Member of Technical Staff, Agent Product

Mercor
San Francisco, CA
On-site

Who this role is best for

Best suited to detail-oriented engineers with a passion for user experience working in AI agent development.

Best fit for

  • Engineers who thrive in high-pressure environments and prioritize user experience in agent design
    — “You think taste cannot be delegated to an agent”
  • Individuals who enjoy solving novel problems at the intersection of AI and real-world workflows
    — “We’re solving problems few companies have encountered”
  • Candidates who are comfortable with rapid iteration and have a strong sense of ownership over their work
    — “You’ll have the opportunity to do consequential work alongside talented colleagues”

Things to consider

  • Requires a full-time commitment with five days per week on-site in San Francisco
    — “We work in person five days a week in San Francisco”

How to stand out

  • Highlight experience with designing user-facing AI tools and attention to detail in UI/UX
    — “What colors should we use for the status dot to signal”
  • Showcase projects where you invented new user experiences or interaction models
    — “You can invent new experiences that don’t have analogs”
  • Demonstrate your ability to work under tight deadlines and deliver high-quality results
    — “You are comfortable with tight deadlines”
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • developed scalable web applications
  • optimized database queries
  • implemented robust backend services
Typical background
software engineeringfull-stack development

Skills & requirements

Required

Full-stack DevelopmentWeb DevelopmentUser Interface DesignAPI DevelopmentDatabase Management

Preferred

AI ToolsEmerging Technologies

Stack & domain

Detail-obsessed PerfectionistComfortable With Tight DeadlinesInvent New ExperiencesBelief In Diffusion Of AgentsWriting Is ThinkingQuality And SpeedFreedom And ResponsibilityRuthlessly Outcomes-orientedThink In SystemsAIHuman ExpertiseReal-world Application

About the role

Original posting from Mercor via Ashby

ABOUT MERCOR

Mercor’s mission is to organize human intelligence for the AI economy. We build the infrastructure that enables frontier AI labs and enterprises to train, evaluate, and improve AI on real-world professional work. More than five million experts have joined our network, and we pay out over $5 million daily for their knowledge and expertise.

We built our training and evaluation infrastructure alongside the world’s leading AI labs. Now, we’re bringing those capabilities to enterprises across industries, enabling them to train, evaluate, and improve AI using their own expertise and standards. Our APEX benchmarks measure how AI performs on economically valuable work, while our enterprise evaluations and post-training capabilities turn those insights into measurable improvements across real-world workflows.

Our work sits at the intersection of frontier AI, human expertise, and real-world application. We’re solving problems few companies have encountered, with the opportunity to influence what the world’s most advanced AI systems become capable of doing. We’re looking for people who bring different perspectives, take ownership, exercise sound judgment, and hold themselves to an exceptionally high standard. You’ll have the opportunity to do consequential work alongside talented colleagues who challenge one another, collaborate openly, and share a commitment to excellence.

Mercor is profitable and recently raised a $750 million Series D at a $20 billion valuation. We work in person five days a week in San Francisco, New York, and London.

ABOUT THE ROLE

We think knowledge workers will need agents that are powerful (same access you have), proactive (do it before you ask it), and personalized (continually learn about you).

We built Indigo, an agent designed to be your coworker. Indigo powers both our internal AI tools and our enterprise agent deployments. You, your colleagues and thousands of customers will spend hours each day on Indigo. Through Slack, the web, or text, Indigo will help them brainstorm, plan, and deliver.

We are looking for engineers who are excited to make agents that help people to achieve more .

WHAT YOU’LL WORK ON

Making a magical experience is really about getting a thousand tiny details right:

  • What colors should we use for the status dot to signal “done and unread” vs. “waiting on input”?
  • How can we copy the shortcut mappings people are used to on Claude Code when many shortcuts are already repurposed by the browser?
  • What happens if users split out 64 panes? What happens if they upload 100 files?
  • How much of the thinking trace do people actually want to see?
  • Should sending new chat messages automatically scroll the active window down?
  • Do chat sidebars scale to agent swarms? What happens when people have 50 parallel agents?

WHAT WE’RE LOOKING FOR

  • Detail-obsessed perfectionist
  • You think taste cannot be delegated to an agent
  • You are comfortable with tight deadlines
  • You can invent new experiences that don’t have analogs
  • You believe diffusion of agents throughout the economy is one of the most important missions of this decade

HOW WE WORK

  • Writing is thinking
  • Quality and speed
  • Freedom and responsibility
  • Ruthlessly outcomes-oriented
  • Think in systems
  • 5 days/week on-site in SF

Benefits:

  • Generous equity grant vested over 4 years
  • Health, dental, and vision insurance
  • 401(k) with company match
  • Unlimited paid vacation and sick days
  • Parental leave for birthing and non-birthing parents
  • Free mental health services
  • $200 monthly wellness reimbursement
  • $1.5K monthly meal stipend
  • $200 monthly laundry reimbursement
  • Free Equinox membership
  • Up to $15K relocation bonus

Mercor is an Equal Opportunity Employer and is committed to providing equal opportunity to all employees and applicants. Mercor does not discriminate based on actual or perceived race, color, creed, religion, national origin, ancestry, citizenship status, age, sex or gender (including pregnancy, childbirth, related medical conditions and lactation), gender identity or gender expression, sexual orientation, marital status, military service and veteran status, disability, protected medical condition as defined by California or local law, genetic information, or any other characteristic protected by applicable federal, California, or local laws and ordinances. Further, Mercor prohibits discrimination, harassment, and retaliation based on any combination of protected characteristics. This Policy applies to all areas of employment, including recruitment, hiring, training, promotion, compensation, benefits, discipline, termination, and all other privileges, terms, and conditions of employment. This Policy and the law prohibit employment discrimination against any employee or applicant based on any legally protected status.

Source: Mercor careers (Ashby)

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