A frontend developer with a strong background in design and focus on interaction, usability, and performance.
I enjoy transforming complex requirements into clear interfaces. I also care about how software is made, contributing to documentation, team standards, automation, mentoring, and developer experience.
• Help teams build better, faster, and with less friction
• Think creatively to support collaboration beyond code
• Stay curious and share what I learn
Interaction Design
My early multimedia background defined how I approach interface design, focusing on usability and efficiency, and often contributing to motion and other visual work like iconography and infographics.
Frontend Development
From Flash to modern SPAs, I’ve spent most of my career working on interfaces. These days, my main stack revolves around VueJS and React, while collaborating on design systems and prototypes.
Backend Development
While frontend is my focus, I’m fully capable on the backend when needed. I’ve worked with PHP, Java, Node and more recently serverless platforms like GCP Functions or AWS Lambda.
Currently working as a Lead Developer at Dentsu World Services, helping build tools and global platforms using React. Focused on improving developer experience and exploring AI-driven solutions in automation and knowledge workflows.
Frontend development for several user-facing products across web and mobile platforms. Worked with React and VueJS, collaborating closely with design and backend teams.
Worked on the conception and development of the UOL Ads platform, the company’s self-service advertising tool. Led the technical direction for the frontend, including the choice to adopt VueJS as the main framework.
Studied Information Systems at the EACH-USP. Didn’t complete the degree but gained a solid tech base through hands-on work.
Did a lot of Flash work — from banners and microsites to corporate websites and games — at a bunch of digital agencies, back when Flash ruled the web. Even went to Adobe MAX 2007 in Barcelona.
Early experience building websites, Flash banners, email campaigns, and early graphic design production.
Started a degree in Advertising at ECA-USP. Although I didn’t graduate, it was key to shaping my understanding of communication and media.
Published my first personal website under the name Isotopic. It connected me to an early community of designers and developers building for fun and experimentation.
guilhermecruz@gmail.com
br.linkedin.com/in/isotopic
github.com/isotopic