Senior Java Backend Engineer

Senior Java Backend Engineer

osapiens

Mannheim, Germany

Your Key Responsibilities

• Build Scalable Systems: Design and develop reliable backend systems using Java and modern technologies to power the osapiens HUB.
• Develop Core Logic: Implement business logic for enterprise-grade solutions and solve complex real-world challenges.
• Integrate Platforms: Build and maintain RESTful and GraphQL services that support seamless integrations and client needs.
• Collaborate End-to-End: Work with engineers, product managers, and designers to deliver integrated, high-quality solutions.
• Mentor & Elevate Quality: Support junior engineers and promote best practices in coding, testing, and backend development.

Your Experience

• Passion for Scalable Systems: You’re motivated by building distributed, high-performance backend systems that create real-world impact.
• Java & Spring Expertise: Strong experience with Java/JavaEE and Spring Framework, with deep knowledge of scalable backend architectures.
• Database & API Skills: Familiarity with NoSQL databases (e.g., Cassandra, ScyllaDB) and strong experience designing RESTful and GraphQL APIs.
• Quality & Reliability: Proficiency in automated testing, CI/CD practices, and building fault-tolerant distributed systems.
• Modern Engineering Toolkit: Experience with OpenSearch or Elasticsearch, solid Git skills, an agile mindset, and exposure to DevOps practices.