Web Development Expert - Fully Remote | Upto $90/hr

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 ×.

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 *px but collapses at *px.

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 ****px, 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.

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