Founding Engineer

About MangoDesk

Long-horizon RL environments

The role

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