Back end developers Work, Jobs in South Hanningfield, Ess (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
3d
Full Stack Developer
Eccentric IT Solutions Ltd —Colchester
- £40,000 - £55,000 a year
- Full-time
- Hybrid work
- Azure
- Java
- AWS
- Free parking
- Work from home
Quick apply
14h
AI Automation Developer
SS&C Technologies —Basildon
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Master's degree
Software Engineer
CELA REMIT LIMITED —Harlow
- £38,290 - £54,700 a year
- Full-time
- Hybrid work
- Computer Science
- Software troubleshooting
- Engineering
- Free parking
- Health & wellbeing programme
Quick apply
Software Engineer
Investa —London
- £60,000 - £85,000 a year
- Full-time
- Hybrid work
- System design
- Annual leave
Quick apply
12d
Full Stack Developer
QuantumLoopAI —London
- Full-time
- Communication skills
Quick apply
Full Stack Engineer (Backend Heavy)
QuantumLoopAI —London
- Full-time
- Remote
- Azure
- Analysis skills
- Mentoring
Quick apply
AI Engineer
IFS —London
- Full-time
- Hybrid work
- Machine learning
- AI
Quick apply
ICT Lead PHP Developer (Jadu Platform & Digital Services)
Medway Council —Chatham
- £45,795 a year
- Mentoring
4d
Blockchain Developer
Emerging Technology Ltd —London
Quick apply
Securities Finance Developer (Vice President)
Jefferies & Company, Inc. —London
- Full-time
- SQL
- AWS
- Software development
Full Stack Software Engineer , Assistant Vice President
State Street —London
- Full-time
- Oracle
- Computer Science
- Engineering
Senior Software Engineer
WallStreetDocs —London
- Full-time
- AWS
- Mentoring
- Financial services
Senior Developer (SharePoint and .Net)
K2C Solutions —London
- English
- SharePoint
- Software development
Senior Developer - Risk Technology - C# .NET, Python, Snowflake SQL (Vice President)
Jefferies & Company, Inc. —London
- Full-time
- Computer Science
- Engineering
- AWS
iOS Engineer - Swift - London
Photon —London
- Hybrid work
- Software troubleshooting
- Continuous improvement
- APIs
Mid-Level Backend Engineer (Driver Squad)
HIVED —London
- Full-time
- Hybrid work
- Computer Science
- Master's degree
- AWS
Platform Engineer
Saturn —London
- Full-time
- Master's degree
- Machine learning
- APIs
Quick apply
Lead Engineer - Collections and Treasury
NALA —London
- Full-time
- Hybrid work
- APIs
- Life insurance
Quick apply
Lead / Senior Software Engineer || Enterprise Asset Management AI & Agentic Systems
IFS —London
- Full-time
- Computer Science
- Engineering
- Analysis skills
Quick apply

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Full-Stack JavaScript Developer

P & J Moore Limited
Upminster

Quick apply

Job details

Full-time
£40,000 - £60,000 a year
3 days 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

back end developers jobs in south hanningfield, ess

Full-Stack JavaScript Developer

Full Stack Developer

AI Automation Developer

Software Engineer

Software Engineer

Full Stack Developer

Full Stack Engineer (Backend Heavy)

AI Engineer

ICT Lead PHP Developer (Jadu Platform & Digital Services)

Blockchain Developer

Securities Finance Developer (Vice President)

Full Stack Software Engineer , Assistant Vice President

Senior Software Engineer

Senior Developer (SharePoint and .Net)

Senior Developer - Risk Technology - C# .NET, Python, Snowflake SQL (Vice President)

iOS Engineer - Swift - London

Mid-Level Backend Engineer (Driver Squad)

Platform Engineer

Lead Engineer - Collections and Treasury

Lead / Senior Software Engineer || Enterprise Asset Management AI & Agentic Systems

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