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Added 5 mins ago
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Closed listing

Kelly

Sr. UI Developer – React / Angular | GenAI & LLM

Mississauga, ON, Canada

Contract

This opening has closed.

The original listing is kept below for reference.

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About employer

Job details

Job type: Contract
Closing date: Nov 5, 2026
Posting language: English
Posted: Oct 6, 2026

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Original job description

Archived listing. The details below describe a past opening.

Initially remote but then onsite from Mississauga, ON.

ONSITE INTERVIEW MUST

We are looking for a highly experienced Senior UI Developer to design and develop modern, responsive, and scalable web applications. The ideal candidate will have strong front-end development experience with React and/or Angular, excellent JavaScript skills, and the ability to collaborate closely with backend developers and UX teams.

Key Responsibilities

Design, develop, and enhance modern web applications and user interfaces.
Build reusable, scalable, and maintainable UI components.
Collaborate with backend developers, UX/UI teams, and other technical stakeholders.
Develop responsive and high-performance applications using modern front-end technologies.
Participate in application architecture, technical design, and development discussions.
Integrate front-end applications with backend services and REST APIs.
Troubleshoot, optimize, and improve application performance and responsiveness.
Contribute to secure and scalable front-end solutions.
Work with emerging technologies, including Generative AI and LLM-based solutions, where applicable.

Required Qualifications

8+ years of professional UI / front-end development experience.
2+ years of hands-on React experience is required.
Strong experience with React and/or Angular.
Strong knowledge of JavaScript and/or TypeScript.
Solid experience with HTML5 and CSS3.
Experience developing modern, responsive web applications.
Strong understanding of reusable UI components and front-end development practices.
Excellent communication and collaboration skills.

Preferred Qualifications

Experience with Angular and modern JavaScript libraries/frameworks.
Experience with Spring Boot or working closely with Java/Spring backend teams.
Experience integrating applications with REST APIs.
Exposure to Generative AI, LLMs, or AI-powered applications.
Experience with full-stack development is a plus.
Experience working in enterprise-scale application environments.

About employer

More about this job

Responsibilities

Design, develop, and optimize responsive, scalable web applications and reusable UI components using modern front-end technologies. Collaborate with backend and UX teams, integrate REST APIs, contribute to technical design and secure solutions, and explore applicable Generative AI and LLM technologies.

Requirements

Requires 8 or more years of professional UI or front-end development experience, including at least 2 years of hands-on React experience, with strong React and/or Angular, JavaScript and/or TypeScript, HTML5, and CSS3 skills. Candidates should have experience building responsive applications and reusable components, and strong communication and collaboration skills; Angular, Spring Boot, REST API integration, AI/LLM exposure, full-stack work, and enterprise environments are preferred.

Skills

React
Angular
JavaScript
TypeScript
HTML5
CSS3
Responsive Web Development
UI Component Development
REST APIs
Front-End Architecture
Application Performance Optimization
Generative AI
Large Language Models
Spring Boot
Full-Stack Development

Visa sponsorship

Not detected in the job text

Keywords

React
Angular
JavaScript
TypeScript
HTML5
CSS3
Front-End Development
User Interface Development
Responsive Web Applications
Reusable UI Components
REST APIs
Backend Services
Application Architecture
Technical Design
Application Performance
Secure Solutions
Generative AI
Large Language Models
Spring Boot
Java
Full-Stack Development
Enterprise Applications
UX/UI Collaboration
Banking
Investment Banking
Financial Services

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