Senior Engineer; Backend & Data

Stellenbezeichnung: Senior Engineer (Backend & Data) 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:ResponsibilitiesMake optimization runs fast enough that customers iterate in minutes, not hours — across problems an order of magnitude larger than todayBuild the data backbone: ingest SAP/ERP exports, Excel reality, and operator knowledge into a clean, versioned, traceable model layerDesign the math model infrastructure with our scientists that lets non‑engineers compose new optimization models without ever writing solver codeTake us from single‑pilot infrastructure to multi‑tenant production — without losing determinism or auditabilitySet engineering standards with Erik. Be the second voice in architectural decisions. The only voice when he isn't thereQualifications5+ years building backend or data‑intensive systems in production — distributed compute, ETL, caching, real workloadsIndustry experience — you've built data or optimization systems for or inside manufacturing, supply chain, energy or logistics. Large ERP/MES exports don't scare youHands‑on with optimization, solvers or operations research — Gurobi, CPLEX, HiGHS, OR‑Tools, AIMMS or comparable. Bonus: shipped solver‑heavy systems to paying usersStrong in Typescript and deep in Python; comfortable reaching for Rust, C++ or similar when performance demands itDeep interest in semantic modeling, knowledge graphs, math modelsGerman at C1 level or higher, full working EnglishCologne‑based or willing to relocateBenefitsSignificant skin in the game through the freedom and full cycle ownership at the forefront of the technology coreDirect line to Erik and Dana; you shape architecture, you don't execute someone else'sOption of equity package (VSOP)You can choose your own tech setup on how you develop bestSports membership is fully covered, as we always care about health when working hardSend us the favourite system you've built — and one decision in it you'd reverse today. Can't wait to chat!#J-18808-Ljbffr