Senior Software Engineer (C++) / Platform Engineer (m/f/d)

Are you a motivated Senior C++ or Platform Engineer ready to make an impact within a multicultural environment?

At Open-Xchange, we develop and deliver open-source communication and collaboration technologies for email and DNS security that connect millions of people worldwide and enable digital sovereignty.

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:

You’ll join our platform engineering group and work on the systems that power our cloud-native product. Together with experienced engineers across development, operations, and customer-facing teams, you’ll help keep our platform reliable, performant, and ready for the future.

• Ensure the stability and reliability of our core product by maintaining and extending a moderately complex C/C++ codebase.
• Develop and refine Lua-based configuration logic and policy definitions, contributing to automation and system-wide behavior.
• Support automated cluster operations by contributing to lightweight Golang components that interact with our Kubernetes environment.
• Manage and further develop our Kubernetes setup, including Helm charts, cluster-setup tooling, and deployment workflows.
• Own and improve packaging and release engineering processes, ensuring consistent, automated, and high-quality product distribution.
• Enhance internal testing frameworks, increase coverage, and contribute to the overall reliability and quality of the system.
• Provide Level-3 engineering support, diagnose complex issues across the stack, and collaborate with operations to ensure stable cloud-hosted deployments.

Your background:

• Several years of professional experience as a software engineer with a strong C++ foundation.
• Comfortable working across multiple languages and tackling system-wide challenges.
• Practical experience with Kubernetes and cloud-native deployment models.
• Strong grasp of both architectural and operational aspects, with an understanding of real-world behavior in distributed systems.
• Strong verbal and written communication skills in 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 ( ) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.