Senior Backend Engineer

604613
  • Negotiable
  • Basingstoke, England
  • Permanent

We're looking for a highly experienced Senior Backend / Full Stack Engineer to join a growing engineering team building and evolving a complex, production-grade fintech platform.

This is a hands-on role where you'll contribute from day one-designing architecture, building scalable systems, and delivering high-quality features across a modern full stack. You'll play a key part in shaping a platform that powers onboarding, payments, and compliance workflows across multiple markets.


What You'll Be Doing

Backend & Full Stack Development

  • Develop and enhance features within a NestJS / TypeScript backend
  • Design and implement scalable, secure RESTful APIs
  • Work with relational databases (PostgreSQL/MySQL) and optimise performance
  • Contribute to frontend features where appropriate (React Native)

Architecture & Engineering Excellence

  • Collaborate on system architecture and promote clean, modular design
  • Write high-quality, well-tested code (unit, integration, e2e) using Jest
  • Maintain CI/CD pipelines and Docker-based environments
  • Uphold best practices in code quality, testing, and performance

Integrations & Compliance

  • Build and maintain integrations with payment providers, identity verification, and open banking platforms
  • Work within regulated environments, supporting KYC/AML workflows
  • Handle event-driven systems, webhooks, and idempotent processing

Collaboration & Leadership

  • Work closely with product, design, and QA teams to deliver reliable releases
  • Contribute to documentation and technical decision-making
  • Mentor and support other engineers

Tech Stack

  • Backend: TypeScript, Node.js, NestJS
  • Frontend: React Native, Redux
  • Data: TypeORM, PostgreSQL / MySQL
  • Cloud & DevOps: AWS (Cognito), Docker, GitLab CI/CD
  • Testing & Docs: Jest, Swagger/OpenAPI
  • Integrations: Payments, Open Banking, Identity/KYC services

What We're Looking For

Essential Skills

  • 10+ years in software engineering
  • Strong expertise in TypeScript and Node.js
  • Proven experience with NestJS and RESTful API design
  • Deep understanding of relational databases and ORM tools
  • Experience with authentication (JWT, identity providers such as Cognito)
  • Strong testing mindset with experience using Jest
  • Confidence working with Docker and CI/CD pipelines


If you are a skilled Senior Backend Engineer with a passion for fintech, we would love to hear from you. Apply now to join our client's forward-thinking and dynamic team.

Jake Tyson Lead Consultant

Apply for this role