Mercor is organizing human intelligence to power the AI economy. We are powering frontier research, AI benchmarks, and AI agent training at scale for the top AI labs and enterprises. Backed by General Catalyst and Menlo.
About the role
This role exists to help build the financial backbone that supports the next 1000x. We are looking for a senior engineer to help harden and scale Mercor’s payments platform.
What they're looking for
- We are seeking engineers who embody an operational mindset and system-level thinking, prioritizing reliability, correctness, and automation
- Experience & Domain Expertise: 6+ years in building scalable backend systems, with a strong preference for experience in high-stakes domains such as payments, fintech, billing, or financial infrastructure
- Backend Expertise: 3+ years of industry experience in backend/platform engineering (or equivalent), including ownership of production systems
- Payment Infrastructure Expertise: Demonstrated ability to integrate with and manage third-party payment gateways (e.g., Stripe, Adyen) and/or direct banking APIs
- Compliance and Security: Understanding of financial regulations, including adherence to PCI-DSS, and the secure handling and encryption of sensitive banking and customer data
- Technical Proficiency: 3+ years of professional experience building around:
More about this role
Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models. Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.
Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society. Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our San Francisco, NYC, or London offices.
Payments is the core infrastructure of our marketplace, not a back-office function. As our AI systems scale to evaluate, place, and compensate millions of workers across geographies, we are investing in making...
Browse similar: Startup jobs · San Francisco Bay Area