Frontend Architect - React AI

HCLTech; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

HCLTech is seeking an experienced UI Developer to build time-critical, high-availability UI applications using React and TypeScript. You will work across the full UI development lifecycle, from design through deployment, with emphasis on performance and low-latency interfaces.

The role involves working with modern frontend patterns, state management (Redux), and testing with RTL/Jest, plus exposure to Playwright or Cypress for automation.

Qualifications

• Hands-on experience across the full UI development lifecycle from design to deployment.
• Strong understanding of real-time communication and APIs (WebSockets, SSE, REST).
• Experience with state management and modern frontend architectures (Redux, SPA).

Responsibilities

• Design, develop and test high-performance UI applications.
• Collaborate on architecture for micro-frontends and SPA patterns.
• Implement UI automation and end-to-end tests where appropriate.

Skills

React

TypeScript

WebSockets

SSE

REST APIs

Redux

SPA

RTL/Jest Testing

Tools

Playwright

Cypress

React Testing Library

Jest

Job description

HCLTech is a global technology company, home to 219,000+ people across 54 countries, delivering industry-leading capabilities centered on digital, engineering and cloud, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of $13+ billion.

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Job Description: UI Developer (React, TypeScript and AI)

Role Overview-

We are seeking a highly skilled UI Developer with strong expertise in building time-critical, high-availability, and high-performance applications. The ideal candidate will have hands-on experience across the full UI development lifecycle, including design, development, testing, and deployment.

Technical Skills & Expertise-

Real-Time Communication: Strong understanding of WebSockets, Server-Sent Events (SSE), and REST APIs

State Management & Programming: Solid experience with state management libraries (e.g., Redux) and reactive programming paradigms

Architecture: Strong understanding of micro-frontends and Single Page Applications (SPA)

Testing: Hands-on experience with React Testing Library / Jest for unit and integration testing

UI Automation (Good to Have): Exposure to frameworks like Playwright or Cypress

Desired Experience

Experience working on financial services or trading platforms is an advantage

Strong understanding of performance optimization and low-latency UI applications

Experience with highly available, mission-critical systems.