Javascript developer / Work, Jobs in London, Eng (with Salaries)

Full-Stack JavaScript Developer
P & J Moore Limited —Upminster
- £40,000 - £60,000 a year
- Full-time
- SQL
- In-person
- Communication skills
- Free parking
Quick apply
1d
Junior Front-End Developer
Mediareach Advertising —Fulham
- £25,420 - £30,000 a year
- Full-time
- Hybrid work
- Software troubleshooting
- AI
- Communication skills
Quick apply
2d
Junior Software engineer
vServices —London
- Computer Science
- Bachelor's degree
- Agile
Frontend Developer
SLR Consulting —London
- Full-time
- Agile
Full Stack Developer
StoryTerrace —London
- £4,000 a month
- Remote
- AI
Quick apply
12d
Front-End Web Developer - 3 Month Contract
1st Formations —London
- £70,000 - £75,000 a year
- Full-time
- Hybrid work
- Communication skills
9d
Fullstack Developer - Python, Django, HTML, CSS, JavaScript
Kate Matthews Solutions —London
- £65,000 - £75,000 a year
- Computer Science
- AWS
Software Engineer
Fanvue —London
- £80,000 - £115,000 a year
- Full-time
- Remote
- Master's degree
- Software development
- AI
- Annual leave
- Gym membership
Web Developer (6m contract)
LocalStack —London
- £13,000 - £17,600 a month
- Remote
- AI
Quick apply
Frontend Developer
Durlston Partners —London
- £150,000 - £200,000 a year
Enso Finance - Frontend Engineer
deCircle —London
- Full-time
- Remote
- Bachelor's degree
- Flexible schedule
Quick apply
Software Developer
Royal College of Veterinary Surgeons —London
- £58,000 - £60,000 a year
- Full-time
- AWS
- Mentoring
- APIs
1d
Software Developer
Park Place Technologies —London
- Hybrid work
- Software troubleshooting
- Bachelor's degree
- Communication skills
4d
Full Stack Developer
LEWIS —London
Web Designer/Front end developer
Amplefuture —London
- Software troubleshooting
- HTML
Full-Stack Developer
Applied Data Science Partners —London
- Hybrid work
- Analysis skills
- Organisational skills
- Agile
- Annual leave
Frontend Developer (Vue.js or React or Angular)
TransPerfect —London
- Full-time
- Communication skills
Junior Front-end Developer Role
Syrox Emedia —Kingston upon Thames
- Communication skills
Front-End Developer
vServices —London
- Software troubleshooting
- Bachelor's degree
- Agile
Frontend Developer – AI
Durlston Partners —London
- £110,000 - £135,000 a year
- Financial services

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javascript developer / jobs near london, eng

Full-Stack JavaScript Developer

P & J Moore Limited
Upminster

Quick apply

Job details

Full-time
£40,000 - £60,000 a year
1 day ago

Benefits

Free parking
Casual dress
On-site parking

Qualifications

React
SQL querying
Microsoft SQL Server
SQL
Express.js
Docker
SCSS
Redis
Back-end development
Front-end development
Web services
Unit testing
Communication skills
NGINX

Full job description

Location

Upminster, Essex, UK

Working pattern

On Site

Salary

£40,000-£60,000, depending on experience

Employment type

Full-time

The opportunity

We're building a multi-brand claims-acquisition platform that guides consumers through the complete online claims journey, from their first visit through identity verification, e-signature and submission.

As a Mid-Level Full-Stack JavaScript Developer, you'll work across the platform: a React single-page application on the front end, Node.js APIs and background workers on the back end, and Microsoft SQL Server as the system of record.

This is a hands-on product engineering role where you'll ship customer-facing journey steps, build and consume REST APIs, write database migrations and integrate third-party services behind clean, maintainable interfaces.

What you'll do

Build and maintain customer-journey screens and shared components in React 19, using React Router 7, Vite and Sass/SCSS across multiple branded sites from a single codebase.
Develop back-end features in Node.js, including a Fastify API, an Express backend-for-frontend and durable background jobs processed through a SQL-backed outbox queue.
Design and evolve the SQL Server schema through forward-only migrations, using parameterised queries and transactional business logic.
Integrate and mock third-party services, including identity-verification and lead-management providers, while keeping transport details behind well-defined interfaces.
Write meaningful tests at every layer: Vitest unit and route tests, Testing Library component tests, and Playwright end-to-end journeys against a real database running in Docker.
Build with the needs of a regulated consumer product in mind, including robust input validation, careful PII handling, audit trails, idempotent retries and graceful degradation.
Work collaboratively to document technical decisions, follow established conventions and improve the platform as it grows.

What you'll bring

At least three years of professional JavaScript development experience, with meaningful hands-on work across both front-end and back-end development.
Strong React fundamentals, including hooks, controlled forms, routing and state management, together with confidence using modern ESM tooling.
Experience building and consuming REST APIs in Node.js using Fastify, Express or a comparable framework.
Practical SQL knowledge covering schema design, joins, transactions and indexes. SQL Server experience is helpful but not essential.
A genuine testing habit: you write useful tests because they prevent defects and support confident delivery, not simply because the CI pipeline requires them.
Clear written communication and the ability to document decisions, explain trade-offs and work within established conventions.

Nice to have

Experience working on multi-tenant or multi-brand products.
Familiarity with queue or outbox patterns, Redis, PM2, nginx or Cloudflare.
Exposure to regulated industries such as claims, finance or insurance, or experience with KYC and identity-verification journeys.

Our technology stack

Pay: £40,000.00-£60,000.00 per year

Benefits:

Casual dress
Free parking
On-site parking

Work Location: In person

Quick apply

Refine Your Search

javascript developer / jobs in london, eng

Full-Stack JavaScript Developer

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Front-End Web Developer - 3 Month Contract

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Full-Stack Developer

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Front-End Developer

Frontend Developer – AI

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