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The CTO Podcast with Fexingo: Technical Leadership, Architecture, and Engineering Org

The CTO Podcast with Fexingo: Technical Leadership, Architecture, and Engineering Org

By: Fexingo
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Lucas and Luna sit down in front of a whiteboard to dissect the decisions that shape technical organizations. Each episode of The CTO Podcast with Fexingo examines a specific engineering leadership challenge — from scaling a microservices architecture without creating a distributed monolith, to managing the cognitive load of a 200-engineer org, to choosing between a monorepo and polyrepo strategy based on team topology. The conversations are grounded in real-world cases: how Etsy restructured its data pipeline after a 2019 outage, why Stripe’s API versioning policy reduces breaking changes, or what Basecamp’s choice of SQLite over PostgreSQL says about product philosophy. Lucas brings the journalistic rigor — citing commit histories, RFCs, and postmortems — while Luna pushes back with the pragmatics of org dynamics, hiring constraints, and technical debt. There are no hot takes, no vendor pitches, no ‘best practices’ without trade-offs. Each episode ends with a specific tension left unresolved: the optimal number of direct reports for a VP of Engineering, the point at which a monolith should be broken apart, or whether a platform team should own the CI/CD pipeline. The listener is a senior engineer, a staff+ IC, or a new CTO who wants to learn from the decisions others have made — without the hype. After an episode, you’ll have a framework, not a checklist, and a clear sense of the questions you should be asking your own team. #CTOPodcast #TechnicalLeadership #EngineeringOrg #SoftwareArchitecture #SystemDesign #EngineeringManagement #Microservices #Monorepo #PlatformEngineering #Scalability #TechDebt #DevOps #Infrastructure #SiteReliability #DistributedSystems #Business #FexingoBusiness #Technology Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • How Figma Scales Real-Time Collaboration With CRDTs

    How Figma Scales Real-Time Collaboration With CRDTs
    Jun 7 2026
    Episode 36 of The CTO Podcast dives into how Figma built its real-time collaboration engine using Conflict-Free Replicated Data Types (CRDTs). Lucas and Luna unpack the architectural decision to move from Operational Transform to CRDTs, how Figma handles merge conflicts at scale, and the engineering tradeoffs behind its vector-based multi-user editing. They walk through the key design choices: why Figma chose a custom CRDT instead of off-the-shelf libraries, how it serialises operations for low-latency sync across hundreds of collaborators on a single file, and the surprising way it prioritises local responsiveness over consistency. Luna asks the hard questions about production incidents, and Lucas breaks down the monitoring approach behind Figma's 'real-time' guarantee. A concrete look at distributed systems theory meeting product design. #Figma #CRDT #RealTimeCollaboration #DistributedSystems #ConflictFreeReplicatedDataTypes #OperationalTransform #ProductDesign #Collaboration #Latency #Engineering #Architecture #Whiteboard #MultiUserEditing #Sync #VectorGraphics #BusinessAndTechnology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • How Elasticsearch Powers Netflix's Search and Observe

    How Elasticsearch Powers Netflix's Search and Observe
    Jun 6 2026
    Netflix runs one of the largest Elasticsearch deployments in the world — over 150 clusters, thousands of nodes, processing tens of billions of documents. In this episode, Lucas and Luna unpack how Netflix uses Elasticsearch not just for log aggregation, but to power its internal search, real-time monitoring, and even the titles you see when you open the app. They walk through the architecture behind Netflix's search — from how they handle partial matches across 17,000 titles to how they keep observability data flowing without crashing the clusters. Along the way, they cover shard sizing, index lifecycle management, and the painful lessons Netflix learned when Elasticsearch failed at scale. A practical episode for any engineering leader running search or observability at scale. #Elasticsearch #Netflix #SearchArchitecture #Observability #Logging #DistributedSystems #Sharding #IndexLifecycleManagement #RealTimeMonitoring #EngineeringLeadership #CTO #TechnicalDebt #Infrastructure #SiteReliabilityEngineering #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #TheCTOPodcast Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • How Discord Rebuilt Its Voice Engine for Latency

    How Discord Rebuilt Its Voice Engine for Latency
    Jun 6 2026
    In this episode of The CTO Podcast, Lucas and Luna dive into Discord's architectural overhaul of its real-time voice system. They explore how the team reduced latency from hundreds of milliseconds to under 50 by switching from a traditional client-server model to a mesh-based WebRTC architecture. The discussion covers the trade-offs of running their own media servers versus outsourcing, the engineering challenge of synchronizing 50 users in a single voice channel without a central coordinator, and how Discord handled the transition without disrupting its 150 million monthly active users. Lucas explains the key insight: rather than optimizing the existing pipeline, Discord rethought the entire signaling and media routing layer around a 'selective forwarding unit' pattern. Luna presses on the operational cost of running proprietary infrastructure at scale, and Lucas shares the surprising finding that the rewrite actually reduced server spend by 30 percent. The episode closes with a reflection on when to rebuild versus patch. #Discord #VoiceEngine #WebRTC #LowLatency #RealTimeCommunication #MeshArchitecture #SelectiveForwardingUnit #CTO #EngineeringOrg #Scaling #Infrastructure #TechnicalLeadership #Business #Technology #FexingoBusiness #BusinessPodcast #TheCTOPodcast #Architecture Keep every episode free: buymeacoffee.com/fexingo
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    8 mins
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