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 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

📌 Front-End Developer — Global Team, Autonomy (Madrid)
🏢 FUT-URE
📍 Madrid