Senior Engineer (Backend & Data)

Posted 19 Days Ago
Be an Early Applicant
Cologne, Nordrhein-Westfalen, DEU
In-Office
Senior level
Fintech • Payments • Software • Financial Services
The Role
As a Senior Engineer, you'll enhance optimization systems, build data layers, design math models, and influence architectural standards in backend and data-intensive solutions.
Summary Generated by Built In

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

Skills Required

  • 5+ years building backend or data-intensive systems in production
  • Industry experience in manufacturing, supply chain, energy or logistics
  • Hands-on with optimization, solvers or operations research
  • Strong in Typescript and deep in Python
  • Deep interest in semantic modeling, knowledge graphs, math models
  • German at C1 level or higher
  • Cologne-based or willing to relocate
Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: Cologne
7 Employees
Year Founded: 2022

What We Do

Giving businesses the ability to steer their org and make the right decisions by reengineering the root cause of inefficiencies in their systems.

Similar Jobs

Zscaler Logo Zscaler

Regional Director, Enterprise

Cloud • Information Technology • Security • Software • Cybersecurity
Easy Apply
Remote or Hybrid
Germany
8697 Employees
100K-143K Annually

Magna International Logo Magna International

Qualitätsplaner (m/w/d)

Automotive • Hardware • Robotics • Software • Transportation • Manufacturing
Hybrid
Soest, Nordrhein-Westfalen, DEU
171000 Employees

Navan Logo Navan

Consultant

Fintech • Information Technology • Payments • Productivity • Software • Travel • Automation
Easy Apply
Remote or Hybrid
Germany
3300 Employees

Samsara Logo Samsara

Sales Manager

Artificial Intelligence • Cloud • Computer Vision • Hardware • Internet of Things • Software
Easy Apply
Remote or Hybrid
Germany
4000 Employees

Similar Companies Hiring

Hanover Park Thumbnail
Artificial Intelligence • Fintech • Software • Financial Services
New York, New York
31 Employees
Kepler  Thumbnail
Fintech • Software
New York, New York
6 Employees
Onshore Thumbnail
Artificial Intelligence • Fintech • Software • Financial Services
New York, New York
60 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account