Senior Front End Web Developer Jobs in Ontario (NOW HIRING)

Position Summary:

TrendAI is seeking a skilled Applied AI Sr. Front-end Developer to help design and implement new micro-frontend web applications for Trend Vision One. As we expand the teams of front-end developers and creating front-end experiences at scale, you will be a key driver in building well-designed, well-architected interfaces that delight our customers.

A primary focus of this role is the adoption of AI-enabled development and agentic architectures. You will help shape the future of our UI architecture by leveraging AI tools to accelerate prototyping and delivery, ensuring our security innovations are presented through a modern, high-performance interface. We are looking for a results-oriented "owner" who is proactive in identifying opportunities to improve our developer experience through emerging AI technologies.

Is this role for you? This position builds interactive web applications: dashboards, security consoles, and data-dense SaaS interfaces for Trend Vision One Cybersecurity Platform. If you don't have hands-on, production experience architecting stateful, interactive applications, or if you're more excited about building public-facing marketing or content websites (Astro-based, CMS-driven, SEO-focused), take a look at our Applied AI Sr. Web Developer or Applied AI Junior Web Developer postings instead. (There's more on how the two tracks connect under "Cross-Role Opportunity" below!)

Responsibilities:

• AI-Augmented Implementation: Design and implement modular micro-frontend web applications using AI coding assistants (e.g., Claude Code, Kiro, Copilot) to accelerate development, converting visual designs into high-quality applications using component libraries and explore multiple UI patterns in parallel.

• Agentic UI Architecture: Contribute to the evolution of our front-end systems with a keen interest in building for microservices and agentic architectures.

• End-to-End Ownership: Take ownership of tasks from inception to completion, writing clean, efficient, and maintainable code in TypeScript, JavaScript, React, or Web Components.

• Productivity Optimization: Expertly use ethical AI tools to enhance personal and team productivity, reducing time-to-market for complex security dashboards and tools.

• Testing & Quality: Lead a test-driven approach by incorporating unit tests and employing end-to-end frameworks such as Cypress or Playwright. Utilize AI to construct comprehensive test suites and address edge cases, while developing and coordinating a team of AI agents to perform testing and continually improve coverage.

• Collaborative Leadership: Work closely with UX designers and backend engineers to translate visual designs and multi-SaaS integration requirements into seamless front-end experiences.

• Mentorship: Empower and inspire others to level up their technical skills, particularly in the safe and effective use of AI-enabled development workflows.

• Continuous Improvement: Proactively manage uncertainties and identify opportunities for architectural growth, staying current with the modern front-end ecosystem (e.g. visualization, signal, browser APIs etc.).
  

Qualifications:

• What to show us: A portfolio, GitHub, or live demo of interactive web applications you've built (dashboards, admin consoles, data tools, or SPAs with real interactivity).

• Experience: Significant experience architecting rich, stateful web applications in React or other application-oriented frameworks/libraries (e.g. Next.js, D3, Sigmajs). This role is about building interactive tools, dashboards with visualization.

• AI Tooling Proficiency: Proven experience using AI tools to enhance productivity and a willingness to experiment with modern AI web technologies (e.g. CopilotKit, AG-UI protocol, AI SDKs).

• Technical Ecosystem: Skilled with modern front-end build tools (e.g. Vite, Webpack), linters, and package managers (npm/yarn).

• Testing Mastery: Deep expertise in TDD and end-to-end test automation frameworks.

• Cloud Awareness: Knowledge of containerization (Docker) and experience or interest in cloud services (AWS S3, CloudFront) and Infrastructure as Code (AWS CDK).

• Soft Skills: Exceptional attention to detail, a proactive approach to problem-solving, and a growth mindset.

• Bonus: Experience with localization/internationalization and accessibility (WCAG) best practices for enterprise-scale SaaS.

Cross-Role Opportunity:

This posting is scoped to front-end work on our Cybersecurity Platform, and that's the bar we're hiring against. Our front-end development team (interactive web applications) and web development team (public websites) share the same leadership, mentorship, AI tooling, and technical support, so depending on project needs and your interests, there may be an opportunity to move into web development work. Please apply based on the experience you have today.