Sid Patil

Senior Android Engineer at Delivery Hero

Sid Patil is a Senior Android Engineer and Kotlin Advocate based in Berlin, Germany. He currently works at Delivery Hero, building apps for 13 food delivery brands in 50 countries. Previously he helped build Paytm, one of India's largest mobile payment platforms. He is also involved in organizing and hosting community events at Android Worldwide and Kotlin Mumbai. Find talks, articles, community activities and connect with him through his site, siddroid.com.

The Art of Re-architecture: Lessons from the Trenches at Foodpanda & Delivery Hero

Every engineer eventually inherits a legacy codebase — a complex beast that slows down innovation and frustrates teams. But how do you start taming it? What truly constitutes "legacy," and where do you strike first for maximum impact? This talk shares hard-learnt lessons from the front lines of building and re-architecting some of the world's most complex food delivery apps at Foodpanda, Foodora, and Delivery Hero. We will move beyond theory to offer a practical playbook for transforming large-scale Android applications while navigating the intricate dance of technical vision and business demands. This session will cover five key lessons: Defining Legacy: A framework for identifying legacy code, locating architectural hotspots, and strategically choosing your first refactoring target. The Conundrum of Refactor vs. Rearchitect: Understanding the critical difference, when each approach is relevant, and what they truly entail for your team and timeline. The Marriage of Product & Engineering: Mastering the balancing act of delivering new features while simultaneously executing a large-scale re-architecture without losing momentum. Convincing Stakeholders: How to effectively communicate a compelling technical vision, get buy-in from product and business leaders, and become a trusted team player. Choosing Your Weapons: A pragmatic guide to selecting the right architectural patterns, tools, and modularization strategies for the job at hand. Join this session and tackle your most daunting legacy challenges in your code-bases, leaving with a playbook that has been tested and proven at scale.