Senior Engineer - Backend

Location: San Francisco, CA
Visa sponsorship details: Not open to any visas, this is for candidates with existing work authorization in the US or Canada
About this role
We're looking for a generalist, high-agency engineer with 5+ years of backend experience building customer-facing products. You should have startup DNA — experience at top-tier startups (Series B or earlier) or as a founder — and a product mindset that ties technical decisions to business impact. We need someone who questions the "why," drives projects end-to-end without oversight, and thrives in early-stage ambiguity with high ownership and fast iteration.
What you'll do:
· Own and ship product features end-to-end — from problem scoping through backend implementation to production
· Design and ship LLM agents that reason over large, messy, real-world organizational data, and make them reliable enough to trust
· Make key technical decisions across the product and backend — architecture, data modeling, APIs, tooling — and set the engineering quality bar
· Operate with full autonomy; in a team this small, your judgment directly shapes the product, the codebase, and the company
· Own high-risk, high-impact projects in a fire-and-forget work style with minimal hand-holding
· Shape the product direction alongside the founding team; translate customer needs into technical solutions
· Work closely with the founding team to support growing client engagements ranging from hundreds to thousands of employees
Requirements
· Must have Experience at top-​tier startups (Series B or earlier) or as a founder;​ production-​deployed software at a real company
· Must have Built and shipped customer-​facing backend products at production scale
· Must have Deep Python expertise for production backend systems
· Must have Strong backend architecture and systems design skills
· Required 5+ years of experience with focus on customer-facing products
· Required Set technical direction on ambiguous, high-impact projects end to end
· Required Generalist - not a pure infra/backend specialist; comfortable building across the product surface
· Required Proficient in API design and SQL data stores
· Required Hands-on experience building with LLMs or agentic AI systems
· Product mindset — ties technical work to business/customer impact,​ not just internal systems

Work arrangement
Yes