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The Software Engineering Podcast with Fexingo: Code, Architecture, and Engineering Best Practices

The Software Engineering Podcast with Fexingo: Code, Architecture, and Engineering Best Practices

By: Fexingo
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Lucas and Luna sit down at side-by-side laptops to talk about the craft of building software. Each episode picks a single engineering challenge — optimizing a database query for latency, designing a fault-tolerant microservice boundary, refactoring a legacy monolith without breaking production — and walks through the trade-offs with real code examples and benchmark numbers. They debate testing strategies (integration vs. end-to-end, when to mock), revisit classic papers on distributed systems and data structures, and trace how architectural decisions cascade into operational costs. The show serves senior developers, staff engineers, and technical leads who want to hear reasoned, specific conversations about trade-offs and rigor — not hype about the latest framework. Lucas brings the journalist's habit of asking why a team chose one pattern over another; Luna pushes back with real-world failure stories from her own career. Together, they treat software engineering as a discipline of explicit decisions and measurable outcomes. No hot takes, no 'best practices' without context. Just two engineers thinking out loud about how to build systems that last. What does it actually cost to ship a feature with 99.99% uptime — and when is that the wrong target? #SoftwareEngineering #SystemArchitecture #CodeQuality #DistributedSystems #DatabaseOptimization #Refactoring #TestingStrategy #Microservices #Monolith #PerformanceEngineering #CleanCode #TechDebt #EngineeringCulture #PairProgramming #FexingoBusiness #BusinessPodcast #Technology #EngineeringBestPractices Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • How a Single Bit Flip Brought Down an Entire Data Center

    How a Single Bit Flip Brought Down an Entire Data Center
    Jun 7 2026
    In episode 36 of The Software Engineering Podcast with Fexingo, Lucas and Luna dive into one of the most infamous hardware-induced software bugs in recent memory: the 2021 Facebook outage caused by a single bit flip. Lucas explains how a routine configuration change triggered a cascading failure that took down Facebook, Instagram, and WhatsApp for over six hours. He walks through the exact sequence — a BGP withdrawal, DNS failures, and a data center network meltdown — and why a single incorrect bit in a router's memory was the root cause. Luna challenges the conventional wisdom about redundancy and asks whether engineers can realistically guard against single-bit errors at scale. They discuss cosmic rays, memory error-correcting codes, and the trade-offs between software abstraction and hardware reality. Along the way, they share practical lessons for engineers designing resilient systems: from careful change management to the dangers of assuming hardware is perfect. #SoftwareEngineering #Technology #FacebookOutage #BitFlip #BGP #DNS #DataCenter #Resilience #Infrastructure #Networking #CosmicRays #ECC #ErrorCorrection #ChangeManagement #CascadingFailure #EngineeringLessons #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    6 mins
  • How One Engineer Slashed Build Times from 40 Minutes to 90 Seconds

    How One Engineer Slashed Build Times from 40 Minutes to 90 Seconds
    Jun 6 2026
    In this episode of The Software Engineering Podcast, Lucas and Luna dive into the story of a senior engineer at a mid-size SaaS company who cut their CI build pipeline from 40 minutes to 90 seconds. They walk through the specific bottlenecks: a monolithic Gradle build with unnecessary task dependencies, Docker layers being rebuilt on every commit, and a test suite that ran sequentially. The fix was a combination of incremental compilation, parallel test execution, and a custom caching layer using BuildKit. They also discuss the cultural resistance to changing a 'working' build system and how the engineer used data to win buy-in. By the end, listeners get a concrete playbook for auditing their own CI pipelines and a reminder that build speed is often the cheapest performance optimization you can make. #SoftwareEngineering #BuildOptimization #CI #Gradle #Docker #BuildKit #IncrementalCompilation #ParallelTesting #DevEx #DeveloperProductivity #CacheStrategy #BuildPipeline #Tech #EngineeringBestPractices #FexingoBusiness #BusinessPodcast #TheSoftwareEngineeringPodcast #Fexingo Keep every episode free: buymeacoffee.com/fexingo
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    8 mins
  • How One Engineer Cut Docker Image Size by 90 Percent

    How One Engineer Cut Docker Image Size by 90 Percent
    Jun 6 2026
    Episode 34 of The Software Engineering Podcast with Fexingo dives into a practical optimization story: how one engineer at a mid-sized SaaS company shrank a bloated Docker image from 2.1 GB to just 210 MB. Lucas and Luna walk through the specific techniques used — from switching to Alpine base images to eliminating layer bloat with multi-stage builds and removing unnecessary packages. They discuss why smaller images matter beyond disk space: faster CI pipelines, reduced network transfer, and improved security posture. The episode also touches on the engineer's debugging process, including how they used 'docker history' and 'dive' to find hidden culprits like cached pip packages and leftover build artifacts. Listeners will walk away with a concrete checklist they can apply to their own Dockerfiles today. #Docker #ContainerOptimization #AlpineLinux #MultiStageBuild #DevOps #CI #SaaS #SoftwareEngineering #Technology #FexingoBusiness #BusinessPodcast #EngineeringBestPractices #Dockerfile #LayerCaching #ImageSize #Performance #Security #Tooling Keep every episode free: buymeacoffee.com/fexingo
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    8 mins
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