YC Startup Fellowship — Engineering Intern (3rd Year, 6-Month Program)

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Duration:

Type:

Who we’re looking for:

As an Engineering Fellow, you’ll work alongside our founding engineers and product leads on real product features, 0→1 launches, and live customer deployments across multiple SaaS products.

You’ll:

• Build and ship full-stack features using Next.js, Node.js, TypeScript, and Python
• Integrate with real APIs (Twilio, Stripe, OpenAI, Clerk, etc.)
• Write production-grade code deployed to paying users
• Collaborate with designers and founders on rapid product experiments
• Contribute to open-source and internal dev tools
• Learn directly from YC founders and mentors

Y Combinator–backed venture studio and AI R&D lab

We’ve launched products used by paying customers across the US, including:

• PowerDialer.ai

  – AI dialer for outbound sales

• JoinArena.ai

  – AI recruiter for global talent

• OpticIntellect.com

  – AI document intelligence

• OpenMic.ai

  – Voice AI platform

• HealOS.ai

  – AI medical scribe for clinicians

We build fast, ship often, and iterate directly with customers — the same way early YC startups do.

• High Ownership:

  You’ll own full product modules, not minor tickets.

• Fast Feedback Loop:

  Ship → see results → iterate, within days.

• Multi-Product Exposure:

  Work across AI, healthcare, sales, and recruiting tech.

• Founder Access:

  Learn startup building, GTM, and fundraising directly from the team.

• Prestige:

  Successful fellows receive a Founding Engineer offer or Attack Capital Fellowship Certificate recognized across YC network startups.