Weave

Product Engineer Intern

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Weave (YC W25) – Founding Product Engineer Intern

Weave is building the definitive platform for understanding and improving how engineering teams work. We believe the way engineering output is measured today is fundamentally broken and that modern AI can give teams a far more accurate and actionable view of productivity, impact, and collaboration.

Trusted by 200+ customers including Robinhood, Rho, PostHog, and Browserbase, we've delivered consistent double-digit month-over-month revenue growth since May. We're backed by Moonfire, Burst Capital, and Y Combinator (W25) with a $4.2M seed round.

This is a rare chance to intern at a high-growth YC startup at the ground floor, not as a ticket-taker, but as a real contributor with meaningful ownership.

What You'll Work On

You'll ship real product alongside our founding team. Depending on where you're strongest and where we need you most, that could mean:

  • Talking to customers to understand their pain points
  • Designing and prototyping solutions to real product problems
  • Writing frontend or backend code for new features
  • Fixing bugs, sometimes with a clever hack, sometimes with a proper fix
  • Collecting and synthesizing customer feedback after you ship

Who We're Looking For

We don't expect you to have years of experience. We do expect a few things:

  • You're a fast learner who gets things done. When you hit a wall, you find a way through it, LLMs, the docs, asking for help, or all three.
  • You write decent code and want to write great code. The slope matters more than where you're starting from.
  • You're empathetic. Building products for engineers means thinking carefully about how other people work and what actually makes their lives better.
  • You communicate clearly. In writing, in Slack, in a PR description. Clarity is a skill we take seriously.
  • You care about the mission. If helping engineering teams work better genuinely excites you, you'll thrive here. If it doesn't, it's hard to fake.

Nice to Haves

(Don't let these stop you from applying!)

  • Familiarity with React/TypeScript, Go, or Python
  • Any prior thinking or projects around developer tools, productivity or engineering metrics
  • Passable design sensibilities, you don't need to be a designer, but caring about how things look helps

The Team You'll Work With

  • Andrew (CTO) – founding engineer at Causal, MIT alum. He's been in your shoes and is genuinely invested in mentorship and your growth.
  • Adam (CEO) – former sales executive who has scaled teams from $0–30M ARR and is deeply embedded with customers.

This is a small, intense, highly collaborative team. You'll have real ownership from day one, not busy work.

Logistics

  • In-person in San Francisco
  • Paid internship; compensation commensurate with experience
  • Covered lunches, dinners and snacks