Senior Full Stack Developer

Role:  Senior Full-Stack Developer

Location: London (Hybrid)

Industry: FinTech Startup

Employment Type: Full-time

About the Company

We're recruiting for a fast-growing fintech startup building modern financial products that simplify how businesses and consumers manage money. Their team combines deep technical expertise with a product-first mindset to deliver scalable, secure, and user-friendly solutions in a highly regulated environment.

They are looking for a Senior Full-Stack Developer to play a key role in designing, building, and scaling our core platform as we continue to grow.

The Role

As a Senior Full-Stack Developer, you will work across the entire technology stack to deliver high-quality applications and services. You’ll collaborate closely with product, design, and engineering teams to shape architecture decisions, improve developer experience, and deliver customer-facing features at pace.

This is a hands-on role suited to someone who enjoys ownership, solving complex technical problems, and working in a fast-moving startup environment.

Key Responsibilities

• Design, build, and maintain scalable web applications using TypeScript, React, Node.js, and MongoDB

• Develop clean, maintainable, and well-tested frontend and backend code

• Build and optimise RESTful APIs and micro services

• Collaborate with product managers and designers to deliver intuitive user experiences

• Improve application performance, reliability, and security

• Participate in architecture discussions and technical decision-making

• Mentor junior developers and contribute to engineering best practices

• Support CI/CD pipelines, testing strategies, and deployment processes

• Work closely with DevOps and infrastructure teams in cloud environments

Required Skills & Experience

• 5+ years of commercial software development experience

• Strong expertise in TypeScript across frontend and backend applications

• Advanced experience with React and modern frontend tooling

• Strong backend development experience with Node.js

• Experience working with MongoDB in production environments

• Solid understanding of API design and distributed systems

• Experience with cloud platforms such as AWS, GCP, or Azure

• Familiarity with CI/CD pipelines and modern DevOps practices

• Strong understanding of software engineering principles, testing, and system design

• Experience working in agile product teams or startup environments

• Excellent communication and collaboration skills

Nice to Have

• Experience within fintech, payments, banking, or regulated industries, Docker and Kubernetes

• Knowledge of event-driven architectures and message queues

• Familiarity with GraphQL

• Exposure to security and compliance standards relevant to fintech

• Experience scaling systems in high-growth environments

What They Offer

• Competitive salary and equity package as well as a hybrid working environment in London

• Opportunity to shape the engineering culture and technical direction

• Work on meaningful products with real customer impact for a fast-paced startup environment with significant growth opportunities

• Learning and development budget, pension scheme and additional benefits

How to Apply

Please send your CV, GitHub profile, and any relevant project links along with a short introduction outlining your experience and interest in the role.

We welcome diverse applicants and are dedicated to treating all applicants with dignity and respect, regardless of background.