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MangoDesk

1 open role

Founding Engineer

$100k to $200k

San Francisco, CA, USFull-timeAny (new grads ok)Posted Feb 8, 2026

Against the San Francisco typical range

Job description

As a founding member of our engineering team, you’ll play a pivotal role in building the data and evaluation infrastructure that powers frontier models. Joining as one of our earliest hires, you’ll take on significant ownership - leading projects from start to finish and seeing direct and immediate impact of your work.

Company Overview

We're a YC-backed startup on a mission to bridge the gap between AI and the $5T knowledge work economy through cutting-edge data infrastructure and environments. We're a technical team with experience from Scale AI, Uber, and previously founding a successful AI company. We’re based in San Francisco, CA, and recently raised an oversubscribed seed round led by top-tier VCs.

Required Qualifications

  • Strong technical / computer science fundamentals.
  • Experience building production-grade backend / full-stack systems
  • Deep understanding of scalability challenges and good system design.
  • The ability to take ambiguous requirements, conduct research, analyze tradeoffs, and own project execution end-to-end, balancing speed vs reliability.
  • Strong communication skills and a bias toward ownership

Preferred Qualifications

  • 1+ years of experience as a SWE
  • Prior experience at startups / high-growth companies
  • Experience with applied AI / AI research - specifically in post-training / RL

Description copied from MangoDesk's careers page. Read the full posting before you apply.

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