Summary
✨ AI‑Generated
A senior React.js developer is sought to build and scale customer-facing and internal web applications in a high-volume, regulated payment environment. Responsibilities include designing scalable frontend architecture, creating reusable and well-tested components, translating UI/UX designs into responsive interfaces, collaborating with product, design, backend, DevOps, and QA teams, and mentoring other developers.
Highlights
Senior frontend role with significant ownership of complex, high-traffic applications and architecture. The position offers exposure to secure payment flows and third-party integrations, cross-functional collaboration, and opportunities to mentor developers and shape frontend engineering practices.
Description
BettingJobs is working with a fast-growing platform operating in high-volume, regulated payment environments, looking for a Senior React.js Developer to help build and scale its customer-facing and back-office applications.
This is a genuine opportunity to take ownership of complex, high-traffic frontend architecture within a business that's investing heavily in product, security and data.
The role would suit an experienced React specialist who thrives on technical challenge and wants exposure to real payment flows, third-party integrations and secure, high-transaction systems.
You'll work closely with Product, UI/UX, Backend, DevOps and QA to deliver polished, performant applications, while mentoring junior and mid-level developers and helping shape frontend best practice across the team.
Responsibilities:
Design, build and maintain scalable, high-performance applications using React.js, with reusable, well-tested components and architectureTranslate UI/UX designs into responsive, user-friendly interfacesIntegrate frontend applications with REST APIs and third-party services, including payment providers, wallets, banking, KYC and authenticationCollaborate with backend teams (Java, C#) and work with real-time technologies such as WebSockets where requiredImplement secure frontend practices around authentication, authorisation and API communicationOptimise performance, load times and browser compatibility, and work within Docker-based development environmentsPartner with DevOps on CI/CD and deployment, troubleshoot production issues, and contribute to architecture discussions and code reviewsMentor junior and mid-level developers
Requirements:
7+ years' professional development experience with strong hands-on React.js expertise, plus JavaScript/TypeScript, HTML5/CSS3 and component-based architectureStrong grasp of modern React (Hooks, Context API, state management, performance optimisation, lazy loading/code splitting) and tools such as Redux, Redux Toolkit or ZustandExperience with frontend testing (Jest, React Testing Library, Playwright)Solid Node.js experience, with strong understanding of RESTful APIs, JSON, JWT/OAuth2 and API securityPrevious experience in Payments, Banking, FinTech or similar high-transaction environments, including deposit/withdrawal flows, payment provider integrations, webhooks and transaction status handlingAdvantageous: KYC/AML or identity verification integrations, microservices architecture, Kubernetes, AWS/GCP/Azure, OWASP knowledge, and experience with iframe-based or embedded applications
