Senior Backend Software Engineer (m/f/d) — Opportunihub
Job

Senior Backend Software Engineer (m/f/d)

Codesphere · Karlsruhe

At a glance

Type
Job
Organisation
Codesphere
Location
Karlsruhe
Work mode
On-site
Deadline
Rolling / not stated
Posted
22 Sep 2026

About this job

<h2>About Codesphere</h2><p style="min-height:1.5em">Codesphere is a <em>Virtual Cloud Provider</em> 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.</p><p style="min-height:1.5em">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.</p><p style="min-height:1.5em"><strong>We’re scaling fast and would love for you to join us and grow alongside us 🚀</strong></p><p style="min-height:1.5em"></p><h2>What you'll drive</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">You own complex features end to end – from product discovery and planning through technical design, implementation, testing, and maintenance.</p></li><li><p style="min-height:1.5em">You conduct code and technical design reviews, raising the bar for quality across the team.</p></li><li><p style="min-height:1.5em">You mentor junior engineers and actively contribute to a culture of learning and growth.</p></li><li><p style="min-height:1.5em">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, ..</p></li></ul><p style="min-height:1.5em"></p><h2>What makes you a great fit</h2><p style="min-height:1.5em"></p><h3>Your Profile</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Several years of professional experience in software development, ideally in web or distributed systems</p></li><li><p style="min-height:1.5em">Strong proficiency in TypeScript and/or Go</p></li><li><p style="min-height:1.5em">Solid understanding of SQL databases, distributed systems, and the design of APIs and microservices architectures, containerization e.g. Docker, Kubernetes </p></li><li><p style="min-height:1.5em">Degree in a relevant field or comparable qualification</p></li><li><p style="min-height:1.5em">Strong foundations in Computer Science fundamentals</p></li><li><p style="min-height:1.5em">Professional proficiency in English, written and spoken</p></li><li><p style="min-height:1.5em">Strong communication skills and a collaborative mindset</p></li><li><p style="min-height:1.5em">Openness to feedback and a genuine drive to keep learning</p></li><li><p style="min-height:1.5em">Structured approach to problem-solving and a curiosity for technology</p></li></ul><h3>What sets you apart</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Experience in building and/or operating cloud infrastructure components, ideally in a cloud-native environment e.g. message queues, SQL / NoSQL DBs</p></li><li><p style="min-height:1.5em">Familiarity with React</p></li><li><p style="min-height:1.5em">Experience building and/or operating monitoring and logging systems</p></li><li><p style="min-height:1.5em">DevSecOps mindset and hands-on experience</p></li></ul><p style="min-height:1.5em"></p><h2>What's in it for you</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">32 days of paid time off – <em>30 regular vacation days plus Christmas Eve and New Year's Eve off</em></p></li><li><p style="min-height:1.5em">Meal allowance – <em>up to 15 digital vouchers per month, adding up to over €100 net for you</em></p></li><li><p style="min-height:1.5em">Flexibility – <em>hybrid work setup with mobile work options and flexibility around core hours</em></p></li><li><p style="min-height:1.5em">Steep learning curve – <em>fast-moving environment, real ownership, and a front-row seat to scaling a company</em></p></li><li><p style="min-height:1.5em">Job-Rad – <em>lease a bike through us, tax-free</em></p></li><li><p style="min-height:1.5em">Gym access – <em>stay active on site (Karlsruhe office only)</em></p></li><li><p style="min-height:1.5em">Employee events – <em>from team offsites to regular get-togethers</em></p></li><li><p style="min-height:1.5em">Company pension scheme – <em>company-supported pension to set you up for later</em></p></li><li><p style="min-height:1.5em">Great public transport links – <em>both offices are within walking distance of tram and metro stops</em></p></li></ul><p>Find more <a href="https://www.arbeitnow.com/english-speaking-jobs">English Speaking Jobs in Germany</a> on Arbeitnow</a>

How to apply

  1. 1 Read the full details above and confirm you meet the eligibility criteria.
  2. 2 Prepare your documents — an updated CV, and any cover letter, proposal or certificates required.
  3. 3 Click Apply on official site to complete your application on Codesphere’s official page.
  4. 4 Submit as early as possible — many close once filled.
Apply on official site

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Frequently asked questions

How do I apply for Senior Backend Software Engineer (m/f/d)?

Review the full details and eligibility on this page, prepare your documents, then use the “Apply on official site” button to complete your application on Codesphere’s official page.

Is this opportunity remote or location-based?

This opportunity is based in Karlsruhe. Check the official listing for any relocation or on-site requirements.

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