Mario Martins

At Just Eat Takeaway, I have worked across After Order Experience, Checkout, and Fintech, contributing to customer journeys including courier tracking, checkout, and payments. My work extends beyond Android development and frequently involves investigating complex cross-platform challenges spanning Android, iOS, Web, Backend, experimentation platforms, and fulfillment systems. I collaborate with engineers and stakeholders across multiple domains to investigate complex problems, evaluate trade-offs, document findings, and propose scalable solutions adopted across platforms. In After Order Experience, I was responsible for the Android map experience used for real-time courier tracking, work that later became the basis for my Droidcon Berlin 2023 talk, How to Build a Clean SSE Client Flow. I have also contributed to architecture, scalability, and cost-optimization initiatives involving routing, mapping, and customer-facing experiences, helping improve platform efficiency while maintaining a consistent user experience across markets.

PicPay is one of the largest online banking apps in Brazil, with over 60 million accounts and 12 years of operation. As a Staff Engineer in the Store business unit, I focused on the squads responsible for Checkout, Digital Goods, and prepaid phone recharge, driving technical improvements and enhancing the payment experience.

iFood is the largest food delivery platform in Latin America, offering complex and exciting technical challenges. During my time there, I worked across all Loyalty sub-teams—Loop, Club, Rewards, and Subscriptions—helping shape key features. I also took on mentorship responsibilities and served as the Tech Lead for the Android skill within my teams, driving technical excellence and team growth.