We are looking for an experienced and motivated Senior Front-End Developer (Sr.FED). The Sr.FED is responsible for completing front-end tasks and providing support to web applications. The Sr.FED is able to work independently in basic tasks, assuming ownership for the design and programming required. For more complex work, this individual will rely on existing designs and seek guidance from more senior positions. The Sr.FED should also be able to provide constant progress status to a senior level as needed and estimates for his tasks, that must be approved by his senior or technology lead of the current project.

A Sr.FED works with web applications and a variety of front-end technologies including HTML5, JavaScript and is comfortable with content management systems platforms.

You will:

• Responsible for translating graphic designs delivered in composition documents into standard-compliant HTML and CSS
• Collaborate in implementing data exchange between application layers via AJAX.
• Work closely with Creative, Business, Technology and QA teams to ensure quality and punctual web development.
• Translate graphical designs and wireframes into fully styled markup code.
• Implement technical solutions following the Capability’s best practices.
• Debug or troubleshoots simple issues in existing web applications.
• Provide feedback on policies and procedures when an opportunity for improvement exists.
• Proactively provide coaching and support to other members of the in fulfilling their tasks and improving their performance and overall technical skills.
• Ensure concise and clear documentation is maintained by all peers for the projects as dictated by each Capability’s guidelines and best practices.
• Debug or troubleshoot complex or critical issues that cannot be handled by junior positions, and provides root cause analysis.

You have:

• Advanced English level (B2+/C1).
• Minimum of 3+ years of experience with Front-End technologies, with a strong emphasis on ReactJS.
• Proficiency in cross-browser and responsive development.
• Familiarity with recent development practices (Mobile First, MVC, Object-Oriented development).
• Experience with popular JavaScript frameworks, automation tools (e.g., npm, Webpack, SASS), and cross-browser compatibility.
• Advanced knowledge of front-end technologies, design patterns, and mainstream libraries and frameworks.
• Ability to work with version control systems (GIT) and integrate web solutions based on a Content Management System (CMS).
• Strong troubleshooting and debugging skills, with the ability to conduct root cause analysis of web application issues.
• Fluency with data transfer formats and protocols popular in web applications (eg. JSON, XML, HTTP)
• Capable of writing code compliant with modern accessibility (eg. ARIA, WCAG, Microformats, ADA, RDF) and SEO guidelines and best practices
• Capable of building proof of concept prototypes
• Capable of consuming, parse and translate SOAP or REST web services
• Demonstrated examples of your front-end development work (we want to see your best website, app, and interface work)  
• Familiarity with design tools such as Figma, Sketch, and the Adobe Creative Suite  
• BS in Computer Science or a related technical discipline; or equivalent strong experience as a Software Development Lead, desirable
• Experience in Digital Agencies projects, Web development projects, SCRUM/Agile software projects, desirable.

The Talent Team at Critical Mass is focused on ensuring we provide the best training, mentorship, and employee experience possible!  CM 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

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#avoidIf Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.htmlIf U.K. based: https://www.gov.uk/consumer-protection-rightsIf Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx