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Software Engineer (Front-end)

Mercor
Full Timejunior
Toronto, Ontario, CAPosted March 14, 2026

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JavaScriptTypeScriptReact

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Job Description

Mercor is hiring experienced Software Engineers to support high-impact research collaborations with leading AI labs. Freelancers will contribute to building training datasets that improve AI model performance on real-world client-side web development tasks.

This is a unique opportunity to apply your frontend engineering expertise toward shaping the next generation of intelligent systems.

About The Project

You'll create high-quality vibe coding data to train models on client-side web development skills—including state management, interactivity, UI correctness, and robustness. This could be in the format of games, web applications, visualizations, simulations, and more.

Key Responsibilities

  • Write realistic, self-contained prompts for client-side web apps, games, tools, and simulations
  • Create precise, binary rubrics tagged by verification type
  • Ensure all rubric items are pass/fail and verifiable from screenshot + code inspection

Ideal Qualifications

  • 2+ years of experience in frontend/full-stack development or technical content creation
  • Degree in Software Engineering, Computer Science, or a related field (Bachelor's minimum; advanced degree preferred)
  • Strong proficiency in JavaScript, TypeScript, React, or vanilla JS
  • Comfortable writing precise technical specifications and evaluation criteria

Project Timeline

  • Start Date: Immediate
  • Duration: 1-2 months
  • Commitment: Part-time (15–25 hours/week, with flexibility up to 40 hours/week)

Application & Onboarding Process

  • Upload your resume
  • AI interview: A short, 15-minute conversational session to understand your background, experience, and interest in the role
  • Follow-up communication within a few days with next steps and onboarding details

Apply today and leverage your frontend engineering expertise to help build the future of AI-driven systems!

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