Job Description

Working Student (m/f/d) – Backend Development (Java)

Department: osapiens Hub

Employment Type: Fixed Term - Part Time

Location: Mannheim

Reporting To: Simon Tenbeitel

Compensation: €17.00 - €22.00 / hour

About osapiens

At osapiens, more than 550 talented minds unite around one mission: enabling sustainable growth for businesses worldwide. Founded in 2018 and headquartered in Mannheim, Germany, we have built the AI-driven osapiens HUB - a multi-tenant platform hosting 26 enterprise-grade solutions designed for cross-company collaboration, automation, and compliance. With offices across Europe and the US, we are shaping the future of scalable and secure business technology.

Your Team

Our Backend Engineers (Hybrid in Mannheim · 3 days/week on-site) build the foundation of the osapiens HUB - the cloud platform powering all our SaaS products. The team develops engines for seamless monitoring, real-time data processing, centralized integration, automated workflows, and dynamic app development. Simply put: they build the core technologies that enable global companies to turn compliance into efficiency and sustainable growth.

Your Responsibilities

• Develop backend features using modern Java
• Follow industry best practices by writing automated tests and documentation for your code
• Own features end-to-end: from implementation and testing to supporting the roll-out with clear release notes
• Option to work on the frontend as well (React)

Your Experience

• Currently enrolled in a university program (computer science or related fields)
• Eagerness to grow with us long-term
• First experience in software development with object-oriented programming languages such as Java
• Preferably first experiences with backend development, ideally with Spring Boot
• Understanding of API Development and NoSQL databases are a plus
• Strong interest in building reliable, secure and scalable software
• Ability to work independently, learn quickly, and take full ownership of your tasks
• High attention to detail and drive to deliver great work

You'll be fully supported by a highly skilled team that truly values the fresh perspectives, energy, and ideas you bring—we invest in your growth and love seeing what you contribute.

Join us for this and more...

• A purpose-driven mission tackling complex sustainability challenges while working alongside global industry pioneers at a fast-growing unicorn company
• A dynamic, collaborative work environment where your ideas are valued and implemented
• Room for creativity and ownership through cross-functional teamwork and open communication
• Regular team events and outings
• A dynamic and collaborative team environment, offering both remote and in-office opportunities
• And of course – free drinks and snacks to keep you energized during your day