Product Engineer

Variance•San Francisco, CA

16d•Onsite

About The Position

At Variance, we are teaching machines to make the hardest judgement calls at scale. That means building AI agents for the high-precision gray-area of stopping fraud, scams, and abuse. We’re a small, talent-dense team in San Francisco, tackling problems that touch billions of events and entities. Our customers include several Fortune 500s and global marketplaces and we're scaling to free millions of hours of human effort. If you thrive on extreme ownership, moving fast, and working directly with founders, you’ll feel at home here. You’re a fit if you: Care deeply about craftsmanship and have strong opinions about your work After familiar with our tech stack: React/Next.js, Typescript, MySQL, and ClickHouse for agent context but we value strong fundamentals over any specific technology. Thrive on owning features end-to-end, from backend to polished UI to production Are thrilled by the prospect of building AI interfaces being used to literally save lives

Requirements

Care deeply about craftsmanship and have strong opinions about your work
Familiar with our tech stack: React/Next.js, Typescript, MySQL, and ClickHouse for agent context but we value strong fundamentals over any specific technology.
Thrive on owning features end-to-end, from backend to polished UI to production
Are thrilled by the prospect of building AI interfaces being used to literally save lives

Responsibilities

Ship features end-to-end with iteration cycles measured in hours, not quarters
Scale our product into new industries and workflows through fast pilots and live demos
Work directly with the founders on massive-scale, frontier problems
Design systems where AI must decide in real time, balancing precision, speed, and user trust.