Senior Frontend Engineer (Payments Platform)

About the role

As a Senior Frontend Engineer on the Payments Platform team, you will build scalable, high‑performance frontend infrastructure and user experiences that power payment flows for global merchants. You will work closely with product, design, backend, and customer‑facing teams to ship reliable, elegant, developer‑friendly solutions used across multiple products and integrations.

Key responsibilities

• Design and develop scalable, performant, maintainable frontend applications using React, TypeScript, and modern web technologies.
• Build reusable UI components, shared libraries, and SDKs that support multiple products and integrations.
• Collaborate closely with Product, Design, Backend, and Customer‑facing teams.
• Own features end‑to‑end – technical planning, architecture, implementation, testing, deployment, and monitoring.
• Optimize application performance, responsiveness, and reliability across devices and browsers.
• Conduct code reviews, testing, documentation, and observability.
• Publish and manage SDK and NPM package versions, ensuring backward compatibility and handling release management.
• Improve development workflows, tooling, and engineering best practices across the frontend ecosystem.

Required profile

• 5+ years of experience building modern web applications.
• Strong proficiency in written and verbal English.
• Proven experience designing and maintaining reusable frontend architectures, component libraries, or SDKs.
• Experience managing NPM packages, versioning, and release processes.
• Solid understanding of frontend performance optimization and modern browser behavior.

Required skills

• React
• TypeScript
• JavaScript
• HTML
• CSS
• NPM package management
• SDK development
• Performance optimization
• API integration
• Asynchronous programming