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Mercor is an AI data company on a mission to organize human intelligence to power the AI economy. The company operates a platform connecting millions of domain experts who train frontier AI models, earning over $4 million per day collectively. Mercor also serves Fortune 500 enterprises through Mercor Enterprise, helping capture expert workflows and translate them into AI agents. The company is profitable, Series C funded, valued at $10 billion, and operates in-person five days a week from offices in San Francisco, NYC, and London.
As a Backend Engineer on the Platform team, you will build core systems that make Mercor's operations secure, reliable, and scalable. The role focuses on two critical areas: Contracts and Identity & Access. In Contracts, you'll develop backend infrastructure enabling flexible work arrangements and payment for the expert network while supporting higher-quality foundational model development. In Identity & Access, you'll design systems that provision and deprovision access just-in-time, ensuring experts can securely perform diverse tasks across the platform.
You'll own foundational systems at the heart of Mercor's platform, requiring strong ownership, sound architectural judgment, and a focus on security and reliability. This is ideal for a generalist backend engineer who enjoys building core systems end-to-end. Experience with identity systems or enterprise access management is a strong plus.
Key responsibilities include developing robust infrastructure for platform operations (contracts, payouts, fraud detection), working closely with engineering leads and cross-functional partners to translate operational needs into reliable services, improving security and reliability across platform systems, and contributing to a fast-moving engineering organization where strong backend engineers flex across teams and high-priority initiatives.
The ideal candidate has 2+ years building production systems at scale, experience with identity/access control/enterprise access management (preferred), ability to work across ambiguous requirements and deliver practical solutions quickly, and a high ownership mindset focused on foundational problems supporting multiple business areas.
