Senior Full-Stack Engineer: FinTech Platform & Scalable Apps

Spectrum IT Recruitment; Newbury; On-site; GBP 70,000 - 95,000; Full time

Job summary

Spectrum IT Recruitment is seeking a Senior Full Stack Engineer to join a growing FinTech business building financial planning and modelling technology used by major financial institutions across the UK. You will design, build and maintain key modules, take ownership from design through production, and influence engineering standards.

You will work with React and Node.js, design APIs, optimise performance and security, and contribute to CI/CD improvements.

Qualifications

• Proven full-stack development experience using React and Node.js.
• Experience designing scalable applications and APIs.
• Strong knowledge of databases (MongoDB/Redis) and testing.
• Experience with cloud platforms and CI/CD.

Responsibilities

• Design, build and maintain full-stack financial planning and modelling applications.
• Take ownership of development from technical design through to production.
• Contribute to architecture, performance, scalability and security improvements.
• Improve CI/CD pipelines and automated tests.
• Lead code reviews and mentor engineers.
• Collaborate with Product and stakeholders to deliver practical technical solutions.

Skills

Full-stack dev experience

React

Node.js

APIs design

Problem solving

Communication

Cloud platforms

AI tooling awareness

Tools

MongoDB

Redis

CI/CD

Containerisation

Automated testing

Job description

Spectrum IT Recruitment is seeking a Senior Full Stack Engineer to join a growing FinTech business building financial planning and modelling technology used by major financial institutions across the UK. You will design, build and maintain key modules, take ownership from design through production, and influence engineering standards.

You will work with React and Node.js, design APIs, optimise performance and security, and contribute to CI/CD improvements.