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Role description

Backend Engineer

222 logo222YC W23
TypeFull-time
SponsorshipNo visa sponsorship
Salary$165,000–$275,000
LocationNew York, NY
Posted9/7/2026
Engineering

222 is hiring a backend engineer

looking for someone who:

- has experience building systems from 0-1 and 1-100: both bringing a fresh concept to life and hammering out details as they automate/scale it

- designing systems & abstracting complex flows comes naturally to them

- cares deeply about the craft behind the systems they build

- enjoys high agency environments and is thoughtful about what they build & how they build it

https://serendipityproject.notion.site/backend-eng

come contribute to a complex backend system modeling one of the most interesting and impactful domains: how humans interact in the real world.

Apply on Y Combinator
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Company info

222 logo

222

the AI social facilitator for offline human to human interactions

Series AYC W23AI-product
Funding
  • Series A · Dec 24, 2025

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