The osapiens HUB is a cloud-based platform that helps businesses manage their sustainability, compliance, and transparency efforts more easily. The HUB offers ready-made software solutions that automate compliance with environmental and social regulations, helping businesses track and improve sustainability with minimal manual effort. It's user-friendly, adaptable, and optimizes existing resources. Think of it as an all-in-one toolkit for businesses looking to operate more sustainably while keeping up with legal requirements without getting bogged down in technical or administrative hassles. This role is based in Mannheim, a vibrant tech hub at the heart of Germany, where you'll collaborate with a talented, forward-thinking team. We embrace a hybrid work model, with three days a week in the office, ensuring the perfect balance between in-person collaboration and remote flexibility. ActivitiesDesign and build scalable, reliable backend systems that power the osapiens HUB, using Java and modern technologies Develop core business logic to support enterprise-grade software solutions and solve complex real-world challenges Collaborate with cross-functional teams (engineers, product managers, designers) to create seamless, integrated end-to-end solutions Develop and maintain web services (RESTful, GraphQL) to integrate with various platforms and support clients' needs Ensure high-performance, scalable solutions that meet the growing demands of global enterprises Mentor junior engineers and promote best practices in coding, testing, and development processes RequirementsExpertise in Java/JavaEE and Spring Framework, with a deep understanding of building high-performance, scalable backend systems Familiarity with NoSQL databases like Cassandra, ScyllaDB, or similar Strong web services expertise in designing and integrating RESTful and GraphQL APIs Proficient in automated testing and CI/CD practices to ensure continuous delivery of high-quality code. Experience with distributed systems, focusing on scalability and fault tolerance Hands-on experience with search technologies like OpenSearch, Elasticsearch, or similar Proficient in Git for version control and collaborative development Agile mindset with experience working in cross-functional teams and sprints Experience with DevOps TeamJoin us for this and more...A purpose-driven mission with and for global industry pioneers in tackling complex challengesRoom for creativity through collaborative teamwork and an open communication cultureFlexibility and team bonding with our hybrid work optionsFuel for your growth journey, both personally and professionallySustainable mobility options, promoting eco-friendly commuting solutionsFun team events and outings with our global teamsInspiring workspaces in Mannheim and beyond Application ProcessStep 1: After reviewing your application, our Recruiting Team will schedule a 30-minute virtual call.Step 2: 1 hour online interview with the Head of Department.Step 3: 1 hour online interview - Pair programming exercise with Principal EngineerStep 4: 1.5 hour onsite interview - Cultural fit with HOD, Principal Engineer + CTO