Senior Front-End React Developer - Contract

The Senior Front-End Developer (SFED) is responsible for designing and writing code and providing support to web applications. The SFED is able to work independently, assuming ownership for the design, interface and programming of simple and complex web sites.  The SFED should also be able to provide solutions and estimates for their tasks in support of his/her Tech Lead  

The SFED works with web applications and a variety of front-end technologies including HTML5, CSS and JavaScript, and is comfortable with content management systems. 

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You will:

• Develop web applications that follow the latest standards and conform with leading-edge front-end technologies.
• Work closely with Creative, Business, Technology, and QA teams to ensure the solution meets the requirements and performance targets (mobile, desktop).
• Responsible for developing web applications and ensuring they follow the overall technical architecture and design established by the technical lead.
• Implement user and business requirements composed of multiple development activities.
• Maintain up-to-date and complete project documentation as dictated by the capability’s 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 to fulfill their tasks and improve their performance and overall technical skills.

 

You have:

• Advanced English Proficiency (B2+ reading, writing, and conversation)
• 4+ years of experience working with front-end technologies, including HTML, CSS, and JavaScript.
• Experience with React.js and other mainstream JavaScript libraries/frameworks (e.g., jQuery, Angular, VueJS).
• Work experience with cross-browser and cross-device compatibility.
• Experience with digital agency projects, web development projects, and SCRUM/Agile methodologies.
• Work experience integrating web solutions with external web services.
• Excellent understanding of recent development practices such as Mobile First, MVC, and Object-Oriented Development.
• Strong knowledge of design patterns (e.g., Model-View-Controller, Observer, Object-Oriented).
• Fluency with data transfer formats and protocols (e.g., JSON, XML, HTTP).
• Knowledge of accessibility standards (e.g., ARIA, WCAG, ADA) and SEO best practices.
• Familiarity with automation and pre-processing tools (e.g., Gulp, Grunt, SASS, LESS).
• Proficiency in pre-processing CSS styling using tools like SASS or LESS.
• Capable of working with version control systems (e.g., Git, SVN, Mercurial).
• Experience with the Atlassian suite (JIRA, Bitbucket, Confluence) is a plus.
• Familiarity with GraphQL, AWS, and Adobe Experience Manager (AEM) is a plus.
• Capable of writing modern, standards-compliant, and accessible code.
• Proficient in building proof-of-concept prototypes.
• Skilled at troubleshooting, debugging, and conducting root cause analysis of web application issues.
• Bachelor’s degree in Computer Science or a related technical discipline, or equivalent experience as a Software Developer is a plus.

 

What We Offer:

• Maternity and parental leave extra days
• Competitive benefits packages
• Vacation, compassionate leave, sick days, and flex days
• Access to online services for families and new parents
• End of year closure days (not deducted form vacation balance)
• Diversity and Inclusion Board with 12 affinity groups
• Internal learning and development programs
• Enterprise-wide employee discounts
• And more…

At Critical Mass, we value our employees and offer competitive compensation and benefits packages.  If you’re looking for a challenging and rewarding opportunity to make a significant impact on the lives of our employees, we encourage you to apply for this exciting position today!

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.

The ask stems from our want to:

Strengthen opportunity for continuous learning
Improve collaboration and team relationships.
Increase employee engagement

This work model balances the need for individual flexibility while maintaining the relentless customer focus we provide at CM. We understand that not everyone may feel comfortable with this expectation, so we ask that you please let us know immediately if there are any concerns so we can help navigate accordingly.

 

Critical Mass is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We do not tolerate discrimination on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status. If you are an individual with disabilities who would like to request an accommodation, please reach out to accommodations@criticalmass.com.

We are committed to fostering diversity, equity, and inclusion within our pool of candidates, with a target of achieving at least 50% representation from underrepresented communities.

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.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