Our mission :
Are you a motivated Software Engineer looking to make an impact by strengthening digital security and sovereignty in the public sector in Germany?
At Open-Xchange, we develop and deliver open-source communication and collaboration technologies for email and DNS security that connect millions of people worldwide.
Discover what Open-Xchange offers you :
- We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value.
- We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills
- Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture.
Your team :
As part of the cross-functional OX Public Sector team, you will help develop secure email solutions that strengthen digital sovereignty in Germany. As a Java Developer, you will enhance the encryption framework of OX App Suite, including PGP, S / MIME, and end-to-end encryption (E2EE). You will work closely with product, security, and UI colleagues to deliver a robust and user-friendly encryption experience.
Your new job :
Maintain and improve existing backend and middleware components.Design and develop new services and APIs.Contribute to email encryption features (PGP, S / MIME, and end-to-end encryption).Collaborate with security and product colleagues to deliver reliable, user-friendly solutions.Support CI / CD pipelines, containerized deployments, and system operations.Write tests, review code, and document your work.This is the tech stack you'll be working with :
Programming languages and frameworks : Java, Spring Boot, OSGiContainerization and orchestration : Docker, Kubernetes, HelmCI / CD : GitLab CI, JenkinsBuild tools : GradleDatabases : MariaDB / MySQL, RedisYour background :
Solid hands-on experience in software development, preferably in Java-based systems.Strong motivation and passion for working with the mentioned tech stack.Experience in secure communication technologies and cryptographic concepts (e.g. PGP, S / MIME, key handling, certificate chains, message signing).Experience with RESTful APIs, microservices, and distributed systems.Familiarity with end-to-end encryption concepts or architectures is a strong plus.Knowledge of email standards (SMTP, IMAP, MIME) is beneficial.Strong verbal and written communication skills in both German and English.Intrinsic motivation to take ownership and a passion for open-source technologies, thriving in a low-hierarchy environment.Comfortable working in a remote-first environment with multicultural teams across different time zones.This is what you get at Open-Xchange :
The flexibility to work 100% remotely ensures a work environment that suits you best.Flexible working hours that allow you to successfully combine your home and family responsibilities with work.Getting together in-person for workshops and fun team events.Time off to volunteer – and mental health support when you need it.We provide financial relief through corporate benefits and a subsidy for ergonomic chairs and desks.We can discuss further location-related benefits together in an initial talk.Join the team :
Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application.
Your contact person :
Reach out to Justin ( recruiting@open-xchange.com ) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.