Backend Engineer (LLM Infrastructure)

Location: Remote within the United States; must be authorized to work in the US full-time. Travel to the Seattle area is required for the final interview, with company summits twice per year.

Compensation: $140K–$225K annually, plus equity and bonus eligibility.

Company

hirify.global is a profitable public benefit corporation founded in 2024 that develops physics-informed ML and enterprise AI solutions for climate, sustainability, energy, real estate, logistics, and utilities.

What you will do

• Own the LLM gateway, including model routing, usage metering, budgets, guardrails, and hosted or self-hosted provider adapters.
• Develop retrieval and knowledge services with connectors, chunking, hybrid search, reranking, grounded answers, and an MCP interface.
• Build evaluation infrastructure with confidence intervals and per-segment regression analysis.
• Own the asynchronous framework, public API, rate-limiting algorithms, administration tools, and its evolution toward durable agent execution.
• Design authorization across the platform, including token hierarchies, capability grammars, and tested tenant isolation.
• Ship observability, evaluations, traces, cost accounting, and operational dashboards for every feature.

Requirements

• 5+ years of deep production experience with asynchronous Python, including cancellation scopes, streaming lifecycles, and connection pooling.
• Strong production experience with Postgres infrastructure, MVCC, advisory locks, vacuum discipline, Redis or Dragonfly, and distributed systems.
• Experience designing API surfaces used by other engineers, including versioning, idempotency, error vocabularies, migrations, and documentation.
• Depth in either LLM gateway engineering or retrieval engineering, with working credibility in the other area.
• Practical experience with Python, FastAPI or Starlette, Pydantic, asyncpg or SQLAlchemy, Postgres with pgvector, and Redis or Dragonfly with Lua.
• Current authorization to work full-time in the United States is required; hirify.global cannot sponsor or take over employment visa sponsorship.

Nice to have

• Experience in energy, real estate, utilities, climate, or related industries.
• Experience in both startup and enterprise environments.
• Exposure to OpenTelemetry GenAI conventions, SSE, OpenAI or Anthropic APIs, job frameworks, rate-limit algorithms, and integer-cents money handling.

Culture & Benefits

• Fully remote work culture with a cluster of teammates in Seattle.
• Health insurance with meaningful dependent coverage.
• Flexible paid time off.
• Equity and bonus eligibility.
• Work on AI transformation for critical industries and climate-related challenges.

Hiring process

• Final interviews take place in the Seattle area, requiring travel.
• Company summits require travel twice per year.
• Applicants may apply to a maximum of two roles within a six-month period.