Working Student – Backend Development, Java

osapiens

Working Student role focusing on backend development using Java for osapiens' AI-driven HUB. Collaboration with a dynamic team in a hybrid work environment in Mannheim.

Posted 4/20/2026part-timeMannheim • 🇩🇪 GermanyEntry Level💰 €17 - €22 per hourWebsite

Tech Stack

Tools & technologies

JavaNoSQLReactSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

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)

Requirements

What you’ll need

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

Benefits

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Javaobject-oriented programmingbackend developmentSpring BootAPI DevelopmentNoSQL databasesautomated testingdocumentationscalable softwarereliable software

Soft Skills

eagerness to growindependencequick learningownershipattention to detaildrive to deliver