Freelance UI Designer

We’re a crew of thinkers, makers, tinkerers, and challengers. People who wake up wanting to make the internet less boring. Who care—really care—about the work. If you’re the kind of designer who wants to make smart things beautiful and beautiful things smart, we want to meet you.

At Critical Mass, we work with the world's most influential brands—the ones that power creativity, shape culture, and build what’s next. Your role? Help them connect with real humans through design that’s smart, striking, and anything but generic.

Contract duration: 2 months

You Will:

• Turn strategic ideas into stunning visuals that make people care—even about the stuff they didn’t know they needed.
• Design for digital-first ecosystems: websites, platforms, content hubs, product interfaces, campaigns, and brand systems.
• Create mood boards, interactive layouts, design systems, and micro-animations that bring ideas to life.
• Collaborate with a team of creatives, strategists, UX thinkers, and developers who are all in on making great work.
• Tweak. Polish. Push. Ship. Then do it again—even better.

You Have:

• 2+ years of digital design experience—agency or in-house, brand-side or startup—we care more about your taste than your title.
• A portfolio that balances clarity and charisma. We want to see smart thinking and killer craft.
• Mastery of Figma and Adobe Creative Suite. Bonus points for motion chops, prototyping skills, or any emerging tech/design tools you're exploring.
• A sharp eye for detail and a love for clean, intelligent, human-centered design.
• Communication skills to clearly articulate your thinking (and sometimes defend your weirdest idea).
• A curious, collaborative spirit. You’re not just here to “do”—you’re here to contribute.

Critical Mass is an equal opportunity employer. 

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