N
NpvProduct Engineer, Backend (Rust)
remotemid$80K – $150K
via Ashby
About this role
We're looking for a Product Engineer, Backend (Rust) to join White Circle, an AI Safety company building the policy enforcement and optimization layer for AI systems. Backed by $11M from senior leaders at OpenAI, Anthropic, HuggingFace, Mistral, and DeepMind, White Circle processes 100M+ API calls monthly and runs its own LLMs in production.
You will
- Design and build Rust backend services handling real-time policy checks at scale.
- Own features end-to-end – API design, schema, deployment, monitoring.
- Improve performance and reliability through connection pooling, caching, query optimization, and observability.
- Collaborate directly with product and research.
Requirements
- Production experience with Rust, Python, or Go.…
What we'd score you on
reqspace match rubricFive dimensions, recruiter-grade. Upload your resume and we'll generate a written explanation of where you fit and where the gaps are.
1
Skills match
For this role: python, rust, actix, postgresql, redis…
2
Level fit
This role is mid-level. We check your trajectory against it.
3
Domain experience
Your work in the role's domain matters more than your years total. We weight recent and direct experience.
4
Recency
A skill you used last quarter weighs more than one from five years ago. We grade on recency, not lifetime.
5
Location fit
This role is remote-eligible — we factor in your stated location and time-zone overlap.
Score yourself on this role.
Free · no card · written explanation included
Skills in this role
Pulled from the job description. These are the keywords we'll weight when scoring your fit.
pythonrustactixpostgresqlredisclickhousekafkahuggingfaceopenaianthropicmistral