Software Engineer Web Java Pr

Softtek; Guanajuato; A distancia; MXN 1.889.000 - 2.690.000; Jornada completa

Descripción de la vacante

Mercor is seeking a Web Development Expert to work fully remotely as a Frontend Engineer on a contract basis. Compensation is up to $90/hr. The role focuses on rendering, comparing, and judging two candidate reproductions for fidelity across viewports, using HTML/CSS and JavaScript to analyze DOM impact and typography.

Applicants should have 3–8 years of frontend experience, strong manual HTML/CSS skills, and proficiency with browser DevTools. Prior RLHF or code-review experience is a plus.

Formación

• 3–8 years of professional frontend or full-stack web development.
• Fluency across web eras including legacy layouts.
• Written English for task justification.
• Hands-on HTML and CSS: semantic markup, flexbox, grid, media queries.
• Browser DevTools proficiency.
• CLI skills: local server setup and image troubleshooting.
• JavaScript enough to read scripts and assess DOM impact.

Responsabilidades

• Render a reference page and two replications at 1920×1080 and judge closeness.
• Analyze CSS box model, typography, color, borders, assets, z-order, and overflow.
• Read source attempts and grade construction quality.
• Test responsiveness across viewports and identify collapses.
• Provide evidence-based justifications for all preferences.
• Use the escape hatch to flag unfinishable tasks when needed.

Conocimientos

Web development

HTML

CSS

JavaScript

DevTools

Command line

English writing

Descripción del empleo

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 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.