Senior/Staff Software Engineer
3ive is hiring a Senior/Staff Software Engineer for a remote role open to applicants in Germany. Level rates it ; you can apply on 3ive.
Level's read on this job
- On Level's scale, this software engineer role is Works on AI ●●●○: the daily work is on AI products, without building the model.
- The posting lists this role as remote.
- Tools and skills the posting cites include Claude, Cursor and Claude Code.
- Level classifies it as a lead role.
- Level lists 2 other open roles at 3ive.
AI in this 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.
How we rate this
Senior/Staff Software Engineer at 3ive rates 66 out of 100 for how much of the daily work is AI. That makes it Works on AI (AI Level 3 of 4). The level is about AI in the job, not seniority.
Works on AI. The daily work is on AI products, without building the model.
- ●●●● Builds AI80 to 100
- ●●●○ Works on AI60 to 79
- ●●○○ Uses AI40 to 59
- ●○○○ Little AI0 to 39
Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.
Prepare for this job
Built from this posting and from similar jobs on Level.
Skills and AI tools this role asks for
Also common in software engineer jobs at this level
Pay
- Typical software engineer job
- $167k
This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs
Questions you could be asked
- How do you decide when an AI agent can act on its own versus asking for approval first?
- Walk me through how you've used Claude in your day-to-day work.
- What are the limits of Cursor that you've run into, and how did you work around them?
- What's a project where you used Claude Code hands-on?
- Describe a typical day in a role like this one: which parts run through AI directly?
Adapt your resume
- List these exact terms on your resume: AI agents, Claude, Cursor, and Claude Code. An applicant tracking system matches the wording, not the idea.
- Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
- Show where AI is part of your daily process, not a one-off project. This role expects it to be a running habit.
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