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Kelly

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

  • Mississauga, ON, Canada

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Job type
Contract
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Posting language
English
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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

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Categories

  • Software
  • Technology
  • Finance & Accounting

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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