Frontend Code Evaluation Specialist
$90 per hourMercor
Toronto, ON
- Remote job
About the job
Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey .
Position: Frontend Engineer
Type: Contract
Compensation: $90/hour
Location: Remote
Role Responsibilities
- Render a reference page and two candidate replications at 1920×1080. Judge which is the closer reproduction, state by state.
- Diff visual fidelity in detail: box model and spacing, typography (family, size, weight, line-height, letter-spacing), color and border treatment, image and asset handling, z-order, and overflow.
- Read the source of both attempts and grade construction quality. Distinguish a replication that is genuinely correct from one that merely looks correct at one viewport.
- Test responsiveness. Identify defects such as a nav bar that looks right at 1920px but collapses at 1400px.
- Write specific, evidence-cited justifications for every preference. Provide detailed explanations like "B nests the article body in a single absolutely-positioned div, so the text overlaps the footer below 1600px, while A uses normal document flow."
- Use the "this task is broken" escape hatch with judgment. Distinguish a task that genuinely cannot be completed from one that is merely hard.
Qualifications
Must-Have
- 3–8 years of professional web development experience in frontend or full-stack work.
- Fluency across web eras, including legacy layouts like
used for layout.
- Command of hand-written HTML and CSS : semantic markup, flexbox, grid, media queries, and legacy float- and table-based layouts.
- Browser DevTools as muscle memory.
- Command-line comfort: unzipping an archive, standing up a static local server, and untangling a broken image reference.
- Enough JavaScript to read a page's scripts and understand their DOM impact.
- Professional written English for task justification.
Preferred
- Prior RLHF , preference-labeling, model-evaluation, or structured code-review work.
- Pixel-perfect design-to-code experience.
- Accessibility expertise ( ARIA , semantic landmarks, heading hierarchy).
- Familiarity with how LLMs fail at code generation.
- Web scraping, archiving, or DOM-parsing background.
- More than one completed Mercor project and availability in contiguous multi-hour blocks.
Application Process (Takes 20–30 mins to complete)
- Upload resume
- AI interview based on your resume
- Submit form
Resources & Support
- For details about the interview process and platform information, please check:
- For any help or support, reach out to: Show email
PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.
Vacancy posted 21 hours ago
Similar jobs that could be interesting for youBased on the Frontend Code Evaluation Specialist in Toronto, ON vacancy
$85 per hour
...Angelo , Larry Summers , and Jack Dorsey . Position: Frontend Engineer (Coding Agent Experience) Type: Contract... ...Responsibilities Use frontier AI coding agents to complete and evaluate complex engineering tasks. Review model-generated frontend...Front endFull timeContract workSummer workRemote work$45 - $65 per hour
...cycle tasks with deterministic rubrics to evaluate agent performance against verifiable... ...authorization, charge entry, ICD-10/CPT/HCPCS coding , and denial analyses. Create tasks... ...performance in healthcare revenue cycle evaluations. Qualifications Must-Have...Front endHourly payWeekly payFull timeContract workFor contractorsSummer workRemote work$70 - $120 per hour
...realistic developer prompts across multiple categories, such as code review, debugging, and error diagnosis. Source and adapt content... ...explanation quality. Collaborate with AI labs to enhance evaluation datasets for AI reasoning and technical judgment. Work...SuggestedFull timeSummer workFreelanceImmediate start$80 - $150 per hour
..., and Jack Dorsey . Position: MS Excel / Google Sheets Evaluator Type: Contract Compensation: $80–$150/hour... ...relevance. Provide structured feedback to enhance document evaluation processes. Utilize MS Excel and Google Slides to perform...SuggestedContract workSummer workRemote work$25 - $45 per hour
...25–$45/hour Location: Remote Role Responsibilities Evaluate AI-generated written conversations using predefined rubrics to enhance performance. Draft and refine evaluation rubrics for generalist writing tasks. Apply structured scoring...SuggestedFull timeContract workSummer workRemote work$70 - $100 per hour
...Compensation: $70–$100/hour Location: Remote Commitment: 10–20+ hours/week Role Responsibilities Evaluate AI-generated office artifacts across Excel , Word , and PowerPoint formats. Perform pairwise comparisons of candidate responses...Remote jobContract workSummer workWork at officeImmediate start$25 - $35 per hour
...Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey . Position: AI Model Evaluation Contractor Type: Contract Compensation: $25–$35/hour Commitment: 20 hours/week Role Responsibilities...Full timeContract workFor contractorsSummer work$73 per hour
...Larry Summers , and Jack Dorsey . Position: Chemistry AI Evaluator Type: Contract Compensation: $73/hour... ...of explanations for different audiences. Apply consistent evaluation standards by following clear taxonomies, benchmarks, and detailed...Full timeContract workSummer workRemote work$70 - $100 per hour
...PowerPoint (.pptx) formats. Perform side-by-side pairwise comparisons of two candidate responses and select the stronger one. Evaluate both the content and rendering of each document—layout, formatting, visual structure, formulas, and overall presentation against the...Remote jobContract workSummer workWork at officeImmediate start$14 - $42 per hour
...Location: Remote Duration: Up to 6 months Commitment: 20+ hours/week Role Responsibilities Evaluate AI-generated music across various genres. Rate against detailed quality standards. Compare AI-generated lyrics with published songs...Remote jobContract workSummer workImmediate start$80 - $120 per hour
...Benchmark General Catalyst Peter Thiel Adam DAngelo Larry Summers and Jack Dorsey . Position: General Sales / GTM Evaluator Type: Contract Compensation: $80$120/hour Location: Remote Role Responsibilities Evaluate...Full timeContract workSummer workWork at officeRemote workFlexible hours$70 - $100 per hour
...Compensation: $70–$100/hour Location: Remote Commitment: 10–20+ hours/week Role Responsibilities Evaluate and compare AI-generated office artifacts in Excel , Word , and PowerPoint formats. Perform side-by-side comparisons of...Remote jobContract workSummer workWork at officeImmediate start$80 - $120 per hour
...and Jack Dorsey . Position: Humanities / arts / culture Evaluator Type: Contract Compensation: $80–$120/hour... ...Work independently and asynchronously to ensure high-quality evaluations. Collaborate with AI research teams to enhance training...Remote jobContract workSummer workWork at office$117k - $167k per year
...onboarding, anniversaries, and key career moments. As a Senior Frontend Engineer at Achievers, you are a force multiplier. You possess an... ..., and solving complex problems at scale. You don’t just write code; you take deep ownership, drive architectural decisions, mentor...Front endPermanent employmentFull timeWork at officeFlexible hours$80 per hour
...Larry Summers , and Jack Dorsey . Position: Data Engineer (Coding Agent Experience) Type: Contract Compensation:... ...Use frontier AI coding agents to complete and evaluate complex data engineering tasks. Review model-generated implementations...Full timeContract workSummer workRemote work- ...thinkers—one-third dedicated solely to investment management—we are specialists, not generalists. Managing over $18.6 billion (May 31, 2026)... ...) site infrastructure and translation workflow Contribute to code quality through reviews, testing, and documentation CMS and content...Front endLong term contractPermanent employmentFull timeImmediate startFlexible hours
$70 - $80 per hour
...pass/fail and verifiable from screenshot + code inspection. Develop high-quality... ...-Have ~2+ years of experience in frontend/full-stack development or technical content... ...writing precise technical specifications and evaluation criteria. Start Date ~...Front endFull timeSummer workFreelanceImmediate start$130k - $170k per year
...architecture. You take full ownership of your domain, guiding architectural choices and delivering high‑quality work autonomously. You establish coding standards, champion best practices, and strengthen team workflows through mentorship and example, all while demonstrating operational...Front endLong term contractFull timeWork at office3 days per week$160k - $250k per year
...Redux, Zustand). ~ A strong eye for UX/UI detail, accessibility, and responsive design. ~ Comfort dealing with complexity: legacy code, varied device support, and cross-platform consistency. ~ A self-starter who can define and deliver high-leverage solutions with minimal...Front endFull timeWorldwideFlexible hours- ...Job Type Full time Hybrid Lead Frontend Engineer, Materia AI Thomson Reuters is... ...with product managers, designers, and AI specialists to deliver elegant, high-performance React... ...to technical design decisions, ensuring code quality and best practices. AI Integration...Front endFull timeWork at officeFlexible hours2 days per week3 days per week
- ...Standard Time The Opportunity We are looking for a Staff Frontend Engineer who wants to build and own the next generation of... ...production rather than demoing well. Raise the engineering bar. Your code reviews shape how mid-level engineers grow. Your judgment shapes...Front endFull timeManual laborWork at officeRemote workWorldwideFlexible hours3 days per week
- ...- Writing clean, optimized and reusable code - Delivering work following established... ...as a Software Engineer -You have strong frontend development experience in React - You are... ...be an equal opportunity workplace and will evaluate qualified applicants without regard to race...Front endFull timeLocal areaWorldwide
$85 per hour
...Summers , and Jack Dorsey . Position: Backend Engineer (Coding Agent Experience) Type: Contract Compensation:... ...Responsibilities Use frontier AI coding agents to complete and evaluate complex engineering tasks. Review model-generated code for...Full timeContract workSummer workRemote work$104k - $156k per year
...Next.js. In this role, you will bring deep frontend expertise to solve complex engineering... ...Leverage AI-assisted development tools (Claude Code, GitHub Copilot, Cursor) fluently in your... ...to accelerate delivery. Critically evaluate AI-generated output and share effective patterns...Front endFull timeLocal areaWorldwide$100k - $130k per year
...leveraging AI to empower a wide range of decision-makers. We are looking for talented, self-starting engineers to join our platform team as frontend engineers. Your responsibilities will include: Work with the platform team to develop and improve new and existing features in...Front endFull timeWork at office1 day per week- ...and performance at scale. As a Staff Frontend Engineer on the App Platform team, you will... ...for frontend best practices — including code quality, accessibility, performance optimization... ...important to us! We are constantly evaluating how we accomplish this and currently,...Front endLong term contractFull timeInternshipHome officeFlexible hours
$80 - $110 per hour
...automation systems to optimize hiring infrastructure. Implement frontend experiences using React and related frameworks to create... ...Leverage AI-powered development tools like Cursor , Claude Code , and Devmate to accelerate development. Support autonomous...Front endHourly payWeekly payFull timeFor contractorsSummer workRemote work$85 per hour
...Larry Summers , and Jack Dorsey . Position: ML Engineer (Coding Agent Experience) Type: Contract Compensation:... ...Responsibilities Use frontier AI coding agents to complete and evaluate complex machine learning and AI engineering tasks....Contract workSummer workRemote work- ...responsive, performant, and accessible. Making key decisions on frontend architecture. Writing integration and unit tests. Learning... ...processes, tools, and systems that allow us to scale the code base, productivity, and the team. What You’ll Need Minimum...Front endFull timeContract workInternshipImmediate start
$160k - $220k per year
...Responsibilities Design and build reusable, high-quality frontend components across Faire’s web surfaces. Champion accessibility and... ...the design process. Mentor engineers, participate in design and code reviews, and raise frontend engineering quality. Lead...Front endFull timeWork at officeImmediate startRemote workMonday to fridayFlexible hours3 days per week
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Frontend Code Evaluation Specialist. Be the first to apply!
Related searches
- shipping/receiving specialist Toronto, ON
- information technology specialist Toronto, ON
- visual specialist Toronto, ON
- accommodation specialist remote Toronto, ON
- building performance specialist Toronto, ON
- import specialist Toronto, ON
- career transition specialist Toronto, ON
- disability management specialist Toronto, ON
- lead generation specialist Toronto, ON
- reading specialist Toronto, ON