Senior Backend Engineer - Java (m / w / d)

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.

Activities

• Design 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

Requirements

• Expertise 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

Team

Join us for this and more...

• A purpose-driven mission with and for global industry pioneers in tackling complex challenges
• Room for creativity through collaborative teamwork and an open communication culture
• Flexibility and team bonding with our hybrid work options
• Fuel for your growth journey, both personally and professionally
• Sustainable mobility options, promoting eco-friendly commuting solutions
• Fun team events and outings with our global teams
• Inspiring workspaces in Mannheim and beyond

Application Process

• Step 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 Engineer
• Step 4 : 1.5 hour onsite interview - Cultural fit with HOD, Principal Engineer + CTO