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Senior Backend Engineer

Chai Research — United States · Posted ~3 hours ago

Senior Full-time Onsite

Skills

Backend software engineering High-scale systems Low-latency systems Distributed systems High-volume services Problem definition Technical ownership Backend services AI model infrastructure

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Summary ✨ AI‑Generated

A senior backend engineer will build and scale the services connecting a large user base with an AI model fleet, including routing, conversation state, and queuing. The role emphasizes high volume, low latency, low error rates, strong ownership, and the ability to define problems and solutions independently. The position requires working in person from an office in Palo Alto.

Highlights

High-impact backend engineering in a small, flat team, with end-to-end ownership of high-volume, low-latency services and direct responsibility for scaling infrastructure serving millions of users.

Description

About CHAI AI CHAI is a social AI platform where millions of people create, share, and talk to AI characters. As of Sep 2026, it has 10 million active users and $100 million ARR. After receiving over $55M in funding from investors such as AMD and CoreWeave, CHAI AI is actively hiring engineers to expand its team. About the team Engineering is 15–20 people with a flat structure. High impact on the product, fast iteration, and clear metrics to measure against. What you will work on Build and scale the services between 10M users and our model fleet — routing, conversation state, queuing. High volume, low latency, low error rate. You own it end to end. You might thrive in this role if you… 2+ years of software engineering experienceHigh motivation and talented.High ownership: comfortable with ambiguity, able to define the problem and the plan rather than execute a predefined spec.Able to work in person at our Palo Alto Office. Compensation and benefits Top pay AI startup in Bay Area. $477,000 – $652,000, paid 100% in cash. We benchmark against total comp at Meta, Google, and OpenAI — and pay that number in cash, not equity, with the option to trade a portion of cash for stock options. Health, 401k, unlimited PTO. Our interview process We run a fast process - an offer can be given within 7 days of first contact. 20 minute phone screen with our founder or engineer20 minute personality assessmentTake home assessment. 60-90 minutes to complete.One day onsite interview.