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A talk given by Yinka Omole from Personio at the 2025 Platform Summit in Stockholm, Sweden. Modern API design isn’t just about choosing what technology to use. It’s about building systems that must satisfy regulatory compliance AND high performance, international scaling AND appropriate security, legacy integration AND modern architecture, all simultaneously. Drawing from experience building APIs at Goldman Sachs (financial regulations) and Personio (international HR), I’ll share practical patterns for API architecture when you can’t just optimize for one dimension. You’ll learn: – How to identify and prioritise conflicting requirements – Data modelling approaches when privacy laws conflict with other requirements – Real examples from Payroll APIs serving multiple jurisdictions, and combining lots of input data Key takeaway: A framework for constraint-driven API design that turns requirements headaches into architectural advantages. Call for speakers for Platform Summit 2026 open - apply now: https://nordicapis.com/call-speakers/ Check the Nordic APIs website and blog: https://nordicapis.com/