Sr. React Developer (80% Frontend / 20% Backend)

We are At Synechron, we believe in the power of digital to transform businesses for the better. Our global consulting firm combines creativity and innovative technology to deliver industry-leading digital solutions. Synechron’s progressive technologies and optimization strategies span end-to-end Artificial Intelligence, Consulting, Digital, Cloud & DevOps, Data, and Software Engineering, servicing an array of noteworthy financial services and technology firms. Through research and development initiatives in our FinLabs we develop solutions for modernization, from Artificial Intelligence and Blockchain to Data Science models, Digital Underwriting, mobile-first applications and more. Over the last 20+ years, our company has been honored with multiple employer awards, recognizing our commitment to our talented teams. With top clients to boast about, Synechron has a global workforce of 14,500+, and has 58 offices in 21 countries within key global market We are seeking a highly skilled Senior Full Stack Developer with a strong emphasis on Frontend development (80%) and supporting Backend development (20%) . The ideal candidate will have extensive experience building enterprise-grade web applications using React, TypeScript, JavaScript, and modern UI frameworks , along with hands-on experience in Java Spring Boot for developing and integrating REST APIs. The candidate should be passionate about creating responsive, scalable, and high-performance applications while collaborating closely with product owners, UX designers, architects, and backend teams. Key Responsibilities Design and develop enterprise-grade web applications using React, TypeScript, JavaScript, HTML5, and CSS3 . Build reusable UI components using React Hooks, Context API, and modern frontend architecture. Develop responsive and accessible user interfaces following enterprise UI standards. Consume and integrate RESTful APIs and backend services. Develop and maintain backend services using Java Spring Boot . Implement secure authentication and authorization (OAuth2, JWT, SSO). Participate in application modernization and migration initiatives. Optimize application performance using lazy loading, code splitting, and caching techniques. Collaborate with UX, Product, QA, and backend teams throughout the SDLC. Write unit and integration tests to ensure application quality. Participate in Agile ceremonies, sprint planning, and code reviews. Required Skills Frontend (80%) React.js (React 18/19) TypeScript JavaScript (ES6+) HTML5 CSS3 / SCSS Bootstrap / Material UI Redux / Context API React Hooks React Router REST API Integration Responsive Web Design Micro Frontend Architecture State Management Cross-browser compatibility Accessibility (WCAG) Backend (20%) Java 17+ Spring Boot RESTful Web Services Microservices Spring Security OAuth2 / JWT Hibernate / JPA Additional Skills Git Jenkins Docker Azure DevOps or GitHub Actions SQL MongoDB or PostgreSQL Agile/Scrum CI/CD Nice to Have AI integration experience (Claude, OpenAI, Amazon Q, Copilot, etc.) GraphQL React Query / TanStack Query Module Federation Banking or Financial Services domain experience Qualifications Bachelor's degree in Computer Science, Information Systems, or a related field. 10+ years of software development experience. Strong experience developing enterprise-scale React applications. Experience building scalable Java Spring Boot microservices. Excellent communication and stakeholder management skills.