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MercorMercorSan Francisco, CA

Full Stack Software Engineer, Agent Platform

Build and own Mercor’s agent platform across React interfaces and backend services, enabling internal users and enterprise clients. The role requires 2+ years of full-stack experience, strong JavaScript/TypeScript and React expertise, backend development skills, and a product-focused approach to usability and reliability.

130k – 500k/yr
On-site5+ YOEFullstack Engineering

About the role

Responsibilities

  • Own the agent platform across the full stack, including internal- and client-facing React interfaces and backend APIs and services orchestrating agents, workflows, and integrations.
  • Enable hundreds of internal users and dozens of enterprise clients by shipping features, reliability, and polish for daily use and live demos.
  • Build the foundational layer for new agent use cases, task formats, and client configurations.
  • Ship product features that improve internal productivity and customer-facing platform quality.
  • Translate ambiguous requirements into well-scoped technical solutions with Applied AI researchers, product, design, and operations.

Requirements

  • 2+ years of full-stack engineering experience building and shipping production software.
  • Deep proficiency in JavaScript/TypeScript, React, and Next.js, including frontend architecture, state management, and design patterns.
  • Backend experience with Python and/or Node.js, relational databases, REST APIs, and asynchronous task infrastructure.
  • Strong design sense and empathy for end users, with a high bar for usability.
  • Experience with complex, high-throughput systems, pipelines, large data volumes, or multi-tenant architectures.
  • High ownership mindset and ability to drive projects from design through delivery.
  • Strong communication skills and ability to articulate technical and product tradeoffs.

Nice-to-haves

  • Experience building agent frameworks, LLM-powered products, or human-in-the-loop AI workflows.
  • Background in design systems, developer-facing APIs, or internal platform engineering.
  • Exposure to AI tools, real-time data, or data visualization.
  • Experience at top-tier technology companies or fast-scaling startups.

Compensation and Benefits

  • Bi-annual performance bonus structure.
  • Generous equity grant vested over four years.
  • Up to $15,000 relocation bonus.
  • $10,000 proximity bonus for living within 0.5 miles of the office.
  • $1,500 monthly meal stipend.
  • Free Equinox membership.
  • $200 monthly laundry reimbursement.
  • $200 monthly personal wellness reimbursement.
  • Health, dental, and vision insurance.

Skills

JavaScriptTypeScriptReactNext.jsfrontend architecturestate managementPythonNode.jsRelational DatabasesREST APIsasync task infrastructureAgent Frameworksllm productsreal-time dataData Visualization

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