Senior Backend Engineer – Node.js & AI

Salary: £70,000 - 85,000 per year

• At least five years of commercial software development experience
• Strong experience developing Node.js backend systems
• Proven API design and implementation skills
• Experience with relational databases such as PostgreSQL, MySQL or SQL Server
• Experience integrating external services
• Confidence using AI coding tools in an enterprise production development workflow
• Strong knowledge of automated testing, Git, CI/CD and secure development practices
• Ability to work independently and take ownership in a growing team
• Interest in financial technology and improving access to financial services
• Applicants must have the right to work in the UK without requiring visa sponsorship
• Desirable: experience in banking, fintech, payments or another regulated sector; delivering AI or LLM features into live products; cloud platforms such as AWS, Azure or GCP; containers and infrastructure as code; mentoring colleagues or establishing engineering practices

• Build and maintain backend applications using Node.js
• Develop APIs, database services and event-driven systems
• Integrate the platform with banking, payments and third-party services through REST and GraphQL
• Use AI coding tools to improve delivery while maintaining rigorous testing, security and code quality
• Develop and deploy practical AI features that improve customer experiences and business processes
• Own implementation, testing, deployment and ongoing support
• Contribute to architecture, code reviews and engineering standards
• Work collaboratively with product, design, platform and payments teams
• Take ownership of features from design through production

• AI
• API
• AWS
• Azure
• Backend
• CI/CD
• Cloud
• CTO
• GCP
• Git
• GraphQL
• Support
• LLM
• MySQL
• PostgreSQL
• REST
• SQL
• Security
• NodeJS
• JavaScript

More:

We are recruiting for a fintech business developing a new platform for digital financial services. With established backing and its first engineering team taking shape, this role offers the opportunity to influence technical decisions, build services from the ground up and help shape how the team works. Reporting to the CTO, the Senior Backend Engineer will help build reliable, secure services for banking and payments products, with AI incorporated into both development workflows and the platform. The role is based in Manchester with hybrid working and offers a salary listed as £70,000–£85,000, alongside a generous holiday allowance plus bank holidays, pension contributions, professional development support, clear progression opportunities and significant input into the technology and direction of the new engineering team.

last updated 41 week of 2026