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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 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.

Responsibilities

Build backend services that power candidate-job matching, routing, and marketplace workflows.
Develop APIs and internal systems for search, eligibility, scoring, allocation, and fulfillment.
Create data models and system abstractions for a rapidly evolving labor marketplace.
Implement infrastructure for real-time and asynchronous decisioning at high volume.
Build operational systems and tooling that keep product-critical workflows reliable, observable, and easy to evolve.
Build 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.

Requirements

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.

Skills

Python
Go
Kafka
Postgres
Redis
Elasticsearch
Kubernetes
Terraform
Search
Recommendation
Matching
Scheduling
Marketplace systems
ML-powered products
Model inference
Event-driven architecture
Queues
Caching
Observability tooling

Location

San Francisco
NYC
London

Work Type

In-person five days a week

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

About the Company

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.