How One Startup Uses TypeScript to Prevent Bugs at Scale

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How One Startup Uses TypeScript to Prevent Bugs at Scale

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In this episode of The Technical Co-Founder Podcast, Lucas and Luna dive into how one startup—a fintech processing millions of transactions—uses TypeScript's type system to catch bugs before they ever reach production. They explore the specific types and patterns that prevent entire categories of runtime errors, from discriminated unions to branded types. The hosts walk through a real example: how a single 'type' declaration eliminated a class of off-by-one errors in their payment reconciliation system. They also discuss the trade-offs of strict typing, including slower compile times and the learning curve for new hires. If you're a founder or CTO deciding how strict your TypeScript config should be, this episode offers a concrete case study of what's possible when you lean into the type system. No hype, just a practical look at one team's approach to shipping fewer bugs. #TypeScript #TypeSafety #Fintech #BugPrevention #StrictTyping #DiscriminatedUnions #BrandedTypes #EngineeringCulture #StartupEngineering #CodeQuality #TypeSystem #TechnicalDebt #DeveloperExperience #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #TheTechnicalCoFounderPodcast #EngineeringFounders Keep every episode free: buymeacoffee.com/fexingo

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