Senior Developer, React

Critical Mass; Toronto; Hybrid; CAD 80,000 - 100,000; Part time

Job summary

A leading digital agency based in Toronto is seeking a Senior Front-End Developer on a contract basis. You will collaborate with a team to convert designs into responsive components and ensure high-quality user experiences. Ideal candidates have 5-7 years of front-end experience and are fluent in React and Tailwind. This role requires a commitment to working from the Toronto office on designated days.

Qualifications

• 5-7 years of experience with Front-End technologies.
• Fluency in React.js and Tailwind.
• Experience with automation tools like Gulp and Grunt.

Responsibilities

• Develop web applications using front-end technologies.
• Collaborate with QA teams to meet performance targets.
• Maintain documentation aligned with guidelines.

Skills

HTML/CSS/JavaScript

ReactJS

Tailwind

Cross-browser Compatibility

Version Control Systems

APIs

Cloud Knowledge

Tools

Gulp

Grunt

SVN/GIT

Job description

Overview

Critical Mass is looking for a skilled and experienced Senior Front-End Developer to join our team on a contract basis! In this role you will work with a team of creative individuals while also collaborating closely with your Tech Lead to translate Figma designs into responsive production-ready components using React and Tailwind CSS. This is a hands-on role where your creative flair and strong front-end fundamentals will directly shape the user experience for customers of our New York-based financial services client.

Please note that this is a contract role with a projected end date of October 31 2025.

Contract details

Our new hires & employees are the future of our organization and we want to set you up for long-term an effort to do so we expect our team to work from the Toronto office on Tuesdays and Thursdays.

Note: this is a contract role with an anticipated end date of October 31 2025.

You will

• Develop web applications that follow the latest web standards and conform to leading-edge front-end technologies
• Work closely with the Creative Business Technology and QA teams to ensure the solution meets the requirements and performance targets (mobile and desktop).
• Own the development of web applications and ensure they follow the overall technical architecture and design established by the technical lead
• Implement user and business requirements which are composed of multiple development activities
• Maintain up-to-date and complete documentation on projects as dictated by the capabilitys guidelines and best practices
• Debug or troubleshoot complex issues in existing web applications
• Proactively provide feedback on policies and procedures when an opportunity for improvement exists
• Proactively provide guidance and support to other members in fulfilling their tasks and improving their performance and overall technical skills.

You have

• At least 5-7 years of experience working with Front-End technologies (HTML / CSS / JavaScript)
• Fluency in ReactJS & Tailwind
• Excellent knowledge of recent development practices (Mobile First MVC Object Oriented development)
• Work experience with cross-browser and cross-device compatibility
• Work experience with automation and pre-processing tools (e.g. Gulp Grunt LESS)
• Work experience integrating web solutions with external web services
• Knowledge of design patterns (e.g. model-view-controller observer object-oriented etc.)
• Fluency with data transfer formats and protocols popular in web applications (e.g. JSON XML HTTP)
• Experience writing code compliant with modern accessibility (e.g. ARIA WCAG Microformats ADA RDF) and SEO guidelines and best practices
• Experience working with version control systems (SVN GIT Mercurial)
• Experience building proof-of-concept prototypes
• Experience troubleshooting debugging and doing root cause analysis of web application issues
• Cloud knowledge : AWS Azure etc.
• Desirable : Experience in Digital Agencies projects web development projects SCRUM / Agile software projects

Critical Mass is an equal opportunity employer.

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs and . We will not use apps such as Facebook Messenger WhatsApp or Google Hangouts for communicating with you. We will never ask you to send us money technology or anything else to work for our company. If you believe you are the victim of a scam please review your local government consumer protections guidance and reach out to them directly.

Experience:

Senior IC

Key Skills

APIs, REST, Spring, SOAP, .NET, React, Node.js, Angular, J2EE, JavaScript, Web Services, Java

Employment Type: Full Time

Experience: years

Vacancy: 1