You’re a middle-school math hawk who can smell a wrong denominator from three tabs away. You’ve taught or tutored grades 4–8 (or you’ve got the equivalent instincts and depth), you write feedback that students can actually execute, and you don’t let “close enough” sneak into anything students will learn from.
We’re building an AI-powered math content engine that ships questions, articles, and videos at scale, but we refuse to pretend scale matters if the math is wrong or the instruction is mushy. The industry loves “generate more.” We’re obsessed with “ship better.” Your job is the human quality gate that keeps thousands of students from inheriting an AI’s confident mistakes, sloppy explanations, or quietly broken rigor.
This job is rigorous QC on AI-generated middle school math content: checking correctness, logic, grade-level fit, and pedagogy; spotting conceptual traps, ambiguous wording, and misleading reasoning; and producing crisp, structured feedback so another team can fix it fast. This role is precision work with high standards, sharp eyes, and zero tolerance for mathematically incorrect or instructionally harmful content sneaking through.
You’ll sit in the content pipeline as the final line of defense before release, reviewing material delivered via spreadsheets or an internal interface and turning your judgment into actionable issue reports. If you can move quickly without getting sloppy, call out errors without writing essays, and you care more about student learning than being polite to a machine, you should apply.
Crossover's skill assessment process combines innovative AI power with decades of human research, to take the guesswork, human bias, and pointless filters out of recruiting high-performing teams.






It’s super hard to qualify—extreme quality standards ensure every single team member is at the top of their game.
Over 50% of new hires double or triple their previous pay. Why? Because that’s what the best person in the world is worth.
We don’t care where you went to school, what color your hair is, or whether we can pronounce your name. Just prove you’ve got the skills.