I'm Lucas Souza, but most people call me Los (like "loss") — an engineer with a huge focus on UX with over eight years of experience designing and developing scalable, high-quality applications. I'm Brazilian, based in Sorocaba, São Paulo, and I've spent most of my career working remotely with teams across the world.

I have a hybrid skill set that lets me bridge design and engineering. I can lead UI/UX work in Figma, build design systems from scratch, and ship pixel-perfect, high-performance frontends. My work has spanned startups and large enterprises — including Tim, Bradesco, and Vivo — products reaching millions of monthly active users.

I focus on building intuitive, maintainable, and scalable user experiences, and I care about the small details: motion that feels right, type that holds up at every scale, interfaces that quietly get out of the way.

Since August 2023 I've been Founding UX Engineer at Launchbrightly, where I own a 120+ component design system in Figma + Vue 3 + Storybook. Most of my week goes into the system: shipping new components, writing engineering specs in Figma, and keeping the Vue implementation pixel-perfect against the source of truth.

I'm test-driven by default — full coverage with Vitest, Vue Testing Library, and VTU sits at 85% across the app, which has measurably reduced regression. I also work directly with the CEO and CPO on product strategy and UX decisions, and design end-to-end high-fidelity prototypes.

Outside work I'm into gaming, travel, airsoft, taekwondo, shooting, and playing on my small home studio. I'm married, have two stepchildren, a baby, two dogs, and a snake. ADHD brain, INTJ-A personality, introvert by nature.

I moved from São Paulo's capital to Sorocaba in 2020 — a quieter city of ~700k people — for a better cost of living and quality of life. I've been working remotely with global teams ever since.