UI Developer (ReactJS)

Job Title : UI Developer (ReactJS) – Legacy Modernization

Primary Skill : React JS, TypeScript, Git

Experience : 8 years

Job Description :

Job Requirements UI Developer (ReactJS) – Legacy Modernization

Location: Richardson, TX (Hybrid) – Only locals

Employment Type: Contract (6 Months)

Experience Level: Senior (8+ Years)

Role Overview

• 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 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.

Required Qualifications

• 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.

Preferred Qualifications

• Prior experience in legacy system modernization (specifically migrating desktop or monolithic applications like VB.NET/WinForms to modern web stacks).
• Familiarity with Java Spring Boot architecture to facilitate smoother backend integration.
• Experience implementing automated testing frameworks for React (Jest, React Testing Library).

Core Technical Stack

• Frontend: ReactJS, TypeScript, JavaScript, HTML5, CSS3, Redux / Context API, Material UI
• Backend Integration: REST APIs, Java Spring Boot
• DevOps & Process: Git, Agile / Scrum Methodologies