Explore strategies for designing scalable APIs to handle 150 million orders annually in this GOTO Berlin 2019 conference talk. Learn how Takeaway.com tackles challenges of evolving business requirements, new technologies, and global development teams. Discover principles like Domain Driven Design and Microservices for building robust logistics APIs. Examine the migration process for modernizing a 20-year-old front-end codebase, implementing best practices such as Backend for Frontend and Server Side Rendering. Gain insights into communication in microservices architecture, API design practices, authentication, authorization, error handling, versioning, documentation, and testing. Address challenges of tightly coupled logic, legacy systems, and implementing design systems for scalable front-end development.