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. We’re scaling fast and would love for you to join us and grow alongside us 🚀 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 collaborative developer cloud, working on features that improve the overall platform experience – including Public API, Usage History, IAM & Permission Management, Secrets Management, external CI integrations, Web IDE, deployment technology, monitoring, managed services, and the core internals of customer application deployment. 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 JavaScript/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 with cloud infrastructure, ideally in a cloud-native environment Familiarity with React Experience building 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