# Senior Backend Engineer (AI Platform) at Azx

- Company: Azx
- What the company does: Tech transformation, societal shifts, and environmental disruption put enormous pressure on critical industries like energy, infrastructure, real estate, and others to adapt, pursue new growth opportunities, and optimize operations. Backed by Powerhouse Ventures.
- Company website: https://azx.io
- Type: Startups (AI role)
- Level: Senior
- Location: United States
- Work setup: Remote
- Pay: $140K to $230K base salary per year (USD)
- Posted: 2026-08-31
- Apply by: 2026-10-15
- Apply: https://jobs.ashbyhq.com/careers.azx.io/c5a511e6-e605-434d-8236-d9746df75eb2
- Page: https://www.1752.vc/careers/jobs/azx-senior-backend-engineer-ai-platform/

## About the role

Own the LLM gateway: routing, metering, budgets, guardrail composition, and provider/backend adapters across hosted and self-hosted models. Manage the retrieval and knowledge service: connectors, chunking, hybrid search and reranking, grounded answers, and the MCP surface.

## What they're looking for

- 5+ years of deep, production async Python — cancellation scopes, streaming lifecycle, and connection pooling
- Postgres as infrastructure — comfortable reasoning about MVCC, advisory locks, and vacuum discipline, with Redis/Dragonfly used (and not used) where it belongs, real distributed-systems experience, not just familiarity
- Experience shipping API surfaces other engineers build on — versioning, idempotency, error vocabularies, migration discipline, and documentation to match
- Depth in at least one of LLM gateway concern (routing, metering, guardrails, provider failover) or retrieval engineering (hybrid search, reranking, eval methodology, audit-ready RAG), with credibility on the other
- A cost accounting and evals first mindset — you've shipped a gate or harness that caught a real regression, ideally one of your own
- Production depth in some modern stack, and the aptitude to ramp quickly on unfamiliar tools

Tags: Engineering