Senior Frontend Engineer

Description As a Senior Frontend Engineer on the Payments Platform team, you will play a key role in building scalable, high-performance frontend infrastructure and user experiences that power payment flows for global merchants. You’ll work closely with product managers, designers, backend engineers, and customer-facing teams to create reliable, elegant, and developer-friendly solutions used across multiple products and integrations. This role combines strong product thinking with engineering excellence — from building reusable UI systems and SDKs to optimizing performance, reliability, and scalability across our platform. We’re looking for someone who thrives in a fast-moving remote environment, takes ownership end-to-end, communicates clearly, and can independently drive projects from concept to production. Responsibilities Design and develop scalable, performant, and 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 to deliver intuitive and reliable user experiences. Own features end-to-end — from technical planning and architecture through implementation, testing, deployment, and monitoring. Optimize application performance, responsiveness, and reliability across devices and browsers. Ensure high engineering standards through code reviews, testing, documentation, and observability. Publish and manage SDK and NPM package versions, including backward compatibility and release management. Help improve development workflows, tooling, and engineering best practices across the frontend ecosystem. Contribute to building a strong engineering culture focused on quality, ownership, collaboration, and continuous improvement. Requirements 5+ years of experience building modern web applications. Strong proficiency in React, TypeScript, JavaScript, HTML, and CSS. Experience designing and maintaining reusable frontend architectures, component libraries, or SDKs. Experience managing NPM packages, versioning, and release processes. Strong understanding of frontend performance optimization and modern browser behavior. Experience working with APIs and complex asynchronous flows. Familiarity with server-side rendering frameworks such as Next.js — advantage. Familiarity with additional frontend frameworks (Angular, Vue, etc.) — advantage. Experience building and maintaining frontend integrations with global payment platforms (e.g., Adyen, Stripe, Nuvei), including hosted components, wallets, and alternative payment methods — advantage. Experience with cloud environments and CDN infrastructure (AWS preferred). Experience working in production-scale environments with high reliability requirements — advantage. Soft Skills Strong ownership mindset with the ability to independently drive initiatives in a remote environment. Ability to balance speed, quality, and pragmatism in a fast-paced startup culture. Strong collaboration skills across Engineering, Product, and Design teams. Proactive problem-solver with a high attention to detail. Comfortable working asynchronously across teams and time zones.