Front-End Developer at Critical Mass

At Critical Mass, we believe that the best digital experiences are built by people who are as passionate about craft as they are about collaboration. We are a global agency dedicated to creating meaningful connections between brands and their customers through innovative design and technology. Our team thrives on a culture of curiosity, where we prioritize continuous learning and genuine human connection. We are looking for a dedicated Front-End Developer to join our team in Costa Rica, someone who is ready to turn complex ideas into seamless, functional realities while growing alongside a group of talented, supportive peers.

The opportunity

As a mid-level Front-End Developer, you will serve as a vital link between creative vision and technical execution. Your role is to take ownership of front-end tasks, ensuring that our web applications are not only beautiful but also robust and performant. You will work independently on foundational projects, while also having the support of senior leads for more intricate challenges. This position is perfect for someone who enjoys the balance of hands-on coding and strategic problem-solving, fitting into our hybrid work environment where we value both individual focus and the energy of in-person collaboration.

A day in the life

• You will translate intricate graphical designs and wireframes into clean, fully styled markup code that brings our creative concepts to life.
• You will collaborate across various disciplines, working closely with our creative, business, and quality assurance teams to ensure every project is delivered punctually and to a high standard.
• You will act as a technical problem-solver, debugging existing web applications and implementing data exchange between application layers using AJAX.

Who you are

You are a skilled developer with at least two years of professional experience focusing on front-end technologies. You possess a deep understanding of HTML, CSS, and JavaScript, and you are comfortable navigating the complexities of cross-browser and responsive development. Your background includes:

• An advanced level of English, allowing you to communicate clearly within our global team.
• Experience with automation and pre-processing tools such as Webpack, Gulp, SASS, or LESS.
• A solid grasp of design patterns, data transfer formats like JSON and XML, and modern accessibility and SEO best practices.
• The ability to troubleshoot, debug, and conduct root cause analysis to maintain the integrity of our web platforms.
• A proactive mindset that enjoys exploring new technologies and building proof-of-concept prototypes.

Why you'll love it here

We are committed to the well-being and long-term success of our employees. Our culture is built on inclusivity, supported by our Diversity and Inclusion Board and various affinity groups. When you join us, you will enjoy a comprehensive package of perks designed to support your work-life balance and professional growth.

• Flexible hybrid work arrangements to support your personal and professional needs.
• Generous time off, including vacation days, compassionate leave, sick days, and dedicated end-of-year closure days.
• Enhanced maternity and parental leave benefits.
• Access to internal learning and development programs to help you sharpen your skills.
• A variety of enterprise-wide employee discounts and support services for families.