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

Permanent employee, Full or part-time · Italy, Austria, Finland, France, Netherlands, Germany, Spain

Our mission:
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.
Your new job:
  • 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 (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.
Your application!
We appreciate your interest in Open-Xchange. Please fill in the following short form. Should you have any difficulties in uploading your files, please contact us by mail at recruiting@open-xchange.com.
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