Senior Frontend Developer (React)

TL;DR

Senior Frontend Developer (React): Building and optimizing responsive, secure web applications for global financial clients with an accent on UI performance, component-driven architecture, and clean code. Focus on developing complex user journeys, ensuring cross-browser compatibility, and collaborating within an agile environment to deliver high-impact digital solutions.

Location: London (Hybrid)

Company

Capco is a global technology and management consultancy specializing in digital transformation for the financial services and energy sectors.

What you will do

• Build performant and maintainable user interfaces using React and TypeScript.
• Develop responsive, cross-browser compatible layouts using modern CSS and component libraries.
• Optimize application performance through code-splitting, memoization, and lazy loading.
• Ensure secure development following OAuth2, OpenID Connect, and JWT principles.
• Collaborate with backend, design, and product teams to shape engaging user journeys.
• Contribute to team growth through code reviews, mentoring, and sharing best practices.

Requirements

• Strong proficiency in JavaScript (ES5/ES6+) and TypeScript.
• Hands-on experience building production applications in React 18+.
• Solid understanding of state management (Context API, Redux Toolkit).
• Experience consuming RESTful APIs and handling async data.
• Strong CSS skills (Flexbox, Grid, SASS/LESS).
• Experience with frontend testing using Jest, React Testing Library, or Cypress.

Nice to have

• Exposure to Vue, Angular, or Next.js in production.
• Experience with CI/CD pipelines.
• Working knowledge of design systems and Storybook.
• Understanding of secure application design and performance optimization.

Culture & Benefits

• Competitive benefits package including pension, health, life, and critical illness insurance.
• Comprehensive mental health support and family-friendly policies.
• 5 weeks of annual leave with holiday buy/sell options.
• Minimum 40 hours of annual training with a dedicated Business Coach from Day One.
• Access to Gympass, travel insurance, and cycle-to-work schemes.
• Collaborative, flat, and entrepreneurial consulting culture.