Posted on:February 9, 2026

Founding Engineer at MangoDesk

MangoDesk is hiring a Founding Engineer in San Francisco, CA, US. On-site.

About MangoDesk

MangoDesk builds data infrastructure and environments to accelerate the creation of custom evals and post-training data for AI systems. The company aims to bridge AI with the knowledge work economy.

Founding Engineer job description

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

  • 2+ years of experience as a SWE

  • Prior experience at startups / high-growth companies

  • Experience with applied AI / AI research - specifically in post-training / RL

Apply now

Applications go straight to MangoDesk. We never sit between you and the employer.

Apply now ↗
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