JavaScript/TypeScript API Engineer

Contract Length: 6 Months

Location: Manchester (1 Day a week in Manchester City Centre Office)

Rate: Outside IR35 £350 - £400 per day

*Immediate Start*

Join a fast-moving product consultancy delivering high-impact software for a broad mix of clients across a range of sectors. They're now looking for an experienced contractor to support a critical project focused on API development and complex system integration.

The Role:
You'll be part of a small, highly cooperative engineering team working on a SaaS platform designed to streamline and automate operational workflows. The focus is on building out and refining backend APIs, integrating third-party services, and improving the overall scalability and reliability of the system.

Tech Stack:

TypeScript & JavaScript
Node.js with Express
n8n (workflow and automation integrations)
PostgreSQL
Permit.io (RBAC and auth)
API best practices (rate limiting, downstream HTTP integrations)
GraphQL (mostly migrating from)

Day-to-Day Responsibilities:

Contribute to backend development and API design using TypeScript
Work on system integrations using n8n and other tools
Collaborate on migrating from GraphQL toward more traditional RESTful architecture
Implement robust authentication and access control flows with Permit.io
Help shape and scale API architecture with performance in mind
Tackle complex business logic in a regulatory or data-driven context

About You:

Strong experience in backend JavaScript/TypeScript development
Comfortable in a busy, agile environment
Confident working autonomously in small, senior teams
Bonus if you've worked in fintech, regtech, or SaaS products
Clear understanding of scalable API architecture, auth, and third-party integrations

Please Apply with your CV if this contract is the best fit for you!