Frontend Developer (React)

Location: London, England, United Kingdom

Company

Zuma Labs is a technology startup building trading products for over-the-counter markets, including Venetian and Squawk, in partnership with brokerage customers.

What you will do

• Build and maintain front-end applications using TypeScript and React.
• Collaborate with product, design, and backend teams to deliver user- and broker-facing features.
• Develop reusable components, design systems, and front-end architecture.
• Identify and resolve UI/UX and performance bottlenecks.
• Apply practical technical solutions to real-world trading and data problems.

Requirements

• Strong experience with TypeScript and React 16+.
• Proficiency in JavaScript ES6+.
• Experience with React testing frameworks such as Jest and Enzyme.
• Understanding of supporting infrastructure, including Git, microservices, and containers.
• Comfort working with numbers and data; prior trading or finance experience is not required.
• Strong design awareness and interest in improving user interfaces.

Nice to have

• Experience with GraphQL, Apollo Client, single-page applications, or reactive mobile UI development.
• Familiarity with Material UI or similar component libraries.
• Experience with WebSockets, real-time applications, CI/CD pipelines, or end-to-end testing.
• Knowledge of browser APIs and UX/UI design principles.

Culture & Benefits

• High-impact startup environment with immediate influence on business outcomes.
• Direct collaboration with founders, brokers, traders, and product experts.
• Broad responsibilities and significant autonomy over implementation.
• Culture focused on creativity, ownership, experimentation, and rapid iteration.