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Careers.Azx.Io

Senior Backend Engineer (AI Platform)

Who can apply: US-based role. The employer has not said which states are eligible — confirm before applying.
Location as listed by the employer: “United States”
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About this role

Careers.Azx.Io is hiring for a Senior Backend Engineer (AI Platform) role (full-time). See the official posting for full details.

Requirements

  • 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
  • Practical familiarity with our core stack — Python 3.12+ (async, type-strict, FastAPI/Starlette, Pydantic v2), asyncpg/SQLAlchemy, Postgres (incl. pgvector), and Redis/Dragonfly with Lua — with willingness to research i…
  • Exposure to the surrounding ecosystem: OpenTelemetry (incl. GenAI conventions), SSE/streaming lifecycles, OpenAI/Anthropic provider APIs, job frameworks (Celery/Dramatiq/Prefect-class), rate-limit algorithms (token buck…

Summarized from the employer's posting — check the full posting for every requirement.