The Technical Co-Founder Podcast with Fexingo: Engineering Founders, CTOs, and Building from Code cover art

The Technical Co-Founder Podcast with Fexingo: Engineering Founders, CTOs, and Building from Code

The Technical Co-Founder Podcast with Fexingo: Engineering Founders, CTOs, and Building from Code

By: Fexingo
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Lucas and Luna sit down with engineering founders and CTOs who ship code, not slide decks. Each episode deconstructs how a technical leader chose their stack, scaled the engineering team, and balanced building against fundraising — from the first commit to the series A. Lucas presses for concrete metrics: deployment frequency, incident response times, burn rate per engineer. Luna challenges the guest on hiring philosophy, monorepo decisions, and when to rewrite vs. refactor. The show serves experienced software engineers considering a co-founder role, early-stage CTOs looking for war stories, and product-minded developers who want to understand the business side of code. No fluff, no motivational speeches — just the real trade-offs between shipping fast and building robust systems, told by the people who made the calls. You'll walk away with a mental model for choosing your first cloud provider, structuring a two-pizza team, or deciding whether to take outside funding at all. #TechnicalCoFounder #CTO #EngineeringLeadership #StartupEngineering #TechStack #SoftwareArchitecture #FounderAdvice #CodeReview #Scalability #DevOps #StartupCulture #EngineeringManagement #VentureCapital #StartupFunding #BusinessPodcast #FexingoBusiness #Business #Technology Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • How One Startup Uses Event Sourcing to Rebuild Features

    How One Startup Uses Event Sourcing to Rebuild Features
    Jun 15 2026
    Episode 52 of The Technical Co-Founder Podcast dives into event sourcing—a data architecture that treats every state change as an immutable event. Lucas and Luna explore how a real startup, order-management platform Riverbend, adopted event sourcing not for auditing but to rebuild a critical feature without a database migration. They walk through the concrete trade-offs: the append-only log that doubles as a source of truth, the replay mechanism that let them add a 'subscription pausing' feature in two weeks instead of two months, and the operational cost of event versioning when schema evolves. Lucas cites Martin Kleppmann's 'Designing Data-Intensive Applications' and contrasts event sourcing with CRUD-based approaches. The conversation also touches on CQRS (Command Query Responsibility Segregation) as a natural companion pattern, and why Riverbend chose not to use an event store like EventStoreDB but built on PostgreSQL. Listeners learn when event sourcing pays off—and when it's overkill. #EventSourcing #CQRS #SoftwareArchitecture #PostgreSQL #DataPatterns #StartupEngineering #Riverbend #MartinKleppmann #FeatureRebuild #ImmutableLog #TechDebt #EngineeringTradeoffs #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #TheTechnicalCoFounderPodcast #EngineeringLeadership #DataIntensiveApps Keep every episode free: buymeacoffee.com/fexingo
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    8 mins
  • How One Startup Uses TypeScript to Prevent Bugs at Scale

    How One Startup Uses TypeScript to Prevent Bugs at Scale
    Jun 14 2026
    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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    10 mins
  • How One Startup Uses Dependency Graphs to Prevent Outages

    How One Startup Uses Dependency Graphs to Prevent Outages
    Jun 14 2026
    Episode 50 of The Technical Co-Founder Podcast. Lucas and Luna explore how a growing fintech startup reduced production incidents by 40 percent by modeling their entire microservice architecture as a dependency graph. They walk through the specific tooling — an open-source graph database called DGraph — and the cultural shift of making every team own their upstream and downstream services. They discuss how the graph caught a critical cascade failure during a routine database migration, how the company visualizes blast radius before every deploy, and why the CTO compares it to a city's subway map. If you're an engineering leader wrestling with microservice complexity, this episode gives you one concrete pattern to try next week. #DependencyGraph #Microservices #OutagePrevention #GraphDatabase #DGraph #BlastRadius #SiteReliability #EngineeringCulture #TechDebt #IncidentResponse #SoftwareArchitecture #CTO #Fintech #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #TechnicalCoFounder #EngineeringLeadership Keep every episode free: buymeacoffee.com/fexingo
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    9 mins
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