Guilherme Fonseca🇳🇱

About Guilherme Fonseca

Head of Product at Deloitte

I didn’t start my career in product. I kind of grew into it. I began as a very hands-on, technical person: data, engineering, building internal tools, automating things that annoyed people (including myself). Over time, I realized I wasn’t just interested in how things were built, but why and who we were building for, what problem really mattered, and how small decisions could scale to big impact. That curiosity pulled me into product. I’ve since worked across startups, big banks, and global platforms, from launching a digital advisor for farmers in Brazil, to leading global payments and fintech products across 16 markets in Europe. Along the way, I’ve scaled teams, survived mergers, navigated regulation, and learned (the hard way) how to balance business, tech, and humans. The common thread in my story is people. I genuinely enjoy helping product managers grow confidence, think clearly, and make better decisions , especially when things feel messy, political, or overwhelming. I’ve made plenty of mistakes myself, and mentoring is my way of paying those lessons forward. If you’re figuring out your next step in product, scaling your impact, or just want to sanity-check a tough situation, I’m happy to help.

Expertise

Sessions with Guilherme Fonseca

• Mentorship Session (30 min): Mentorship session

What mentees say

“I had an outstanding experience with my mentor, who provided exceptional guidance in preparing for my interview. His amazing communication and deep subject knowledge helped me identify my weak areas and develop effective strategies for improvement. I highly recommend booking a session with him.”

“Gui is an outstanding mentor who truly exceeded my expectations. His amazing communication skills and deep subject knowledge made our session incredibly productive. He thoroughly prepared by reviewing my portfolio and LinkedIn profile, providing invaluable insights that motivated me to improve! I'll definatly book his next session!”