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Software Engineer, Fullstack

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Mercor

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Location:
United States , San Francisco

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

130000.00 - 500000.00 USD / Year
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Job Description:

We're looking for a product-oriented full-stack engineer with strong technical fundamentals and exceptional product taste. This role is ideal for someone who enjoys owning user-facing features end-to-end—from idea to production—while deeply understanding the business and marketplace dynamics behind what they're building. You'll work on core marketplace surfaces that impact how engineers discover Mercor, apply to opportunities, complete assessments, and ultimately earn income. Success in this role requires good judgment, comfort operating in ambiguity, and the ability to ship high-quality experiences quickly without over-engineering.

Job Responsibility:

  • Own product features end-to-end, from scoping and design partnership to implementation, launch, and iteration
  • Build and maintain frontend experiences in React / Next.js with strong UX judgment and attention to detail
  • Design and implement backend APIs and services in Python and Go that power marketplace workflows
  • Model and evolve data using MongoDB and SQL, balancing correctness, flexibility, and performance
  • Partner closely with Product and Design to make trade-offs between speed, quality, and long-term maintainability
  • Develop intuition for marketplace dynamics (supply, demand, incentives, trust, activation, drop-off) and reflect that in product decisions
  • Instrument features, analyze funnels, and iterate based on real user behavior
  • Raise the bar for code quality, system design, and product craftsmanship through reviews and collaboration

Requirements:

  • Strong product intuition and UX sensibility
  • Ability to reason about user behavior, incentives, and marketplace dynamics
  • Comfort making product decisions when requirements are incomplete or evolving
  • Experience building full-stack web applications in production
  • Strong frontend experience with React / Next.js
  • Backend experience with Python and/or Go, including API design and service ownership
  • Familiarity with MongoDB and relational databases (SQL) and when to use each
  • Track record of shipping features end-to-end in fast-moving environments
  • Bias toward action and ownership
  • Ability to balance speed with long-term quality and know when 'good enough' is correct
  • Clear communicator who can align technical decisions with business goals

Nice to have:

  • Experience working on marketplaces, consumer products, or growth-oriented platforms
  • Strong intuition for onboarding, activation, and funnel optimization
  • Experience working closely with designers and PMs in highly iterative product cycles
What we offer:
  • Generous equity grant vested over 4 years
  • A $20K relocation bonus (if moving to the Bay Area)
  • A $10K housing bonus (if you live within 0.5 miles of our office)
  • A $1K monthly stipend for meals
  • Free Equinox membership
  • Health insurance

Additional Information:

Job Posted:
February 21, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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