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INTERNSHIP DETAILS

Working Student (f/m/d) - Backend Developer Java

CompanyIONOS EN

LocationRegensburg

Work ModeOn Site

PostedOctober 21, 2026

Internship Information

Core Responsibilities

Develop and maintain scalable microservices using Java and Spring Boot while creating user interfaces with Vue.js. Contribute to CI/CD pipelines, perform code reviews, and utilize AI tools to enhance platform stability and functionality.

Internship Type

full time

Company Size

2849

Visa Sponsorship

Language

German

Working Hours

40 hours

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About The Company

IONOS is Europe’s #1 digital partner for small and medium-sized businesses. More than six million customers across 18 markets rely on us to power their online success — from Europe to North America and worldwide. We’re the one-stop shop for digital growth: domains, hosting, websites, e-commerce, and online marketing tools — everything SMBs need to start strong and scale fast. For enterprises, our cloud solutions combine scalability with European data sovereignty, security, and compliance. Built on transparency and trust, our infrastructure helps organizations move to the cloud with confidence. Our mission: to make the digital world simple, affordable, and sovereign — for businesses of every size.

About the Role

About IONOS

At IONOS, we don't just manage servers – we shape the digital future for more than 6.2 million customers worldwide with our solutions. As Europe's leading hosting provider and a pioneer in independent cloud solutions, we are building next-generation infrastructure – from sovereign cloud architectures and high-performance GPU clusters to integrated AI automation tools.

What drives us is digital sovereignty for Europe and real impact for small and medium-sized businesses (SMBs) as well as large enterprises. We work in agile teams, rely on transparent structures, and believe that excellence and innovation only emerge through true team spirit.

Ready for your next step? Become part of IONOS and grow with us.

InterNetX is part of the IONOS Group SE and has been developing innovative solutions for domains, hosting, and encryption since 1998. As an Internet Service Provider with approximately 10 million managed domains, InterNetX is one of the top providers in the market. The heart of domain management is AutoDNS, supported by a distributed landscape of microservices, interfaces to registries, and specialized business systems operating in a 24/7 high-availability environment. To reinforce our agile development team at the Regensburg location, we are looking for a dedicated individual to actively contribute to AutoDNS – either in backend, frontend, or both areas.

Tasks

Develop and expand scalable microservices using Java and Spring Boot (partly PHP) in the areas of domain, server, and certificate management, as well as integrate external APIs.
Create user interfaces and components for the AutoDNS web platform using Vue.js and JavaScript, ensuring high usability standards.
Write unit and integration tests, review merge requests, and help shape CI/CD pipelines via GitLab and Kubernetes.
Analyze errors using logs and databases and sustainably resolve root causes.
Contribute to functional and technical enhancements (e.g., new regulatory requirements, billing, monitoring, and platform stability).
Actively use and shape modern AI tools in daily workflows (e.g., AI coding assistants for refactoring, testing, code reviews, and custom AI agents).

Qualifications

Currently enrolled in a degree program related to computer science (e.g., Computer Science, Business Informatics, Media Informatics) with the ability to work alongside your studies.
Backend experience with Java and Spring / Spring Boot, confident handling of relational databases, and basic knowledge of REST/web services.
Frontend experience with JavaScript/TypeScript and a framework such as Vue.js or React.
Basic knowledge of Git and interest in working with GitLab, Docker, Kubernetes, and CI/CD.
Curiosity about applying AI tools in daily development work and a critical mindset towards AI-generated results.
Structured, goal-oriented, and independent working style, strong team spirit, and good communication skills.
Very good written and spoken German and English skills.
Advantageous: Knowledge of Kafka, Elasticsearch, microservice architecture, database optimization, or initial experience with DNS/domain administration.

Working Hours: Flexible working hours according to the IONOS standard for working students, adapted to your lecture and examination schedules.

Benefits

Hybrid working model.
Flexible working hours through trust-based working hours.
At some locations a subsidized canteen and various free drinks.
Modern office space with very good transport connections.
Various employee discounts for activities and products.
Employee events such as summer and winter parties, as well as workshops.
Numerous training and development opportunities.
Various health offers, such as sports and health courses.

Application Note

We value diversity and welcome all applications – regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.

Key Skills

JavaSpring BootPHPVue.jsJavaScriptTypeScriptGitDockerKubernetesCI/CDMicroservicesREST APIsRelational databasesUnit testingIntegration testingAI coding assistants