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Web developer • lowell ma

Last updated: 4 days ago

Remote Frontend Engineer - AI Trainer ($90-$90 per hour)

MercorLawrence, Massachusetts, US
$90.00 hourly
Remote
Full-time

About the work** We're building a high-quality dataset of human preference judgments on AI-generated frontend code.Each task hands you a reference web page — crawled from the real internet, deliver... Show more

Loss Control Field Representative

Alexander & SchmidtAndover, MA, USA
Full-time

Loss Control Field Representative.At Alexander & Schmidt, a Loss Control Field Representative performs on-site property, general liability and incidental auto inspections and prepares reports for i... Show more

Certified Caregiver

Assisting HandsNorth Billerica, MA, United States
Full-time

Become a Caregiver with Assisting Hands Home Care!.As a Caregiver on our team, you will provide one-on-one assistance to clients in the comfort of their own homes.In this role, you will provide exc... Show more

Project Software Engineer / Project Software Developer

Triton Systems, Inc.Chelmsford, MA, USA
$95,000.00 yearly
Full-time
Quick Apply

Project Software Engineer / Project Software Developer Company SummaryTriton Systems, Inc combines 30+ years of experience with exciting growth and innovation opportunities within the product devel... Show more

Remote Adult Inpatient Nurses (RN) - AI Trainer ($55-$65 per hour)

MercorMethuen, Massachusetts, US
$55.00 hourly
Remote
Full-time

We're hiring experienced Adult Inpatient Nurses (RNs) to help train and evaluate AI systems used in clinical and healthcare settings.This role is ideal for nurses who want to apply their frontline ... Show more

Senior Corvision Developer

BIRDSVUE LLCDunstable, MA, US
$65.00 hourly
Full-time

The Senior CorVision Developer will serve as the primary developer for critical legacy platforms built on OpenVMS, CorVision, RDB, and associated operational tools.The position requires deep techni... Show more

Remote Software Developer $60 - $120/hourpay

Micro1Lowell, Massachusetts, US
$60.00 hourly
Remote
Full-time

AI data lab for training frontier models and evaluating AI agents.Experts contribute their diverse subject matter knowledge across domains such as finance, healthcare, STEM engineering, and more.AI... Show more

Loss Control Field Representative

Alexander & Schmidt - Getting the Job Done as a Trusted and Reliable PartnerAndover, MA, United States
Full-time

Loss Control Field Representative.At Alexander & Schmidt, a Loss Control Field Representative performs on-site property, general liability and incidental auto inspections and prepares reports for i... Show more

Contracts Administrator

Sunrise SystemsAndover, Massachusetts, United States
Full-time
Quick Apply

Job Title: Contracts Administrator.W2 Contract (Possible extension based on performance).We are seeking a highly organized and detail-oriented Contract Administrator to join our Sports Medicine tea... Show more

Recruiter and Business Development

American Health Care StaffingLowell, MA, United States
$22.00–$25.00 hourly
Full-time +1

Recruiter And Business Development.Lowell, MA, United States Or refer someone.About The Job Recruiter And Business Development.American HealthCare Staffing is looking for a recruiter with full-cycl... Show more

Software Product Line Manager

Analog DevicesChelmsford, MA, United States
Full-time

Software Product Line Manager Software Defined Radio (SDR) Systems-on-Module Portfolio.We are seeking a Software Product Line Manager to lead the strategy, roadmap, and business performance of an ... Show more

Full Stack Ruby on Rails Software Engineer

icortica IncBillerica, MA, US
Full-time
Quick Apply

We are seeking a Full Stack Ruby on Rails Engineer who is skilled at building scalable applications and comfortable leveraging AI in both development workflows and product features.You will work ac... Show more

Shipping/Receiving Associate

Vicor CorporationAndover, MA, US
Full-time

The Shipping & Receiving Associate supports the complete flow of material through Vicor's dock and warehouse, including receiving, shipping, inventory movement, and related system transactions.... Show more

Personal Lines Inside Sales Representative

Risman Insurance AgenciesTewksbury, MA, US
Remote
Full-time
Quick Apply

We're looking for a high-performing, client-focused sales professional with deep experience in personal lines insurance and a passion for delivering exceptional service.You'll work exclusively with... Show more

Senior Full-Stack Python Developer

SimeraCarlisle, Massachusetts, United States
Full-time

Senior Full-Stack Python Developer.This is a high-ownership role where you’ll work closely with the client, contribute to technical decisions, and deliver features from design through deployment.De... Show more

Remote Cybersecurity Research Expert – Offensive Security & Vulnerability Research - AI Trainer

MercorLowell, Massachusetts, US
Remote
Part-time

We're looking for highly accomplished **Cybersecurity Research Experts** to help evaluate cutting-edge AI systems in advanced security reasoning, vulnerability analysis, exploit development, and se... Show more

Certified Nursing Assistant or Home Health Aide

Assisting Hands Boston Northwest Home CareNorth Billerica, MA, United States
Full-time

Become a Caregiver with Assisting Hands Home Care.Change the Way the World Ages! As a Caregiver on our team, you will provide one-on-one assistance to clients in the comfort of their own homes.In t... Show more

Senior Event Producer Live/Hybrid and Virtual Events (Freelance)

StagedgeTewksbury, MA, United States
Full-time

Stagedge is seeking Freelance Event Producers (Live, Hybrid and Virtual), if you are interested in joining our growing team send your resume today!.As the Event Producer you will be responsible for... Show more

Recruiter

Tech MarketingAndover, MA, United States
Full-time

We are based in Fremont, California that offers complete technology services in IT staffing, Mobile development, Web development and Cloud computing.We work along with its clients to deliver high-p... Show more

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Remote Frontend Engineer - AI Trainer ($90-$90 per hour)

Remote Frontend Engineer - AI Trainer ($90-$90 per hour)

MercorLawrence, Massachusetts, US
15 days ago
Salary
$90.00 hourly
Job type
  • Full-time
  • Remote
Job description
  • About the work We're building a high-quality dataset of human preference judgments on AI-generated frontend code. Each task hands you a reference web page — crawled from the real internet, delivered as a full zipped site tree plus screenshots of its default view and, on some pages, additional states reached by hovering, clicking, or scrolling. Alongside it come two model attempts, A and B, each a zipped self-contained site tree. The models only ever saw the screenshots; they never had the source. You download all three, run them locally, view each at a 1920×1080 viewport, interact with them to reach every required state, then open the source of both attempts and grade them against each other — on visual fidelity per state, and on how the code is actually constructed. Structure and responsiveness are explicitly part of the rubric, not just the render. This is evaluation work, not authoring. The defining skill is not that you can build a page — it's that you can open someone else's page and tell how it was built and where it cheats. Please read before applying - Each unit takes roughly 2–3 hours and is timed. This is not microtask work; if you can only offer scattered 15-minute windows, you will not be able to finish a unit. - You need a real local development environment. A tablet, a Chromebook, or a locked-down work machine that cannot run a local static server will not work for this project. - You need at least one completed Mercor engagement, delivered in full. We are not onboarding net-new experts to this project. What you'll do - Render a reference page and two candidate replications at 1920×1080 and 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 — distinguishing a replication that is genuinely correct from one that merely looks correct at one viewport. Hardcoded pixel offsets, absolute positioning standing in for real layout, inline style soup, a single undifferentiated div tree, or a screenshot pasted in as an `` instead of a rebuilt section. - Test responsiveness : a nav bar that looks right at 1920px but collapses at 1400px is a defect, and you should be able to say precisely why. - Write a specific, evidence-cited justification for every preference. We need "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" — not "A looks closer." - Use the "this task is broken" escape hatch with judgment : distinguish a task that genuinely cannot be completed from the screenshots provided from one that is merely hard. Over-flagging and under-flagging are both failure modes. You're a fit if you have - 3–8 years of professional web development experience, shipping web interfaces for a living, primarily in frontend or full-stack work. - Fluency across web eras. The reference pages are real crawled sites — one is a small charter-fishing business built in the table-and-image-map tradition, another a corporate press-release page with stacked navigation rows and social share widgets. If your entire career happened inside a modern component framework and you have never authored raw CSS or seen a `` used for layout, you will misjudge many of these pages. - Command of hand-written HTML and CSS : semantic markup, flexbox, grid, media queries, and legacy float- and table-based layouts you can read and reason about. You should be able to look at a rendered layout and predict what's holding it together before opening DevTools. - Browser DevTools as muscle memory — setting an exact viewport, walking the element tree, checking computed styles, watching what a hover handler mutates. - Command-line comfort : unzipping an archive, standing up a static local server because the relative asset paths demand it, and untangling a broken image reference rather than giving up and grading from the screenshot. - Enough JavaScript to read a page's scripts and understand what they do to the DOM, even if you don't write JS daily. - Professional written English. Every task ends in a free-text justification, and a rating without a specific rationale is worth very little. Equipment - A desktop or laptop that displays a 1920×1080 viewport. - Administrator rights on your own machine, so you can install and run a local server. Nice to have - Prior RLHF, preference-labeling, model-evaluation, or structured code-review work — the strongest single signal. Rubric-driven comparison at volume needs almost no ramp here. - Pixel-perfect design-to-code experience : agency work, design systems, template production. Anyone who has had a designer reject a build over four pixels has exactly the fidelity eye this needs. - Accessibility expertise (ARIA, semantic landmarks, heading hierarchy) — you'll notice immediately when an attempt renders a heading as a styled ``. - Familiarity with how LLMs fail at code generation. - Web scraping, archiving, or DOM-parsing background — comfort with messy crawled site trees. - More than one completed Mercor project, and availability in contiguous multi-hour blocks. Note : this seat is for practicing web developers. Backend-only, ML / data-science-only, mobile-native-only, and DevOps-only engineers do not have the UI instincts this requires, however strong they are otherwise. Designers who do not code cannot grade the source axes at all. Framework-only engineers who have never authored CSS outside a component library will struggle with the legacy reference pages.