Web Full Stack Developer | Hagerstown, MD, USA

Web Full Stack Developer Calling all innovators - find your future at Fiserv. We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv. Job Title Web Full Stack Developer About

: Join the Client Services technology team as a Full-Stack Web Developer to build and enhance the high-value, data-driven applications that power our global support operations. In this role, you will work across a modern tech stack-utilizing React and TypeScript on the front end alongside C# and ASP.NET Core on the back end-to turn complex business data workflows into secure, scalable, and intuitive user experiences. By partnering with cross-functional business and technical teams, your engineering output will directly improve operational readiness, speed-to-market, and the overall efficiency of our client-facing services ecosystem.

: • Design, develop, and maintain responsive web applications using React and ASP.NET Core to support modern Single Page Application (SPA) experiences. • Build, evolve, and support robust RESTful APIs and backend microservices in C# with a strong emphasis on maintainability, scalability, and clean architecture. • Translate complex business needs into well-structured technical solutions, including UI workflows, API contracts, and performant data models. • Develop, optimize, and maintain SQL Server database schemas, T-SQL queries, stored procedures, and advanced indexing strategies to support high-volume data use cases. • Implement enterprise-grade security practices, including secure coding patterns, robust authentication/authorization protocols, and least-privilege access controls. • Create reusable, tested front-end components and backend services using modular design patterns that facilitate long-term codebase health. • Collaborate closely with product owners, technical analysts, and cross-functional support teams to reliably deliver features from concept and build to release and support. • Participate actively in code reviews, system troubleshooting, performance tuning, and production monitoring to ensure top-tier software quality. • Contribute to essential technical documentation, including design notes, operational runbooks, and supportability guides to enhance team velocity. •