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← Baselayer

Senior AI Engineer, Agentic Data Enrichment

Baselayer
Location
San Francisco, California
Posted
19 days ago
Department
Engineering
Salary
$230,000 – $340,000
What they actually want (must-haves)
  • Shipped LLM-driven agents to production
  • Strong async Python including structured-data libraries, modern web frameworks, and relational databases
  • Experience across multiple frontier LLM providers and at least one agent framework
  • Built or maintained eval methodology: curated golden datasets, scoring functions, labelling guidelines, regression diagnostics
  • Browser automation experience: headless browsers, anti-bot evasion, authenticated flows
  • Holds informed opinions on structured-output reliability
Nice to have
  • Web scraping at scale: anti-bot evasion, residential proxies, request fingerprinting, authenticated flows, CDN defeats
  • Eval-framework experience (e.g., LangSmith, Braintrust, Evals, or custom)
  • Entity resolution / record linkage / fuzzy matching at scale
  • Browser-automation experience at the devtools-protocol level
  • Built a tool registry or toolset abstraction over multiple LLM providers
What the job really is

As a Senior AI Engineer at Baselayer, you will be responsible for developing and maintaining systems that classify businesses, verify their online presence, and link individuals to these businesses using web evidence. You will work with LLM-driven agents to enhance data enrichment processes, focusing on real-time entity resolution and risk scoring. This role involves significant ownership of the technical infrastructure and collaboration within a small, agile team.

Benefits
  • Flexible PTO
  • Competitive compensation with equity
  • 100% coverage of health, dental, and vision premiums
  • 401(k) with company match
  • HSA contributions included
  • $250 monthly gym stipend
Things to weigh
  • Hybrid work model with 4 days in the office
  • High salary range but no specific mention of bonuses or raises
  • Focus on foundational infrastructure which may involve complex challenges
  • Fast-paced environment with ownership and velocity, which may not suit everyone
Job score4.6/5
Benefits4/5
Freshness4/5
Career value5/5
Role clarity5/5
Pay transparency5/5

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