Web developer xhtml, css, javascript Work, Jobs in Field Based (with Salaries)

Software Developer
Veriscope.Digital —Remote
- £15 - £30 an hour
- Part-time
- Remote
- Computer Science
- JavaScript
- APIs
Quick apply
Frontend Developer
StraxSystems —Remote
- Remote
- JavaScript
- APIs
- Communication skills
Software Developer
Nordic Software and AI —Remote
- From £14 an hour
- Remote
- Azure
- English
- Java
- Work from home
Quick apply
Web Developer
Ramark systems Ltd —Remote
- £34,000 - £45,000 a year
- Full-time
- Remote
- Azure
- AWS
- JavaScript
Quick apply
Web Content Editor
Gallagher —Remote
- Remote
- Bachelor's degree
- Communication skills
- HTML
Software Engineer, Front End
Enterprise League —Remote
- Full-time
- Remote
- English
- Maths
- JavaScript
MERN Stack Developer (3–4 Years Experience)
Crystal Vision —Remote
- £750 - £1,200 a month
- Full-time
- Remote
- AWS
- Analysis skills
- JavaScript
Quick apply
Python Web Developer
MKSK Consulting —Remote
- £96,000 - £200,000 a year
- Remote
- English
- SQL
- JavaScript
Web Designer
Ramark systems Ltd —Remote
- £24,420.00 - £49,549.80 a year
- Full-time
- Remote
- Data analysis skills
- SQL
- JavaScript
Quick apply
PHP Web Developer
MKSK Consulting —Remote
- £20,000 - £45,000 a month
- Remote
- English
- SQL
- JavaScript
Mid-level Laravel Developer
TwoHundred Development Ltd —Remote
- £50,000 - £60,000 a year
- Full-time
- Remote
- English
- JavaScript
- APIs
- Work from home
Quick apply
14d
Software Developer
Ramark systems Ltd —Remote
- £30,000 - £55,000 a year
- Full-time
- Remote
- Azure
- Java
- SQL
Quick apply
1d
Junior Software Engineer
Evri —Remote
- £31,000 a year
- Remote
- Java
- AWS
- JavaScript
- Employee assistance programme
- Employee discount
2d
Frontend Developer (Senior) m/w/d
ORCAYA GmbH —Remote
- Remote
- JavaScript
- APIs
- Internship
Quick apply
IT Web Developer - Website Creation - Coding
321 Estates Construction Ltd —Remote
- £15 - £30 an hour
- Temporary
- Remote
- Azure
- DevOps
- SQL
Quick apply
7d
Senior Wordpress & AI Developer
Atomic Digital Marketing —Remote
- £32,000 - £42,000 a year
- Part-time
- Master's degree
- JavaScript
- Travel
- Flexitime
- Work from home
Quick apply
14d
Technical Web Developer / Engineer
MKSK Consulting —Remote
- £96,000 - £300,000 a year
- Remote
- English
- SQL
- JavaScript
Front End Developer
Voipfibre —Remote
- £31,888.92 - £83,792.98 a year
- Full-time
- Remote
- Azure
- Computer Science
- DevOps
Quick apply
3d
MS365 Developer (Amsterdam) (Remote)
RemoteStar —Remote
- Full-time
- Remote
- Azure
- JavaScript
- Travel
Junior Software Engineer, Central AI Lab
Jonas Software —Remote
- Full-time
- Remote
- Azure
- Java
- Master's degree

I want to receive the latest job alerts for web developer xhtml, css, javascript in field based

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Software Developer

Veriscope.Digital
Remote

Quick apply

Job details

Part-time
£15 - £30 an hour

Qualifications

Computer Science
CSS
React
iOS
Git
JavaScript
GitHub
APIs
UI
HTML

Full job description

Job Overview

Content Sieve is an AI-powered Chrome extension (Manifest V3) that filters web content by topic across any website, using OpenAI's API via a Cloudflare Worker proxy to intelligently distinguish genuine topic matches from false positives. The extension is live on the Chrome Web Store with a working free/premium tier model and Stripe subscription billing already in place. We are looking for a developer to help extend its capabilities, improve filtering accuracy, and build toward a more polished product.

Responsibilities

Develop, test, and deploy updates to a Manifest V3 Chrome extension using vanilla JavaScript, working across content scripts, background service workers, and the popup UI.
Improve and extend the core AI filtering logic, including the keyword-first gate and dual-model routing between GPT-4.1-nano (free tier) and GPT-4.1-mini (premium tier).
Maintain and enhance the Cloudflare Worker back end, including the /api/check-content, /api/validate-key, /api/checkout, and /api/stripe-webhook endpoints.
Work with Cloudflare KV namespaces for licence key storage and free-tier daily cap enforcement.
Extend or improve the Stripe integration, including checkout session creation, webhook handling, and licence key generation on successful payment.
Improve DOM traversal logic in the content script for more reliable card detection across deeply nested React and Next.js page structures.
Maintain and improve the popup UI, built in HTML, CSS, and vanilla JavaScript.
Manage session caching logic and client-side rate limiting (token bucket) to minimise unnecessary AI calls.
Use Git and GitHub for version control throughout.
Document architectural decisions and deployment steps clearly for ongoing reference.
Help build the Android and iOS version

Experience

Demonstrable experience building Chrome extensions using Manifest V3, including content scripts, background service workers, and the Chrome messaging API.
Strong proficiency in vanilla JavaScript, including asynchronous patterns, chrome.storage.sync, and browser extension APIs.
Hands-on experience with Cloudflare Workers and Wrangler, including KV namespace management and secret configuration.
Familiarity with the OpenAI Chat Completions API and prompt design for classification tasks.
Experience integrating Stripe, including checkout sessions, webhook verification (HMAC-SHA256), and subscription lifecycle events.
Solid understanding of HTML5 and CSS3 for extension popup and options UI work.
Version control with Git and GitHub is essential.
Experience with DOM traversal and content manipulation across diverse page structures, including React and Next.js sites, is a strong advantage.
Prior experience shipping a published browser extension is strongly preferred.
A Computer Science or related degree preferable but not compulsory.

Before You Apply

We ask that all candidates install Content Sieve from the Chrome Web Store or www.veriscope.digital and spend a few minutes using it before submitting an application. We're looking for a brief professional assessment alongside your application: what works well, what doesn't, and where you see the clearest opportunities for improvement — whether in filtering accuracy, UI, performance, or architecture.

This isn't a test with a right answer. It tells us how you think about an existing codebase and a real product, and it means any conversation we have from the first message is grounded in direct experience of what you'd be working on.

The extension is free to install. Find it at the Chrome Web Store or www.Veriscope.Digital

Pay: £15.00-£30.00 per hour

Application question(s):

Take a look at Content Sieve, what improvements would you suggest to the product?

Work Location: Remote

Quick apply

Refine Your Search

web developer xhtml, css, javascript jobs in field based

Software Developer

Frontend Developer

Software Developer

Web Developer

Web Content Editor

Software Engineer, Front End

MERN Stack Developer (3–4 Years Experience)

Python Web Developer

Web Designer

PHP Web Developer

Mid-level Laravel Developer

Software Developer

Junior Software Engineer

Frontend Developer (Senior) m/w/d

IT Web Developer - Website Creation - Coding

Senior Wordpress & AI Developer

Technical Web Developer / Engineer

Front End Developer

MS365 Developer (Amsterdam) (Remote)

Junior Software Engineer, Central AI Lab

I want to receive the latest job alerts for web developer xhtml, css, javascript in field based

Related Searches

Explore jobs in more locations

Jobseeker tools

Employer Tools

Browse

Stay Connected