Senior Full Stack UI Engineer (5+ Years in React.js, TypeScript/JavaScript and RESTful APIs)

Job Title Senior Full Stack UI Engineer Intro: We are FIS. Our technology powers the world’s economy and our teams bring innovation to life. We champion diversity to deliver the best products and solutions for our colleagues, clients and communities. If you’re ready to start learning, growing and making an impact with a career in fintech, we’d like to know: Are you FIS?

As a 5, you will design, develop, and enhance scalable web applications that deliver exceptional user experiences and support critical business outcomes. You will collaborate with product, user experience, engineering, and architecture teams to build modern, secure, and high-performing solutions. Success in this role requires balancing technical excellence with customer-centric design, driving architectural decisions, and contributing to the continuous evolution of engineering standards and best practices.

Design and develop responsive, scalable web applications using modern front-end technologies and frameworks. Partner with product and user experience teams to translate business requirements into intuitive digital experiences. Drive application architecture, technical design, and development best practices for front-end and full stack solutions. Build reusable, maintainable components that improve development efficiency and consistency. Develop and integrate RESTful APIs and backend services to support application functionality and performance. Optimize application performance through effective caching strategies, monitoring, and continuous improvement. Implement secure authentication, authorization, and data protection practices across applications. Collaborate with cross-functional teams to resolve technical challenges and deliver high-quality software solutions. Support production environments through troubleshooting, root cause analysis, and continuous enhancement initiatives. Contribute to code reviews, testing strategies, documentation, and knowledge sharing within the engineering organization.

Demonstrated 5+ Years experience developing modern web applications using React.js and TypeScript/JavaScript. Strong understanding of user-centered design principles and front-end application development. Expertise in designing scalable, maintainable, and high-performing software architectures. Experience building and consuming RESTful APIs and integrating distributed services. Knowledge of authentication protocols, application security principles, and secure coding practices. Experience working with relational databases such as PostgreSQL, Oracle, or similar technologies. Proficiency in software development lifecycle practices, including testing, code reviews, and CI/CD workflows. Strong analytical, problem-solving, communication, and collaboration skills with the ability to influence technical decisions.

Experience with Angular or additional modern front-end frameworks. Experience with Node.js and backend frameworks such as Express. Knowledge of functional programming concepts and frameworks. Experience developing and supporting Software-as-a-Service (SaaS) platforms. Experience with front-end build, automation, and DevOps tooling. Hands-on experience with unit, integration, and end-to-end testing frameworks. What We Offer you At FIS, you can grow your career as far as you want to take it. Here’s what else we offer: Opportunities to make an impact in fintech Personal and professional learning Inclusive, diverse work environment Resources to give back to your community Competitive salary and benefits Privacy Statement FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice . Sourcing Model Recruitment at FIS works primarily on a direct sourcing model; a relatively