Java Expertise: Solid experience with Java or JavaEE, ideally with Spring or Spring Boot frameworks;
• Database Skills: Proficiency with relational and/or NoSQL databases such as PostgreSQL, MongoDB, or Cassandra;
• API Development: Strong experience building and integrating RESTful and/or SOAP web services;
• Test Automation: Experience implementing and maintaining automated tests (unit, integration, end-to-end);
• Distributed Systems Knowledge: Understanding of common challenges such as scalability, consistency, and availability;
• Modern Engineering Practices: Familiarity with Git and a collaborative, agile mindset;
• Bonus Skills: Hands-on experience with search and analytics engines like OpenSearch or Elasticsearch is a plus.