Andreessen Horowitz
Global venture capital firm investing in technology companies.
Company facts
- Founded
- 2009
- Employees
- 500
- Headquarters
- United States
- CEO
- Marc Andreessen and Ben Horowitz
- Type
- Private
- Subsidiaries
- a16z Crypto, a16z New Media
About
Andreessen Horowitz (a16z) is a venture capital firm founded in 2009 by Marc Andreessen and Ben Horowitz. It invests in technology‑focused companies at any stage—from seed to late‑stage—across sectors such as consumer, enterprise, bio/healthcare, crypto, fintech, and gaming. Leveraging a team of partners who are former founders, CEOs, and CTOs, a16z offers portfolio companies access to a deep network of technical talent, executive expertise, and industry connections. This integrated support helps entrepreneurs accelerate product development, market entry, and growth, positioning them for long‑term success.
Open positions
Founding Engineer
Founding engineer — the most senior technical hire — at Omi Health, a pet-health startup running dog longevity tests. You set technical direction and own delivery end-to-end: Python/FastAPI on Postgres/Supabase, a SwiftUI iOS app, React/TanStack web, AWS with Terraform, plus production LLM features, pet-health data modeling, and hostile integrations.
Founding ML Engineer
Founding ML engineer at Philyron (a16z Speedrun company) building predictive maintenance for commercial ships: you own the full loop end to end — satellite data ingestion (MQTT, AWS), fusing live sensor data with maintenance records, training anomaly-detection and failure-prediction models, and shipping them to production. Onsite in San Francisco; $130–150k plus ~1.5% equity.
Member of Technical Staff, Intern
At Primitive Labs our mission is to make human behavior a first-class primitive of software development. As an intern at Primitive Labs, you will build at the frontier alongside the founding team, across both research…
Member of Technical Staff, Research
At Primitive Labs our mission is to make human behavior a first-class primitive of software development. In this role, you will build the research systems behind our behavioral intelligence agents. Your work will span…
Member of Technical Staff, Founding Engineer
At Primitive Labs our mission is to make human behavior a first-class primitive of software development. As a founding engineer, you own areas of the system from design through production. Your work will span…
Forward Deployed Engineer Intern
Forward Deployed Engineer Intern San Francisco · Summer · In-person What we do We're building Infragrid to end the tax of manual financial work. We capture how businesses operate (SOPs, screen recordings, and analyst…
Software Engineer Intern
Software Engineering Intern Location: San Francisco Term: Summer Work Type: In-person About Infragrid We’re building Infragrid to end the tax of manual financial work. By capturing how businesses operate—using SOPs,…