Senior Frontend Developer - React

Senior Frontend Developer (React)

Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent

Bring modern web applications to life in the world of financial services

The Role

As a Senior Frontend Developer at Capco, you’ll craft clean, responsive, and secure web applications that enhance digital experiences for global financial clients. Working in an agile environment, you’ll help shape UI solutions using React and modern JavaScript technologies. You’ll play a key role in both hands-on development and guiding best practices across teams.

What You’ll Do

• Build performant and maintainable user interfaces using React (Hooks, Context Suspense) and Typescript
• Develop responsive cross-browser compatible layouts using modern CSS (Flexbox, Grid), CSS-in-JS or modular CSS, and component libraries such as MUI or Tailwind
• Optimise application performance using techniques like code-splitting, memorization, and lazy loading.
• Ensure secure application development following OAuth2, OpenID Connect, and JWT principles
• Collaborate closely with backend, design, and product teams to shape engaging user journeys
• Contribute to team learning through code reviews, mentoring, and sharing best practices

What We’re Looking For

• Strong proficiency in JavaScript (ES5/ES6+) and Typescript
• Hands-on experience building production application in React 18+
• Solid understanding of state management (Context API, Redux Toolkit, or similar)
• Experience consuming RESTful APIs and handling async data with modern patterns
• Strong CSS skills including Flexbox, Grid, and CSS pre-processors like SASS/LESS
• Familiarity with modern build and tooling ecosystems such as Vite, Webpack or similar
• Experience with frontend testing using Jest, React Testing Library, Cypress or Playwright
• A passion for UI performance, quality, and delivering clean code

Bonus Points For

• Exposure to Vue, Angular, or Next.js in production environments
• Understanding of secure application design and frontend performance optimisation
• Experience deploying applications in CI/CD pipelines
• Working knowledge of design systems, component-driven development and tools like Storybook
• Strong debugging skills and ability to work in fast-paced agile teams
• Curiosity for new technologies and experimentation

Why Join Capco

• Deliver high-impact technology solutions for Tier 1 financial institutions
• Work in a collaborative, flat, and entrepreneurial consulting culture
• Access continuous learning, training, and industry certifications
• Be part of a team shaping the future of digital financial services
• Help shape the future of digital transformation across FS & Energy.

Benefits

We offer a competitive, people-first benefits package designed to support every aspect of your life:

• Core Benefits: Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover.
• Mental Health: Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders.
• Family-Friendly: Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement.
• Family Care: 8 complimentary backup care sessions for emergency childcare or elder care.
• Holiday Flexibility: 5 weeks of annual leave with the option to buy or sell holiday days based on your needs.
• Continuous Learning: Your growth, your way - minimum 40 hours of training annually. Take your pick; workshops, certifications, e-learning. Also, Business Coach assigned from Day One: Get one-on-one guidance to fast-track your goals and accelerate your development.
• Healthcare Access: Convenient online GP services.
• Extra Perks: Gympass(Wellhub), travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance.

Inclusion at Capco We’re committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know – we’ll be happy to help. We value each person’s unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration – a mindset that shapes how we work with clients and each other every day.