Backend developer Jobs in Mississauga, ON

Our client, is seeking a high-performing Sr. Frontend Developer to join their core digital products group.

In this strategic frontend role, you will lead the development and evolution of cutting-edge, user-facing digital applications using modern microfrontend architectures and TanStack. Operating in a fast-paced, AI-forward environment, you will heavily leverage Large Language Models (LLMs) on a daily basis to accelerate feature design, code generation, and optimization. Working closely with UI/UX designers, product managers, and backend engineers, you will build responsive, accessible web applications utilizing React.js/Next.js, integrate RESTful APIs, manage cloud deployments on AWS (Amplify, CloudFront), and enforce strict CI/CD quality standards across the software delivery lifecycle.

Duration: 6-Month Contract (with high potential for extension)




Advantages

Cutting-Edge Architecture Scope: Direct the development of scalable, modular web applications utilizing modern microfrontend patterns and TanStack libraries.

AI-Forward Development Ecosystem: Actively integrate Large Language Models (LLMs) into your daily workflow to accelerate development, testing, and feature delivery.

Modern Cloud Sandbox: Deploy and manage resilient frontend applications using top-tier AWS cloud services (AWS Amplify, CloudFront).

High-Visibility Enterprise Impact: Build high-performance, accessible digital experiences serving millions of enterprise and consumer end-users.



Responsibilities
Frontend Architecture & Development: Develop, maintain, and optimize modern, scalable frontend interfaces using Microfrontends, TanStack, React.js, and Next.js.

AI Tooling & Daily LLM Integration: Utilize Large Language Models (LLMs) on a daily basis to optimize code quality, streamline debugging, and accelerate development cycles.

API Integration & Cloud Deployment: Build and consume RESTful APIs to integrate frontend interfaces with backend microservices; manage deployments via AWS Amplify and CloudFront.

Quality Assurance & CI/CD: Implement automated unit, integration, and UI testing suites; collaborate within CI/CD pipelines to automate build, testing, and release workflows.

Cross-Functional Collaboration: Partner with product managers and designers using Jira and GitLab to translate design mockups into responsive, accessible, and user-friendly web applications.



Qualifications
Frontend Experience: Senior-level experience as a Frontend Developer building complex, enterprise-grade web applications.

Microfrontends & TanStack Depth: Proven, hands-on experience developing microfrontends and utilizing TanStack state/query management libraries (Must-Have).

Daily LLM Experience: Demonstrated, heavy experience leveraging LLMs (e.g., ChatGPT, Copilot, or specialized coding assistants) in day-to-day engineering workflows (Must-Have).

Modern JavaScript Frameworks: Deep proficiency in React.js, Next.js, HTML5, CSS3, and modern JavaScript/TypeScript.

API & Database Familiarity: Experience building/consuming RESTful APIs and working alongside relational or NoSQL databases (MySQL, PostgreSQL, MongoDB).

Cloud & Tools Proficiency: Hands-on experience with AWS (Amplify, CloudFront), CI/CD pipelines, Jira, and GitLab.



Summary
If you are a tech-savvy Sr. Frontend Developer who pairs deep microfrontends and TanStack expertise with daily LLM usage and React/Next.js proficiency, this 6-month contract opportunity is an ideal next step. Bring your modern web engineering skills, AI-driven productivity, and collaborative mindset to our client's digital engineering team today!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.