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Senior Backend Engineer

Instrumentl· Engineering
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Hybrid (Remote (US))$175k - $220kFull-timePosted 2mo ago

About the role

Senior Backend Engineer at Instrumentl, a YC-backed SaaS platform for grant discovery and management for nonprofits. Own AI features end to end, build APIs, tool-using agents, and RAG pipelines to turn frontier LLMs into grant discovery, application drafting, and research tools for 5,500+ nonprofits.

Responsibilities

  • Ship AI to production: build tool-using LLM agents, multi-step workflows, guardrails; turn prototypes into resilient services with SLAs, rollback/fallback strategies, cost and latency budgets; stand up evaluation and observability.
  • Build trustworthy backends: write high-quality, tested code across backend and data pipelines powering retrieval and evaluation; contribute to reliability practices: alerts, dashboards, incident response.
  • Collaborate and raise the bar: partner with Product/Design/GTM on scoping, UX, and measurement; run experiments (A/B, canaries); iterate; raise engineering standards through maintainable code, tests, docs, and thoughtful reviews.

Qualifications

  • 7+ years building and shipping production backend systems in Python (FastAPI, Celery, or equivalent).
  • Hands-on experience building LLM features in production: tool/function calling, multi-step agent workflows, guardrails and evals for safety/cost-effectiveness.
  • Strong data fundamentals: SQL, schema design, pipelines powering retrieval and evaluation.
  • Thrives in a fast startup with high ownership and bias for action.

Skills

Required:Python backend developmentLLM feature developmentSQL and data pipelines

Benefits

  • 100% covered health, dental, and vision insurance for employees (50% for dependents)
  • Generous PTO, including parental leave
  • 401(k)
  • Company laptop and home-office stipend
  • Bi-annual company retreats
  • Growth opportunities within Instrumentl
Last updated Oct 7, 2026. Interested? Apply on the company site.
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About Instrumentl

Instrumentl automates grant discovery and management for nonprofits.

Instrumentl is a SaaS platform that helps social enterprises discover, track and win grant funding. We force multiply the nonprofit sector's ability to deliver impact. >100% YoY growth, cash flow positive. Feel good about the work you do, join us: www.instrumentl.com/careers

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