About this opportunity
Seer lists this Senior Software Engineer opportunity in san francisco, California. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Senior / Staff Backend & Platform Engineer - Early-stage AI startup (San Francisco / Bay Area - hybrid)
The company
A small, well-funded AI infrastructure startup in San Francisco, backed by some of the best investors in the Valley. We build the core platform and data infrastructure underneath an AI product that's used right across whole organisations and it's already in the hands of real customers. You'd join as one of the early engineers, with unusually direct ownership over what gets built and how.
What you'll do
Design, build and ship scalable backend and platform systems from the ground up
Build the data and agent infrastructure that lets LLMs reason over large, messy, real-world datasets
Own the architecture
Move fast in an early-stage environment where you're trusted to make the calls
Who we're looking for
We're after a seasoned platform engineer, someone who's built serious data infrastructure at scale and wants to do the defining early work at a company this size.
3+ years building backend and data-platform systems, including time at companies operating at genuinely massive data scale
Has led a data or ML platform, owning the architecture and long-term direction, not just implementing tickets
Deep data-infrastructure chops: data architecture, storage and execution engines, lakehouse-style migrations, and internal tooling/DSLs that make ML experimentation faster and cheaper
Strong in Python and cloud infra; fluent with databases, data modelling and API design
Bonus: hands‑on with LLMs, agentic frameworks or RAG
Why it's worth a look
Founding-level ownership and influence at a genuinely early stage
Competitive salary and meaningful equity
Full health cover (medical, dental, vision), wellness/fitness membership, transport stipend, meals on office days
Flexible time off; SF-based with hybrid flexibility
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Worksite address
san francisco, CA, 94199, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.