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# Senior Engineer (Backend & Data)

- **Company:** Circonomit
- **Location:** Köln, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** C++ (Programming Language), IBM ILOG CPLEX Optimization Studio (CPLEX), Extract Transform Load (ETL), Graph Database, Python (Programming Language), TypeScript, Caching, Backend
- **Published:** May 18, 2026
- **Apply:** https://de.indeed.com/viewjob?jk=a28d60e1b3f05113

## About the Role

Do you have experience in TypeScript?, Do you have a Master's degree?, * 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



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