Senior React UI Developer (D3.js, Micro Frontend)

Location: Montreal, QC, Canada (Onsite)

Employment Type: Contract

Experience: 8+ Years

Job Overview

We are seeking an experienced Senior React UI Developer to join our team for an exciting onsite opportunity in Montreal. The ideal candidate will have strong expertise in React.js, modern JavaScript, and building scalable, high-performance frontend applications. Experience with D3.js for complex graph visualization, Micro Frontend architecture, and automated UI testing is essential.

Key Responsibilities

- Design, develop, and maintain responsive web applications using React.js.

- Build interactive dashboards and complex data visualizations using D3.js.

- Develop scalable applications using Micro Frontend architecture.

- Write clean, reusable, and maintainable frontend code following best practices.

- Integrate frontend applications with REST APIs and backend services.

- Create and maintain automated UI test cases using Cypress and/or Selenium.

- Collaborate with product owners, UX designers, QA,



and backend developers in an Agile workplace.

- Troubleshoot, optimize, and improve application performance and user experience.

- Participate in code reviews and contribute to technical design discussions.

Required Skills
- 8+ years of professional frontend development experience.

- Strong expertise in React.js and modern JavaScript (ES6+).

- Experience with D3.js and complex graph/data visualization.

- Hands-on experience with Micro Frontend architecture.

- Experience with Cypress and/or Selenium for UI automation testing.

- Strong knowledge of HTML5, CSS3, REST APIs, and Git.

- Excellent analytical, problem-solving, and communication skills.

Preferred Skills
- Experience with TypeScript.

- Experience working in Agile/Scrum environments.

- Familiarity with CI/CD pipelines and cloud-based applications.

- Experience optimizing frontend performance for enterprise applications.

📌 Senior React UI Developer.js, Micro Frontend) (Quebec City)
🏢 Umanist Staffing
📍 Quebec City