Backend developer Jobs in Köln
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Backend developer • koln
Backend Go Developer (Middle - Senior)
AtmosCologne, North Rhine-Westphalia, Germany- Gesponsert
C# Backend Developer (m / f / d)
Optimus SearchKöln, GermanyBACKEND.NET / C# DEVELOPER
Cluster ReplyKölnBackend Developer (m / w / d) - PHP / MySQL & KI-gesteuerte Entwicklung
StillfrontCologne(Senior) C# .NET Backend Software Developer / Engineer (m / w / d)
Sopra SteriaKöln, DESenior Backend Developer (w / m / d)
SCALARA GmbHBrühl, Nordrhein-Westfalen, DEBackend Developer / Engineer - IoT & Data (m / w / d)
ENTENDIX GmbHCologne, North Rhine-Westphalia, GermanySenior Software Developer node.js (m / w / d)
team neustaKöln, DEPHP Developer Magento (w / m / d)
brandung GmbH & Co. KGKöln, Nordrhein-Westfalen, Germany- Gesponsert
Senior Software Developer Web developer backend (mfd)
DokuMe GmbHCologne, North Rhine-Westphalia, GermanyBackend Developer Java (m / w / d) mit TypeScript Erfahrung
meinestadt.de GmbHKöln, Nordrhein-Westfalen, DEFrontend Angular Developer (Freelance)
JoinMyTripCologne, North Rhine-Westphalia, GermanyFrontend Developer_in (w / m / d) Energy Trading
Next Kraftwerke GmbHKöln, Nordrhein-Westfalen, DeutschlandBackend Developer Java
Cofinpro AGKöln, Deutschland- Gesponsert
Software Engineering (m / w / d)
SAE Institute KölnKöln, Nordrhein-Westfalen, DeutschlandBackend Developer (all genders)
Almato AGKöln, Nordrhein-Westfalen, DeutschlandSoftwareentwickler / Backend Developer (m / w / d)
rhenagKöln, DE- Gesponsert
Senior Backend Engineer (mfd)
Redcare PharmacyCologne, North Rhine-Westphalia, GermanySenior Backend Engineer
SumupCologne, GermanyBackend Go Developer (Middle - Senior)
AtmosCologne, North Rhine-Westphalia, Germany- Quick Apply
Become part of something bigger than code.
We’re building a marketing AI platform that redefines how companies work. You’ll develop scalable gRPC microservices in Go that power our AI engine — and we’re looking for someone who doesn’t need a to-do list to get started.
Aufgaben
What you'll do :
- Build performant backend services in Go
- Work with PostgreSQL , Redis , RabbitMQ , Docker
- Design and ship GRPC APIs for our AI-driven infrastructure
- Think in systems, not just functions
- Contribute ideas, not just code
Qualifikation
What we expect :
2 years)
Benefits
🎁 Benefits at Atmos
🏢 Hybrid work setup
Enjoy the best of both worlds — focused office time in Cologne, flexibility when it counts.
⏱ Flexible working hours
We care about outcomes, not hours. No rigid schedules.
🚀 High-impact work
You're not shipping tickets — you're shaping the future of marketing.
🧠 Startup energy, no chaos
Clear roadmap. Real ownership. No pointless meetings.
🧩 Autonomy & trust
No micromanagement. You get space, responsibility, and influence.
📚 Real learning curve
Work with cutting-edge tech and a team that challenges and supports you.
🪜 No dead ends
As Atmos scales, your role and impact grow with it.
📈 Be part of something big
We’re not building just another tool — we’re replacing entire marketing teams.
At Atmos, we're not just building tools — we're engineering a new way of doing marketing. AI-driven, fully integrated, and radically efficient. We're looking for people who think big, move fast, and don’t wait to be told what to do.