Remote Frontend Engineer (Contract) - $90/hr

Mercor; San Francisco (CA); Hybrid; GBP 74,000 - 111,000; Full time

Job summary

Mercor, a remote-friendly contract opportunity, seeks a Frontend Engineer to craft polished user interfaces and deliver accurate reproductions for evaluation tasks.

The role emphasizes semantic HTML/CSS, responsive layouts, ARIA semantics, and robust debugging. You will work from a high standards checklist and communicate clearly in English.

You’ll collaborate with a small team, review two candidate implementations, and provide precise notes on fidelity, layout, and accessibility.

Qualifications

• 3–8 years of professional web development experience in frontend or full-stack roles.
• Fluency across web eras and legacy layouts.
• Proficient in hand-written HTML and CSS with semantic markup, flexbox, grid, media queries, and legacy layouts.
• Comfort with the command-line: unzip archives, run a static server, fix broken image references.
• Strong professional written English for task justification.

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, 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.
• Provide detailed explanations like "B nests the article body in a single absolutely-positioned div...".
• Use the "this task is broken" escape hatch with judgment.

Skills

Frontend web development

Web standards

English writing

Tools

ARIA

DOM

Job description

Mercor, a remote-friendly contract opportunity, seeks a Frontend Engineer to craft polished user interfaces and deliver accurate reproductions for evaluation tasks.

The role emphasizes semantic HTML/CSS, responsive layouts, ARIA semantics, and robust debugging. You will work from a high standards checklist and communicate clearly in English.

You’ll collaborate with a small team, review two candidate implementations, and provide precise notes on fidelity, layout, and accessibility.