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Node.js Developer London

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Node.js Development London

Node.js Developer London — REST APIs, Microservices & Real-Time Backends

ARS Developer Ltd builds Node.js backends for London businesses — Express and Fastify REST APIs, microservice architectures, real-time WebSocket systems, and TypeScript-first delivery. GBP milestone contracts. UK Companies House No. 17039150.

Best For

London fintech and proptech startups building Node.js API backends London SaaS companies needing real-time features — chat, notifications, dashboards Companies migrating London monolith backends to Node.js microservices London agencies needing Node.js white-label backend development UK companies needing Node.js integrations with Stripe, GoCardless, or Open Banking

Start a Project

Tell us your current situation and goals. We will recommend the right scope, timeline, and delivery model for your business.

Book Free Consultation View Pricing Portfolio

Why ARS Developer Ltd

  • UK Companies House No. 17039150
  • GBP milestone contracts — clear scope
  • UK GDPR compliant delivery
  • UK timezone support, Mon–Fri 09:00–18:00

Problems We Solve

  • London Node.js API has no TypeScript — runtime errors are frequent and costly.
  • Application cannot handle concurrent London users — blocking I/O issues.
  • Previous London developer built Node.js without tests or documentation.
  • Real-time features (WebSockets, SSE) are unreliable under London traffic load.
  • Node.js microservices are unmaintained and deployment is manual.

What's Included

1

Node.js REST API development with Express and Fastify for London businesses

2

TypeScript strict mode — type-safe Node.js for London production APIs

3

Real-time WebSocket systems with Socket.io for London fintech and SaaS

4

Node.js microservice architecture with Redis and BullMQ message queuing

5

OpenAPI documentation for all London Node.js API endpoints

6

Stripe UK, GoCardless, and Open Banking API integration with TypeScript types

7

GitHub Actions CI/CD pipeline for London Node.js deployments

8

GBP milestone contracts with full London architecture documentation

Frequently Asked Questions

A London Node.js REST API costs £6,000–£22,000. A real-time WebSocket application for a London SaaS company costs £10,000–£28,000. A microservice architecture with message queuing for a London product team starts from £18,000. All in GBP with milestone contracts.
For high-throughput London fintech: Node.js for real-time transaction processing, WebSocket connections, and event-driven microservices. Laravel for complex relational data, UK GDPR data compliance, and teams with strong PHP background. We build both for London clients.
Yes. London Node.js integrations include Stripe UK payment intents and webhooks, GoCardless variable direct debit, TrueLayer and Plaid Open Banking UK, and Klarna UK BNPL. All integration work includes TypeScript types, webhook signature verification, and idempotency handling.

Got a question?

Our UK team is available Mon–Fri, 09:00–18:00 GMT.

Contact Us

How We Work With UK Businesses

1 Book a Free Consultation

Complete the contact form or book a strategy call. We review your requirements and respond within one business day with next-step recommendations.

2 Receive a Scoped Proposal

We prepare a detailed proposal covering scope, delivery timeline, milestones, and GBP pricing. No open-ended retainers — every project has a clear contract.

3 Milestone-Based Delivery

Work is delivered in structured milestones with review and approval at each stage. You maintain full visibility and sign off before the next phase begins.

4 Launch and Post-Launch Support

We handle launch, post-launch monitoring, and hand over full documentation. Monthly growth and maintenance support available after launch.

Start a Project

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