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Mercor
San Francisco, California, United States
Source: Mercor careers · View original posting
From Mercor's posting. “We” and “our” refer to the employer.
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 our financial systems deterministic, observable, and resilient because the models that route talent are only as good as the infrastructure that pays them. In a matter of months, we've gone from moving hundreds of thousands of dollars to hundreds of millions across our platform: what used to work at $200K won't work at $200M.
The mission of the Payments group at Mercor is to be the financial and commercial backbone of the company.
We operate at the intersection of Engineering, Finance, Product, Ops, and Fraud. Our mandate is to transform payments from manual orchestration into resilient financial infrastructure.
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.
3+ years of industry experience in backend/platform engineering (or equivalent), including ownership of production systems.
Demonstrated ability to integrate with and manage third-party payment gateways (e.g., Stripe, Adyen) and/or direct banking APIs.
Understanding of financial regulations, including adherence to PCI-DSS, and the secure handling and encryption of sensitive banking and customer data.
3+ years of professional experience building around:
transactional databases like MySQL or PostgreSQL compiled languages like Go, Rust, or C++
Experience with message queues or streaming platforms (e.g., RabbitMQ, SQS, Kafka).
distributed systems frameworks like temporal, k8s, etc..
Proven ability to manage and operate production systems under significant load. This includes balancing the velocity of development with maximum reliability, evidenced by a commitment to detailed observability and sophisticated payment agents.
Comfortable working with high intensity in fast-growing, ambiguous environments. Thinks in terms of systems and strategic solutions, not just individual tickets.
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