React UI Engineer (TypeScript) – Modernize Legacy VB.NET

Quantum Technologies. LLC

Richardson (TX)

On-site

USD 120,000 - 160,000

Full time

3 days ago

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Job summary

Quantum Technologies LLC in Richardson, TX is seeking an experienced UI Developer with ReactJS and TypeScript expertise to modernize a legacy VB.NET UI by building responsive, user-friendly interfaces that connect to a Java Spring Boot backend.

You will migrate legacy screens, integrate with REST APIs, and collaborate with analysts and developers to ensure feature parity and improved UX. Strong problem solving and communication skills are essential.

Qualifications

6+ years of hands-on experience in ReactJS development.
Experience integrating frontend applications with REST APIs.
Strong knowledge of Redux and Context API for state management.
Experience with Material UI, Bootstrap, or similar UI frameworks.
Proficiency in Git and Agile methodologies.
Experience with Java Spring Boot backend integration.
Hands-on experience migrating legacy applications to modern web platforms is preferred.
Strong problem-solving, debugging, and communication skills.

Responsibilities

Migrate legacy VB.NET UI screens and workflows into modern ReactJS applications.
Integrate frontend applications with Java Spring Boot REST APIs.
Collaborate with business analysts, backend developers, and technical teams to ensure feature parity and improved user experience.
Develop responsive interfaces using UI frameworks such as Material UI and Bootstrap.
Perform unit testing, debugging, code reviews, and performance optimization.
Use Git for version control and participate in Agile development processes.
Support application modernization and migration from legacy platforms to modern web technologies.