UI Developer (ReactJS) – Legacy Modernization

Location: Richardson, TX (Hybrid)

Employment Type: Contract (6+ Months)

Experience Level: Senior (8+ Years total frontend development experience)

Position Summary: We are seeking a Senior UI Developer (ReactJS) to drive the frontend modernization of a legacy VB.NET enterprise application into a modern, responsive web application backed by Java Spring Boot microservices. The ideal candidate will translate complex legacy screens and business workflows into intuitive, high-performance user interfaces while maintaining functional parity and optimizing the overall user experience.

Key Responsibilities: Modernization & Migration: Convert legacy VB.NET UI screens and complex business workflows into modern, high-performance ReactJS applications. Frontend Development: Build clean, reusable, and accessible components using ReactJS, TypeScript, JavaScript, HTML5, and CSS3.API Integration: Seamlessly connect frontend components with secure Java Spring Boot RESTful APIs and microservices. Quality & Performance: Conduct unit testing, cross-browser debugging, performance tuning, and code reviews to ensure reliability and scalability. Cross-Functional Collaboration: Partner closely with UI/UX designers, backend engineers, product owners, and business stakeholders to ensure smooth delivery in an Agile environment.

Experience: 8+ years of hands-on frontend software development with a focus on ReactJS in enterprise settings. Core Web Technologies: Deep proficiency in JavaScript (ES6+), TypeScript, HTML5, CSS3, and REST API integration. State & UI Management: Proven experience with state management libraries (Redux, Context API) and UI component frameworks (Material UI, Bootstrap, or similar).Tooling & Process: Hands-on experience with Git version control and modern build tools within an Agile/Scrum delivery model