Role 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. Qualifications - 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.

• Develop and Maintain Web Interfaces: Build responsive and interactive web applications using modern front-end technologies like HTML, CSS, JavaScript, and frameworks such as React, Vue, or Angular. • Collaborate with Teams: Work closely with the product team to implement designs and ensure that they are fully optimized across all platforms and browsers. • Write Clean, Maintainable Code: Ensure that code is modular, well-structured, and follows best practices for performance, scalability, and maintainability. • Optimize Web Performance: Focus on improving the performance of web applications through techniques like lazy loading, code splitting, and optimizing assets. • Debug and Troubleshoot: Identify issues, debug problems, and optimize the front-end code for improved speed and reliability. • Contribute to Code Reviews: Participate in code reviews to maintain high coding standards and learn from team members. • Stay Up-to-Date with Front-End Trends: Continuously learn and implement new front-end technologies, techniques, and best practices to improve development efficiency and the quality of the end product.

• Design, develop, and maintain secure cloud-based web applications. • Build and maintain REST and GraphQL APIs supporting enterprise data services. • Develop modern front-end applications using React, Angular, or similar frameworks. • Integrate applications with cloud-native services within AWS and Microsoft Azure environments. • Implement security controls to ensure compliance with FedRAMP and DoD Impact Level requirements. • Support CI/CD pipelines and automated deployment processes. • Collaborate with data engineers, architects, and cybersecurity personnel to deliver integrated solutions. • Troubleshoot and resolve application performance, scalability, and security issues. • Participate in Agile development activities including sprint planning, testing, and code reviews. • Document application architectures, APIs, and deployment procedures.

• Develop and maintain responsive, high-performance web applications using React. • Collaborate with product managers and UX/UI designers to transform concepts into intuitive, user-friendly interfaces. • Write clean, maintainable, and scalable code, adhering to best practices in frontend development. • Optimize applications for maximum speed and performance across various devices and platforms. • Troubleshoot, debug and resolve frontend issues to ensure a smooth user experience. • Work with backend engineers to integrate frontend components with our microservices architecture. • Actively participate in code reviews, offering and receiving feedback to improve code quality. • Stay current with the latest trends and advancements in frontend technologies and contribute to continuous improvement. • Champion the growth of junior engineers by providing dedicated mentorship and actively guiding their technical development.