Full Stack Node.js/React Developer - Fintech Innovation Team

B4B Payments Group; City of London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading FinTech firm in London is seeking a Full Stack Node.js/React Developer to join their innovation team. The role focuses on transforming client-facing applications and user experiences while leading the migration to a modern development stack. Ideal candidates will have strong skills in Node.js and React, coupled with a passion for financial technology and user experience. This position offers the flexibility of remote work with periodic visits to the London office.

Benefits

Flexible remote work

Product-focused culture

Diversity and inclusion commitment

Qualifications

• 3-5 years full stack development experience.
• Experience in financial services highly desirable.
• Strong Node.js skills for middleware development.

Responsibilities

• Redesign financial workflows into user-friendly interfaces.
• Implement secure OIDC/OAuth flows for applications.
• Lead migration from legacy technologies to modern stack.

Skills

Node.js

React.js

Frontend design skills

OIDC/OAuth knowledge

Curious nature

Customer UX first approach

Tools

Ruby

MySQL

AWS

Job description

Overview

Full Stack Node.js/React Developer – FinTech Innovation Team

🏦 Join a regulated FinTech transforming global payments

🚀 Shape the Future of Financial Services

Join our new strategic team at a cutting-edge FinTech backed by Banking Circle’s international payment rails. We’re transforming how businesses access account-to-account payments, card issuing, and financial services across UK, EU, and US markets.

You’ll rebuild critical client-facing applications from the ground up, pioneering our move to Node.js/React and API-first architecture.

🏦 About Us

Regulated EMI in UK & EU, with US sponsor bank partnerships

• Visa & Mastercard authorised card issuer
• Global reach with homogeneous services across three major markets
• Dual client base serving both direct clients and strategic partners
• 40-person product & tech team driving innovation in financial services

What You’ll Build

Client Portal & Onboarding Transformation

• Redesign complex financial workflows into intuitive, user-friendly interfaces
• Build secure, compliant applications handling sensitive financial data
• Create seamless onboarding experiences for businesses across multiple jurisdictions

Technical Innovation

• Pioneer Node.js adoption within our established Ruby/MySQL/AWS infrastructure
• Architect robust middleware solutions connecting frontend experiences to financial services
• Implement secure OIDC/OAuth flows for multi-tenant financial applications

Strategic Impact

• Lead migration from legacy technologies to modern React/Node.js ecosystem
• Establish development patterns for our expanding Node.js capabilities
• Showcase innovations to stakeholders in bi-monthly London sessions

The Developer We’re Seeking

• Curious nature with deep interest in how financial technology works
• Customer UX first approach – understanding that in FinTech, user experience directly impacts business success
• Security-conscious thinking appropriate for regulated financial service
• Experience in financial services highly desirable

Technical Excellence

• 3-5 years full stack development experience
• Strong Node.js skills for middleware development (new to our stack – you’ll help shape our approach)
• React.js expertise with modern development practices
• Frontend design skills – ability to create professional, trustworthy financial interfaces
• OIDC/OAuth knowledge essential for secure financial applications

Current Stack

• Ruby backend with MySQL database
• AWS infrastructure with containerised deployments
• GitHub for version control and collaboration

Your Focus

Node.js/React frontend transformation (new strategic direction)

• Integration with existing Ruby services

How We Develop

• Product-led approach with 2-week agile sprints
• Collaborative planning and regular innovation showcases

UK Remote: Welcome with twice-monthly London visits for planning & showcases

Compensation varies based on experience and location

Why Join Our FinTech Journey?

• Founding member of our Node.js/React transformation
• Regulated industry experience with global compliance exposure
• Cutting-edge financial services – payments, card issuing, multi-currency operations
• International scope across UK, EU, and US markets
• Product-focused culture with rapid iteration and innovation
• Strong backing from Banking Circle’s established infrastructure

Ready to Revolutionise FinTech?

If you’re a creative developer passionate about financial technology, user experience, and building secure, compliant applications that power global commerce, we want to hear from you.

Apply with your CV and tell us what excites you about building the next generation of financial services technology.

We’re committed to diversity and inclusion in FinTech. All backgrounds welcome.

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