Senior UI Developer (React & TypeScript)

About The Role

We are seeking a Senior UI Developer (React & TypeScript) to design, develop, and maintain modern, scalable web applications that deliver exceptional user experiences. In this role, you will leverage React 18+, TypeScript, and modern frontend development practices to build high-performing applications. You will collaborate with cross-functional teams, contribute to architectural decisions, optimize application performance, and ensure the delivery of high-quality software solutions in an agile environment.

Responsibilities

• Design, develop, and maintain scalable web applications using React 18+, leveraging modern features such as hooks, concurrent rendering, and component-driven architecture.
• Build reusable, responsive, and high-performing UI components using JavaScript (ES6+) and TypeScript.
• Integrate frontend applications with backend APIs and services to deliver seamless end-to-end functionality.
• Apply frontend architecture best practices and implement efficient state management solutions using Redux Toolkit, Context API, or Zustand.
• Implement and monitor application telemetry using tools such as Application Insights and OpenTelemetry to track application health, performance, and user behavior.
• Analyze and contribute to KPI reviews, including Core Web Vitals (LCP, CLS, INP), page performance metrics, and user engagement analytics.
• Optimize application performance through techniques such as lazy loading, code splitting, memoization, and efficient rendering strategies.
• Participate in code reviews, unit testing, and troubleshooting activities using tools such as Jest and React Testing Library to ensure high-quality software delivery.
• Collaborate with product owners, business stakeholders, designers, and engineering teams to deliver innovative solutions and enhancements.
• Contribute to continuous improvement initiatives and promote frontend engineering best practices across development teams.

Requirements

• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field.
• Experience developing and maintaining web applications using React 18+.
• Strong proficiency in JavaScript (ES6+) and TypeScript.
• Experience building reusable UI components and integrating applications with RESTful APIs.
• Knowledge of modern state management solutions, including Redux Toolkit, Context API, or Zustand.
• Experience implementing application monitoring and telemetry solutions using tools such as Application Insights or OpenTelemetry.
• Understanding of frontend performance optimization techniques and web performance best practices.
• Experience with software testing frameworks such as Jest and React Testing Library.
• Familiarity with Agile development methodologies and collaborative software delivery practices.
• Strong analytical, problem-solving, and communication skills.

Qualifications

• Experience monitoring and improving Core Web Vitals (LCP, CLS, INP) and frontend performance metrics.
• Expertise in frontend architecture and scalable component design patterns.
• Experience with application observability, telemetry, and user analytics platforms.
• Strong understanding of accessibility, responsive design, and modern web development standards.
• Experience contributing to code reviews, mentoring team members, and driving technical excellence.
• Familiarity with CI/CD practices and modern DevOps workflows.
• Ability to work effectively in Agile/Scrum environments and collaborate across cross-functional teams.
• Passion for continuous learning and staying current with emerging frontend technologies and industry trends.

Skills

• Experience with application observability, telemetry, and user analytics platforms.
• Strong understanding of accessibility, responsive design, and modern web development standards.
• Experience contributing to code reviews, mentoring team members, and driving technical excellence.
• Familiarity with CI/CD practices and modern DevOps workflows.
• Ability to work effectively in Agile/Scrum environments and collaborate across cross-functional teams.
• Passion for continuous learning and staying current with emerging frontend technologies and industry trends.

Benefits

• The annual salary for this position is between $68,442 to $114,000 depending on experience and other qualifications of the successful candidate.
• This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans.
• Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
• Medical/Dental/Vision/Life Insurance
• Payed holidays plus Paid Time Off
• 401(k) plan and contributions
• Long-term/Short-term Disability
• Paid Parental Leave
• Employee Stock Purchase Plan