Talent.com
Mercor
Remote Frontend Engineer - AI Trainer ($90-$90 per hour)Mercor • Bethlehem, Pennsylvania, US
Remote Frontend Engineer - AI Trainer ($90-$90 per hour)

Remote Frontend Engineer - AI Trainer ($90-$90 per hour)

Mercor • Bethlehem, Pennsylvania, US
15 days ago
Salary
$90.00 hourly
Job type
  • Full-time
  • Remote
Job description
  • About the work We're building a high-quality dataset of human preference judgments on AI-generated frontend code. Each task hands you a reference web page — crawled from the real internet, delivered as a full zipped site tree plus screenshots of its default view and, on some pages, additional states reached by hovering, clicking, or scrolling. Alongside it come two model attempts, A and B, each a zipped self-contained site tree. The models only ever saw the screenshots; they never had the source. You download all three, run them locally, view each at a 1920×1080 viewport, interact with them to reach every required state, then open the source of both attempts and grade them against each other — on visual fidelity per state, and on how the code is actually constructed. Structure and responsiveness are explicitly part of the rubric, not just the render. This is evaluation work, not authoring. The defining skill is not that you can build a page — it's that you can open someone else's page and tell how it was built and where it cheats. Please read before applying - Each unit takes roughly 2–3 hours and is timed. This is not microtask work; if you can only offer scattered 15-minute windows, you will not be able to finish a unit. - You need a real local development environment. A tablet, a Chromebook, or a locked-down work machine that cannot run a local static server will not work for this project. - You need at least one completed Mercor engagement, delivered in full. We are not onboarding net-new experts to this project. What you'll do - Render a reference page and two candidate replications at 1920×1080 and 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 — distinguishing a replication that is genuinely correct from one that merely looks correct at one viewport. Hardcoded pixel offsets, absolute positioning standing in for real layout, inline style soup, a single undifferentiated div tree, or a screenshot pasted in as an `` instead of a rebuilt section. - Test responsiveness : a nav bar that looks right at 1920px but collapses at 1400px is a defect, and you should be able to say precisely why. - Write a specific, evidence-cited justification for every preference. We need "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" — not "A looks closer." - Use the "this task is broken" escape hatch with judgment : distinguish a task that genuinely cannot be completed from the screenshots provided from one that is merely hard. Over-flagging and under-flagging are both failure modes. You're a fit if you have - 3–8 years of professional web development experience, shipping web interfaces for a living, primarily in frontend or full-stack work. - Fluency across web eras. The reference pages are real crawled sites — one is a small charter-fishing business built in the table-and-image-map tradition, another a corporate press-release page with stacked navigation rows and social share widgets. If your entire career happened inside a modern component framework and you have never authored raw CSS or seen a `` used for layout, you will misjudge many of these pages. - Command of hand-written HTML and CSS : semantic markup, flexbox, grid, media queries, and legacy float- and table-based layouts you can read and reason about. You should be able to look at a rendered layout and predict what's holding it together before opening DevTools. - Browser DevTools as muscle memory — setting an exact viewport, walking the element tree, checking computed styles, watching what a hover handler mutates. - Command-line comfort : unzipping an archive, standing up a static local server because the relative asset paths demand it, and untangling a broken image reference rather than giving up and grading from the screenshot. - Enough JavaScript to read a page's scripts and understand what they do to the DOM, even if you don't write JS daily. - Professional written English. Every task ends in a free-text justification, and a rating without a specific rationale is worth very little. Equipment - A desktop or laptop that displays a 1920×1080 viewport. - Administrator rights on your own machine, so you can install and run a local server. Nice to have - Prior RLHF, preference-labeling, model-evaluation, or structured code-review work — the strongest single signal. Rubric-driven comparison at volume needs almost no ramp here. - Pixel-perfect design-to-code experience : agency work, design systems, template production. Anyone who has had a designer reject a build over four pixels has exactly the fidelity eye this needs. - Accessibility expertise (ARIA, semantic landmarks, heading hierarchy) — you'll notice immediately when an attempt renders a heading as a styled ``. - Familiarity with how LLMs fail at code generation. - Web scraping, archiving, or DOM-parsing background — comfort with messy crawled site trees. - More than one completed Mercor project, and availability in contiguous multi-hour blocks. Note : this seat is for practicing web developers. Backend-only, ML / data-science-only, mobile-native-only, and DevOps-only engineers do not have the UI instincts this requires, however strong they are otherwise. Designers who do not code cannot grade the source axes at all. Framework-only engineers who have never authored CSS outside a component library will struggle with the legacy reference pages.
Create a job alert for this search

Remote Frontend Engineer - AI Trainer ($90-$90 per hour) • Bethlehem, Pennsylvania, US

Similar jobs

Technical Writer - Remote

Nesco ResourceWest Point, PA, United States
Remote
Full-time

Education:o Minimum qualification- BS/BA in life sciences/engineering is requiredo Master's degree/PHD preferredRequired Experience and Skills:o At least 2 years working experience in a cGMP labora... Show more

 • Promoted

Dashers - Sign Up and Start Earning

DoorDashEast Stroudsburg, PA, United States

DoorDash is the #1 category leader in food delivery, food pickup, and convenience store delivery in the US, trusted by millions of customers every day.As a Dasher, you’ll stay busy with a var... Show more

 • Promoted

Job Chief Engineer

Highgate HotelsWest Point, PA, United States
Full-time

Highgate is a premier real estate investment and hospitality management company widely recognized as an innovator in the industry.Highgate is the dominant player in U.New York, Boston, Miami, San F... Show more

 • Promoted

Product owner - Remote

Gandiva InsightsCoplay, PA, United States
Remote
Full-time

W2 only No C2C Job title:Product Owner Remote Overview:We are seeking an experienced Product Owner to lead the delivery of a new enterprise intranet and digital employee portal.This highly visible,... Show more

 • Promoted

Intern- Marketing AI Enablement

W. R. BerkleyHarleysville, PA, United States
Full-time

Marketing AI Enablement InternThe Berkley Accident & Health Marketing AI Enablement Intern supports the A&H team in areas of underwriting, claims analysis, compliance, program development a... Show more

 • Promoted

Remote Web Casino Evaluator (Hiring Immediately)

Little WheelPocono Summit, PA, United States
Remote
Temporary

Join Our Team as a Website Tester at Little WheelLittle Wheel is a gambling technology company focused on researching and building products that put players first.We are currently hiring Website Te... Show more

 • Promoted

Aerie - Brand Ambassador (Sales Associate)

American Eagle OutfittersTannersville, PA, United States
Part-time

As a part-time Brand Ambassador, you bring our brand to life every day! Your goal is to provide everyone who comes in the store with an amazing shopping experience, making their day better than bef... Show more

 • Promoted

HR Technology Rewards Analyst - REMOTE

Organon & Co.Lansdale, PA, United States
Remote
Full-time

Job DescriptionOrganon is a Women's Health Company that believes in a better and healthier every day for every woman! We are a passionate, global community of thousands dedicated to redefining the ... Show more

 • Promoted

Consumer Insights Analyst

Earn HausLong Pond, Pennsylvania, United States
Full-time +1

We are urgently seeking people interested in taking market research studies for well known brands.If you are a self-starter, looking for flexible hours throughout the week, this may be for you! Ear... Show more

 • Promoted

Epic Beaker Analyst / Builder I - Remote Available in PA / NJ

St. Luke's University Health NetworkMontgomeryville, PA, United States
Remote
Full-time

Luke's is proud of the skills, experience and compassion of its employees.Luke's are our most valuable asset! Individually and together, our employees are dedicated to satisfying the mission of our... Show more

 • Promoted

Remote Product Tester - Flexible Studies

BuzzTestersSkippack, PA
Remote
Full-time

Earn up to $400/week, depending on the number and type of studies you complete.Share honest feedback on products and services from independent brands.Assignments include short online surveys (10–20... Show more

 • Promoted

NA Enterprise Expansion Account Executive, Great Lakes / Midwest Remote, US

Lucid SoftwareAllentown, PA, United States
Remote
Full-time

Na Enterprise Expansion Account Executive, Great Lakes / MidwestLucid Software is the leader in visual collaboration and work acceleration, helping teams see and build the future by turning ideas i... Show more

 • Promoted

Job Sr. Software Engineering Manager

AmetekHarleysville, PA, United States
Full-time

Location: Harleysville, PA, US.The Senior Software Engineering Manager leads the development, certification, and sustainment of flight-critical embedded software for aircraft power systems and comp... Show more

 • Promoted

Product Owner - Data Visualization- Oaks PA (locals only)

United Software GroupHatfield, PA, United States
Full-time

Product Owner - Data Visualization.Must have with expertise in Analytical Dashboard/ Reporting for Financial systems.Define, build, and own the roadmap for wealth management platforms, aligning wit... Show more

 • Promoted

Benchling SME

Omni InclusiveWest Point, PA, United States
Full-time

Benchling In Vivo/Core Business Analyst.We are looking for a Business Analyst with hands-on Benchling experience (In Vivo or Core) to support R&D digital transformation initiatives.You will work cl... Show more

 • Promoted

Associate Director, Discovery Informatics

J&J Family of CompaniesSpring House, PA, United States
Full-time

At Johnson & Johnson,?we believe health is everything.Our strength in healthcare innovation empowers us to build a?world where complex diseases are prevented, treated, and cured,?where treatmen... Show more

 • Promoted

Firmware Engineer OOJ - 33292

Hatch Global SearchHatfield, Pennsylvania, United States
Full-time

A Firmware Engineer is responsible for designing, developing, and maintaining the software code (firmware) that controls the functionality of electronic hardware devices.The Embedded Firmware Devel... Show more

Work from home - Market Research Study

Earn HausWind Gap, Pennsylvania, United States
Remote
Full-time +1

We are urgently seeking people interested in taking market research studies for well known brands.If you are a self-starter, looking for flexible hours throughout the week, this may be for you! Ear... Show more

 • Promoted

Product Training Manager-Americas

WeilerCresco, PA, United States
Full-time

Product Training Manager - Americas.We've been leading the Weiler way for four generations, creating value-enhancing solutions for cleaning, grinding, cutting, deburring, and finishing.It's not jus... Show more

 • Promoted

Market Research Associate - No Experience

Clubshop | USPerkiomen, Pennsylvania
Full-time

Discover The System Surveoo That’s Helping Newbies Earn Daily.Turn your free time into daily earnings by answering simple surveys.No product or tech skills needed.Join For Free And Start Earn... Show more