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About the jobMercor 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 EngineerType: ContractCompensation: $90/hourLocation: RemoteRole ResponsibilitiesRender 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.QualificationsMust-Have3-8 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.PreferredPrior 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.Resources & SupportFor details about the interview process and platform information, please check: For any help or support, reach out to:#J-18808-Ljbffr

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