Software Engineer, Marketplace

Mercor

San Francisco (CA)

On-site

USD 120,000 - 160,000

Full time

14 days+

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Benefits offered by this job

Bi-annual performance bonus

Generous equity grant

$15k relocation bonus

$10K housing bonus

$1.5K monthly meal stipend

Free Equinox membership

$200 monthly laundry reimbursement

$200 monthly wellness reimbursement

Health, Dental, Vision insurance

Job summary

Mercor, based in San Francisco, is seeking a Software Engineer to join their Marketplace team. The role involves building and maintaining backend systems for candidate-job matching and various marketplace workflows. You will focus on high-performance APIs and data models central to AI advancements.

The ideal candidate will demonstrate prowess in backend development and system design, eager to contribute to a high-impact environment. This position includes generous benefits and engages directly with AI projects at a forward-thinking company.

Qualifications

Experience in building and operating reliable backend systems in production.
Strong judgment in system design, performance, and reliability.
Comfortable with high-throughput APIs and distributed systems.

Responsibilities

Own the core systems that facilitate candidate-job matching.
Develop APIs for search, eligibility, and scoring.
Create infrastructure for real-time decisioning.

Skills

Backend systems management

API development

Data modeling

System design

Distributed systems

Tools

Python

Kafka

Postgres

Redis

Elasticsearch

Kubernetes

Terraform

Job description

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