Software Engineer, Marketplace

About Mercor

Mercor's mission is to organize human intelligence to power the AI economy. We partner with leading AI labs and enterprises to provide the human intelligence essential to AI development. Our vast talent network trains frontier AI models in the same way teachers teach students: by sharing knowledge, experience, and context that can't be captured in code alone. Today, more than 30,000 experts in our network collectively earn over $3 million a day.

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.

About the Role

As a Software Engineer on the Marketplace team, you will own the core systems that bring human intelligence to AI opportunities You'll work on search, matching, allocation, and workflow infrastructure at the heart of the marketplace, where systems deliver the world’s top experts to staff our cutting edge projects.

The problems are technically demanding and tightly coupled to business outcomes: latency, reliability, throughput, and system quality all directly affect marketplace performance.

What You'll Build

Backend services that power candidate-job matching, routing, and marketplace workflows

APIs and internal systems for search, eligibility, scoring, allocation, and fulfillment

Data models and system abstractions for a rapidly evolving labor marketplace

Infrastructure for real-time and asynchronous decisioning at high volume

Operational systems and tooling that keep product-critical workflows reliable, observable, and easy to evolve

Example Problems

Build the systems that determine which candidates are eligible for which opportunities

Design matching and allocation infrastructure that balance speed, quality, and fill rate

Improve the performance and reliability of APIs serving marketplace decisions in real time

Develop workflow engines for onboarding, vetting, routing, and placement

Design backend abstractions that let product and ML teams iterate quickly without degrading system quality

What We're Looking For

Track record of building and operating reliable backend systems in production

Strong judgment in system design, performance, reliability, and data modeling

Comfort working on high-throughput APIs, distributed systems, and asynchronous workflows

Ability to translate product and marketplace requirements into clean technical systems

High engineering standards and a bias toward simple, durable abstractions

Nice to Have

Experience with search, recommendation, matching, scheduling, or marketplace systems

Experience supporting ML-powered products or integrating model inference into production systems

Familiarity with event-driven architecture, queues, caching, and observability tooling

Why This Role

This role sits on a core decision layer of the product. Your work will directly shape how the marketplace operates: which opportunities get filled, how quickly hiring happens, and how reliably the system scales as volume and complexity increase.

Tech Stack

Python, Go, Kafka, Postgres, Redis, Elasticsearch, Kubernetes, Terraform

Benefits

Bi-annual performance bonus structure

Generous equity grant vested over 4 years

Up to $15k Relocation bonus

$10K housing bonus (if you live within 0.5 miles of our office)

$1.5K monthly stipend for meals

Free Equinox membership

$200 monthly laundry reimbursement

$200 monthly personal wellness reimbursement

Health, Dental, Vision insurance

Compensation Range: $130K - $500K