Frontend Architect - React AI in London

Energy Jobline ZR; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

HCLTech is seeking a highly skilled UI Developer with strong expertise in React, TypeScript and AI to build time-critical, high-availability applications. The role covers the full UI development lifecycle from design to deployment, with emphasis on performance and low latency.

The ideal candidate will have hands-on experience across front-end technologies, state management, and testing, with exposure to Playwright or Cypress as a good-to-have.

Qualifications

• Hands-on experience across the full UI development lifecycle (design, development, testing and deployment).
• Strong front-end expertise with modern web technologies and SPA patterns.
• Experience with high-performance, time-critical UI applications is preferred.

Responsibilities

• Build and maintain high-quality UI components using React and TypeScript.
• Collaborate across teams to design scalable, low-latency front-end solutions.
• Contribute to testing strategies using React Testing Library or Jest.

Skills

HTML

CSS

JavaScript

React

TypeScript

Tools

Playwright

Cypress

Job description

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-

Frontend Technologies: Expert-level proficiency in HTML, CSS, JavaScript, React, and TypeScript

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.