3Ive

Senior/Staff Software Engineer

Germany remote Mid Salary not listed
remote Mid level Technology & IT Curated
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About the role

YOUR MISSION
 
A software engineer today uses Claude Code or Cursor. A mechanical engineer designing the next jet engine still searches Excel sheets and asks whoever has been around longest.
 
We are building the AI co-engineer for physical products: one that works natively in 3D and learns from real engineering decisions. We are in production with major European manufacturers, with real revenue and customers who tell us when we are slow.
 
The problems are open ones. Getting an agent to reason usefully about geometry, making 3D search work on real customer part libraries, and figuring out what the interface even looks like when an engineer asks why a bracket failed. There is research to borrow from and very little product to copy.
 
Senior or staff level depending on experience.
 
WHAT YOU'LL WORK ON
 
You will own large problems end to end, across the stack. We cannot say exactly what that looks like in month three, but here is what the last two years have actually involved.
 
A multi-agent orchestration SDK, built from scratch. Nothing off the shelf handled what we needed: long-horizon execution that runs for hours and survives restarts.

CAD conversion as a real pipeline. It used to be manual and brittle. Turning it into production infrastructure meant writing a Python wrapper around a C++ SDK and making it reliable enough to sit under everything else.

Migrating the application off Electron and Webpack onto SSR React with Vite. That architecture is what the whole product now sits on.

 
What is coming:
 
3D-to-3D search across real customer part libraries, not benchmark datasets

Constraint solvers and optimization, and getting an agent to use one sensibly

Agents that hold a useful model of a physical object, which is still an open problem

Hybrid cloud deployments for manufacturers who cannot send their data anywhere

 
We work in Python and TypeScript, with multi-agent orchestration and AI integrations across several providers.
 
WHAT WE CARE ABOUT
 
You have shipped production systems across frontend and backend, and can point at them

Your CV reads as a set of problems, not a stack

You use AI heavily to go faster, but you built things the hard way first

You are fine when the problem is not yet defined

You deliver end to end, and you are still there when it needs maintaining

 
Bonus: CAD, computational geometry, constraint solving or optimization, 3D, LLM agents, industrial software. None required.
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Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Mid
Technology & IT Excel Javascript Python Writing Mid level remote

Likely questions

  1. Tell us about work you have done that is close to the Senior/Staff Software Engineer role.
  2. How would you approach your first 30 days at 3Ive?
  3. Which of Excel, Javascript and Python have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you stay organised and communicate clearly when working remotely?

Prepare before the call

  • A recent example that proves your experience with Excel, Javascript and Python.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior/Staff Software Engineer role because I can bring practical experience in Excel, Javascript and Python, learn the team quickly, and contribute to the outcomes 3Ive needs from this hire.

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