We are seeking an experienced and motivated Developer, Front End to join our team. The Developer, Front End will be responsible for delivering front-end tasks, supporting web applications, and translating graphic designs into efficient, high-quality, responsive, and accessible code. This role requires both independent ownership of basic tasks and the ability to collaborate on more complex projects, seeking guidance from senior team members as needed.
You Will:
- Translate graphic designs and wireframes from tools like Figma (or similar) into standard-compliant HTML, CSS, and responsive components.
- Collaborate with Creative, Business, Technology, and QA teams to ensure the delivery of high-quality, punctual web development.
- Implement technical solutions following best practices and maintain clear documentation according to project guidelines.
- Work with a variety of front-end technologies including HTML5, CSS, JavaScript, and popular frameworks.
- Integrate web solutions with external web services (SOAP/REST), content management systems, and third-party applications (API/webhook integration).
- Implement and maintain automation and pre-processing tools (e.g., Gulp, SASS, LESS).
- Ensure cross-browser compatibility and mobile-first, performant code.
- Debug and troubleshoot issues, providing root cause analysis for both simple and complex problems.
- Analyze and optimize code for quality, efficiency, and performance; provide feedback to peers during code reviews.
- Identify and resolve performance and scalability issues, and drive efforts to reduce technical debt.
- Provide progress updates and task estimates to senior or technology leads as required.
You Have:
- Minimum 2+ years of experience working with front-end technologies (HTML/CSS/JavaScript).
- Excellent knowledge of modern development practices (Mobile First, MVC, Object-Oriented Development).
- Experience with cross-browser and responsive development, and general software/unit testing.
- Familiarity with design systems, reusable components, and design translation using Figma or similar tools.
- Experience with version control systems (e.g., Git/GitHub).
- Work experience integrating with APIs, external web services, and content management systems.
- Fluency with data transfer formats and protocols (JSON, XML, HTTP).
- Experience with automation and pre-processing tools (Gulp, SASS, LESS).
- Ability to build proof-of-concept prototypes and optimize code for performance.
- Exposure to full-stack development, including working with databases (SQL), designing/consuming APIs, and monitoring application performance.
- Expertise in troubleshooting, debugging, and root cause analysis.
- Resourceful, critical thinker with a curiosity mindset and strong problem-solving skills.
What We Offer:
- Global maternity and parental leave
- Competitive benefits packages
- Vacation, compassionate leave, wellness days, and flex days
- Access to online services for families and new parents
- 13 affinity groups
- Internal learning and development programs
- Enterprise-wide employee discounts
The Talent Team at Critical Mass is focused on ensuring we provide the best training, onboarding, and employee experience possible! Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. 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.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
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What We Do
We’re Critical Mass. We are 2,000 inspired humans across 14 offices, setting the right path—not just the next one—for our clients, their customers, and our own colleagues. We work with the best, Apple, Adobe, BMW, Nike, Diageo, Airbnb, BNY and many more, to power connected ecosystems that make brands stand out by driving performance with data, technology, AI, creative and media. We’re a global marketing agency founded in Canada, but digital is our home. If you know us, then you know we’re a special place that attracts big talent and tiny egos. We’re driven, uncompromising and we live our values. We’re Critical Mass, but our friends call us CM. Learn more at criticalmass.com.
