I'm Matheus Sá.
A designer building things that last.
My name is Matheus Sá, a designer driven by the desire to build things that last — not just screens, but the systems, processes, and teams behind them.
I started in advertising. Studied at ESPM in São Paulo, learned to craft messages and shape perception. But I kept gravitating toward the product itself — how it worked, why it confused people, what it would take to make it feel obvious. That pulled me into UX, and I never looked back.
Over the past 6+ years I've worked across B2B SaaS, HR tech, enterprise AI software, and live marketing. At Valere, a US-based AI software company, I designed for enterprise clients and built the team's first career framework from scratch. Today I'm UX/Product Design Lead at CodingIT — owning end-to-end discovery, design execution and engineering handoff across events, compliance tech, and B2B platforms, with AI-augmented workflows (Claude, Claude Code, Lovable) that compress the path from ambiguous brief to shipped UI.
What energizes me most is the intersection of craft and structure. I'm the kind of designer who will obsess over a flow until it's right, and then document the decision so the next person doesn't have to start from zero. I tend to increase team output not by pushing harder, but by removing the friction that shouldn't exist in the first place.
Beautiful and broken is just broken.
I thrive in environments that genuinely invest in team culture and integration — places where people actually know each other and that trust translates into faster, better decisions. I also do my best work in fast-paced teams that move quickly but never blindly: decisions grounded in tests, validations, and real user signals. And when the context calls for it, async works great — as long as communication stays sharp and objective.
I believe that valuing design is no longer optional for companies that want to stand out. Especially now: good taste is becoming a commodity. AI makes polished-looking interfaces accessible to anyone. What still separates the great products from the forgettable ones is structured UX thinking — understanding how people actually think, where they get lost, what makes them trust a product enough to come back.