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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 is a profitable Series C company valued at $10 billion, with offices in San Francisco, New York, 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: Develop backend infrastructure enabling flexible work arrangements and payment mechanisms for the expert network. This work expands product capabilities and supports higher-quality foundational model development.
Identity & Access: Design and maintain 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 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 prevention), collaborating with engineering leads and cross-functional partners to translate operational needs into reliable services, improving security and developer ergonomics, and contributing to a fast-moving engineering organization where strong backend engineers flex across teams and high-priority initiatives.
Requirements: 2+ years building production systems at scale; experience with identity, access control, or enterprise access management is strongly preferred; ability to work with ambiguous requirements and deliver practical solutions quickly; high ownership mindset and willingness to tackle foundational problems supporting multiple business areas.
The role offers significant impact on core platform systems, breadth across backend infrastructure, identity, security, and internal tooling, and growth opportunities with substantial ownership and exposure to increasingly critical technical challenges.
