Senior Frontend Developer

Senior UI Developer (React)Environment: On-Prem Enterprise (.NET / C# Backend)Level: Senior / Lead ContributorGreenfield Modernization InitiativeOverviewWe are hiring a Senior UI Developer to lead the design and development of modern, enterprise-grade React applications. This role is heavily front-end focused (60–70% React) with 30–40% hands-on C#/.NET backend contribution.This is a true greenfield opportunity — rebuilding legacy applications from scratch using modern technologies and best practices. The ideal candidate is a senior-level engineer who can architect front-end solutions, establish reusable libraries, and work directly with business stakeholders to deliver clean, intuitive user experiences. This is not a maintenance role and not a pure backend position. We are looking for a senior React expert who can lead from the front technically.ResponsibilitiesDesign and build scalable React applications from the ground upArchitect front-end structure, state management, and component librariesLead modernization efforts replacing legacy systemsOwn UI standards, patterns, and reusable componentsTranslate business requirements directly into functional and polished UI solutionsWork directly with stakeholders to understand workflows and user needsDevelop and integrate REST APIs using C#/.NETContribute to backend services where needed (30–40%)Mentor developers and provide technical direction on UI best practicesEnsure performance, maintainability, and scalability of solutionsRequired Qualifications7+ years of software development experience4+ years deep hands-on experience with React (SPA architecture)Strong understanding of modern JavaScript / TypeScriptExperience architecting front-end solutions — not just building featuresExperience building reusable component librariesSolid experience with C# and .NET (API development, integration)Experience working directly with business stakeholdersStrong communication skills and ability to lead technical discussionsExperience modernizing or rebuilding legacy systemsWhat This Role IsSenior-level, hands-on builderFront-end owner and technical leaderDesign-minded engineer without reliance on a UX teamComfortable operating in an on-prem enterprise environment