Strong reasoning
You can follow complex chains of logic — and notice when one breaks.
Careers at Synthium Labs
Put your expertise to work on challenging problems in frontier AI development.
Frontier models are shaped by careful expert evaluations and datasets. We qualify and calibrate the experts who produce them: selective about who joins, and clear about how you are assessed. Roles are listed below as they open.
We select across these pools
- Generalist reasoning
- Software engineering
- Mathematics
- Science
- Finance
- Law
- Medicine
- Languages
Open roles
2 openWho we select
We care about how you think — and what you can do.
Every contributor passes a capability-specific assessment and project calibration before touching production data. It's the only way a client can trust our quality bar — and the only way your work gets the respect it deserves.
Technical ability
You've built things: code, models, analysis, systems — and you can explain how they work.
Domain depth
Deep expertise or strong aptitude in a technical or professional field — code, math, science, finance, law, medicine or languages.
Attention to detail
You notice the error everyone else skimmed past — and you double-check your own work.
Consistency
You hold a standard across hours, days and thousands of tasks — not just on your best day.
Complex rubrics
You can absorb detailed guidelines and apply them precisely, even when the instructions contradict each other on the surface.
The process
How hiring works
- 01
Apply
Submit your application through one of our open roles. It takes about 15 minutes.
- 02
Screening
We review every application against the role's capability requirements.
- 03
Capability assessment
Qualified candidates complete a role-specific assessment that looks like real work.
- 04
Interview
A conversation with our team about your approach, your interests and how you think.
- 05
Project calibration
Training on project-specific guidelines and gold-standard tasks until the bar is met.
- 06
Production eligibility
Calibration passed — you're cleared for production work, with continuous QA from here.
No open role fits you? Email us regardless — strong candidates are never turned away for applying late.
Ready to apply?
Every role starts with the same capability assessment.
No CV screen decides it. You are assessed on the work itself, then calibrated against the project before you touch production data.