20 beste Stellen als backend developer in köln – aktuell auf Personalsuche

Senior Engineer (Backend & Data)
Circonomit —Köln
- Vollzeit
- Microsoft Excel
- Master
- C++
Direkt bewerben
Senior PHP-Entwickler/-in
SimpleThings GmbH —Bonn
- Teilzeit
- Datenbanken
- Homeoffice-Möglichkeit
- Weiterbildungsprogramme
WEBENTWICKLER (m/w/d)
die profilschmiede GmbH & Co. KG —Köln
- Teilzeit
- JavaScript
- HTML
- Homeoffice-Möglichkeit
Senior Developer AI Systems / TypeScript / Node.js (w/m/d)
OPEN Digitalgruppe GmbH —Köln
- Vollzeit
- Vertrieb
- Master
- APIs
- Homeoffice-Möglichkeit
- Weiterbildungsprogramme
IT Application Developer (m/w/d)
Quarzwerke GmbH —Frechen
- Vollzeit
- Oracle
- DevOps
- Englisch
- Gleitzeit
- Weiterbildungsprogramme
Direkt bewerben
Senior Backend Engineer Kotlin/Spring Boot (m/w/d)
E WIE EINFACH GmbH —Köln
- Teilzeit
- Hybrides Arbeiten
- DevOps
- Englisch
- AWS
SoftwareentwicklerInnen (m/w/d)
LOWTEQ GMBH FOOTER LINKS IMPRESSUM DATENSCHUTZ —Köln
- Vollzeit
- Informatik
- Java
- SQL
- Flexible Arbeitszeiten
Werkstudent (m/w/d) IT
Aachener Siedlungs- und Wohnungsgesellschaft mbH —Köln
- Teilzeit
- ERP-Systeme
- Datenbanken
- SQL
- Homeoffice-Möglichkeit
CMS-Developer (TYPO3/TypeScript)
OPEN Digitalgruppe GmbH —Köln
- Vertrieb
- APIs
- Homeoffice-Möglichkeit
- Weiterbildungsprogramme
Softwareentwickler / Ingenieur Netzberechnung (m/w/d)
Amprion GmbH —Pulheim
- Per E-Mail
- Informatik
- DevOps
- Java
- Weiterbildungsprogramme
9 Tage
.NET/Python Software Developer | Energy Sector
Etinars —Köln
- 475 € – 500 € pro Tag
- Azure
- Master
- APIs
Direkt bewerben
Softwareentwickler (m/w/d) Cloud
Eplan —Monheim am Rhein
- Online-Bewerbung
- Azure
- Englisch
- Softwareentwicklung
- Homeoffice-Möglichkeit
Senior Backend Engineer Python (m/w/d)
Ströer SE & Co. KGaA —Köln
- Vollzeit
- Englisch
- Master
- Python
- Flexible Arbeitszeiten
- Empfehlungsprogramm
TANKED sucht Senior-PHP-Entwickler (m/w)
TANKED Sports —Köln
- Per E-Mail
- CRM-Software
TYPO3-Entwickler (w/m/d)
dotfly GmbH —Köln
- Datenbanken
- Künstliche Intelligenz
- Flexible Arbeitszeiten
Werkstudent Java Entwicklung (m/w/d)
coac GmbH —Köln
- Informatik
- Englisch
- Java
- Flexible Arbeitszeiten
Direkt bewerben
SAP ABAP Developer (m/w/d)
BA Business Advice GmbH —Köln
- Englisch
- Java
- JavaScript
- Weiterbildungsprogramme
Java Softwareentwickler - Full-Stack (m/w/d)
parcIT GmbH —Köln
- Hybrides Arbeiten
- Informatik
- Java
- Softwareentwicklung
- Flexible Arbeitszeiten
Java Developer (w/m/d)
abcfinlab GmbH —Köln
- Vollzeit
- Hybrides Arbeiten
- Java
- Datenbanken
- APIs
- Weiterbildungsprogramme
- Flexible Arbeitszeiten
Direkt bewerben
Software Entwickler - Kotlin, Spring, Keycloak (m/w/d)
REWE digital —Köln
- Online-Bewerbung
- Informatik
- Java
- Flexible Arbeitszeiten
2 Tage

Ich möchte aktuelle Job-E-Mails für Stellen als backend developer in köln erhalten

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Senior Engineer (Backend & Data)

Circonomit
Köln

Direkt bewerben

Details zur Stelle

Vollzeit

Qualifikationen

Microsoft Excel
Rust
Master
C++
Mathematikkenntnisse
SAP ERP
TypeScript
Graphdatenbanken
Python

Vollständige Stellenbeschreibung

We are building the world's decision infrastructure — the strategic twin of every industrial organization for complex combinatorial problems. We unlocked what wasn't possible before: mapping reality with its levers and constraints into a computer, then running n-dimensional optimization on critical value-chain decisions. Founded in 2022 by Dana (CEO) and Erik (CTO), we help Europe to stay strong and the German Mittelstand make good decisions between machines, people, materials, orders, and market shifts. We move fast. We ship. No patience for problems left uncomputed or unsolved.

You'll work shoulder-to-shoulder with Erik (CTO) on the foundation our customers will run on for the next decade — the data layer, the math model layer, and the infrastructure for the optimization core. We are looking for an engineer with a bias for action who can balance speed with the mid-term tech strategy and is able to take on complex challenges with independence and curiosity. Here is what you'll own:

Make optimization runs fast enough that customers iterate in minutes, not hours — across problems an order of magnitude larger than today
Build the data backbone: ingest SAP/ERP exports, Excel reality, and operator knowledge into a clean, versioned, traceable model layer
Design the math model infrastructure with our scientists that lets non-engineers compose new optimization models without ever writing solver code
Take us from single-pilot infrastructure to multi-tenant production — without losing determinism or auditability.
Set engineering standards with Erik. Be the second voice in architectural decisions. The only voice when he isn't there.

Requirements

5+ years building backend or data-intensive systems in production — distributed compute, ETL, caching, real workloads
Industry experience — you've built data or optimization systems for or inside manufacturing, supply chain, energy or logistics. Large ERP/MES exports don't scare you
Hands-on with optimization, solvers or operations research — Gurobi, CPLEX, HiGHS, OR-Tools, AIMMS or comparable. Bonus: shipped solver-heavy systems to paying users -
Strong in Typescript and deep in Python; comfortable reaching for Rust, C++ or similar when performance demands it
Deep interest in semantic modeling, knowledge graphs, math models
German at C1 level or higher, full working English
Cologne-based or willing to relocate

Benefits

Significant skin in the game through the freedom and full cycle ownership at the forefront of the technology core
Direct line to Erik and Dana; you shape architecture, you don't execute someone else's
Option of equity package (VSOP)
You can choose your own tech setup on how you develop best
Sports membership is fully covered, as we always care about health when working hard

Send us the favourite system you've built — and one decision in it you'd reverse today. Can't wait to chat!

"Hustle the day, analyse at night, reinforce something outstanding." Period.

Erik & Dana

Direkt bewerben

Erweiterte Suche

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TANKED sucht Senior-PHP-Entwickler (m/w)

TYPO3-Entwickler (w/m/d)

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SAP ABAP Developer (m/w/d)

Java Softwareentwickler - Full-Stack (m/w/d)

Java Developer (w/m/d)

Software Entwickler - Kotlin, Spring, Keycloak (m/w/d)

Ich möchte aktuelle Job-E-Mails für Stellen als backend developer in köln erhalten

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