Senior Backend Software Engineer (m/f/d)

About Codesphere

Codesphere is a Virtual Cloud Provider from Germany building the future of sovereign cloud infrastructure. Our platform gives enterprises and governments full sovereignty without giving up modern cloud capability – a vision recently validated by a series of multi-million European government tenders.

Since our founding in Karlsruhe in 2020, we’ve expanded into an international team of 60+ experts. Based in Karlsruhe and Munich and backed by top-tier investors, we are chasing a bold vision.

What you'll drive

• You own complex features end to end – from product discovery and planning through technical design, implementation, testing, and maintenance.




• You conduct code and technical design reviews, raising the bar for quality across the team.




• You mentor junior engineers and actively contribute to a culture of learning and growth.




• You shape the capabilities of our virtual cloud provider platform, working on features that improve the overall platform experience – including Deployment-Technology, ManagedService, AuthN/AuthZ, Developer-Experience, ..

What makes you a great fit

Your Profile

• Several years of professional experience in software development, ideally in web or distributed systems




• Strong proficiency in TypeScript and/or Go




• Solid understanding of SQL databases, distributed systems, and the design of APIs and microservices architectures, containerization e.g. Docker, Kubernetes




• Degree in a relevant field or comparable qualification




• Strong foundations in Computer Science fundamentals




• Professional proficiency in English, written and spoken




• Strong communication skills and a collaborative mindset




• Openness to feedback and a genuine drive to keep learning




• Structured approach to problem-solving and a curiosity for technology

What sets you apart

• Experience in building and/or operating cloud infrastructure components, ideally in a cloud-native environment e.g. message queues, SQL / NoSQL DBs




• Familiarity with React




• Experience building and/or operating monitoring and logging systems




• DevSecOps mindset and hands-on experience

What's in it for you

• 32 days of paid time off – 30 regular vacation days plus Christmas Eve and New Year's Eve off




• Meal allowance – up to 15 digital vouchers per month, adding up to over €100 net for you




• Flexibility – hybrid work setup with mobile work options and flexibility around core hours




• Steep learning curve – fast-moving environment, real ownership, and a front-row seat to scaling a company




• Job-Rad – lease a bike through us, tax-free




• Gym access – stay active on site (Karlsruhe office only)




• Employee events – from team offsites to regular get-togethers




• Company pension scheme – company-supported pension to set you up for later




• Great public transport links – both offices are within walking distance of tram and metro stops