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The Developer Tools Podcast with Fexingo: APIs, Infrastructure, and Software for Engineers

The Developer Tools Podcast with Fexingo: APIs, Infrastructure, and Software for Engineers

By: Fexingo
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Lucas and Luna examine the developer tools landscape — APIs, infrastructure, and software designed for engineers — through the lens of business viability and technical merit. Each episode picks a specific tool or platform: how it was built, what problem it solves, who pays for it, and whether its architecture gives it a durable advantage. They compare pricing models, study public SDKs and changelogs, and trace the decisions that turn an open-source side project into a billion-dollar company. No demos, no tutorials — just two co-hosts reading documentation, running benchmarks, and asking whether a tool's design actually makes engineers more productive or just more dependent. Past topics: the economics of API gateways, why gRPC is replacing REST in microservices, the rise of WebAssembly beyond the browser, and the hidden costs of managed Kubernetes. Listeners walk away with a concrete framework for evaluating developer tools — not as a user, but as a buyer, builder, or investor. What does it take for infrastructure software to earn the trust of engineers who have seen too many promises break in production? #DeveloperTools #APIs #Infrastructure #SoftwareEngineering #CloudComputing #OpenSourceBusiness #GRPC #WebAssembly #Kubernetes #SDKs #DevOps #PlatformEngineering #Technology #FexingoBusiness #BusinessPodcast #Business #EngineeringPodcast #TechBusiness Keep every episode free: buymeacoffee.com/fexingo© 2026 Fexingo. All rights reserved. Economics
Episodes
  • How API Design Choices Create Hidden Technical Debt

    How API Design Choices Create Hidden Technical Debt
    Jul 4 2026
    Lucas and Luna explore how seemingly minor API design decisions — like choosing between REST and GraphQL, deciding on pagination strategies, or selecting a serialization format — can compound into significant technical debt over time. They examine a real-world case: a mid-stage SaaS company that had to rewrite its entire integration layer after three years because its early API design favored flexibility over consistency. Along the way, they discuss the concept of 'API gravity' and why the cost of change increases exponentially the longer an API is in production. Listeners learn practical heuristics for evaluating trade-offs between developer experience and long-term maintainability. #API #TechnicalDebt #REST #GraphQL #Pagination #Serialization #DeveloperExperience #APIGravity #DesignTradeoffs #SoftwareEngineering #BackendDevelopment #Integration #TechDebt #SystemDesign #BusinessAndTechnology #DeveloperTools #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    10 mins
  • Why Your API Needs a Service-Level Objective for Documentation Quality

    Why Your API Needs a Service-Level Objective for Documentation Quality
    Jul 3 2026
    Lucas and Luna dive into the hidden cost of bad API docs: the 'documentation to support ticket' ratio. They walk through how a major payment processor found that every percentage point of missing doc coverage generated $400K in extra support costs per quarter. Lucas explains why treating docs like code — with version control, automated testing, and a documentation SLO — is the only way to scale an API program. They discuss real-world examples: Stripe's doc-driven onboarding funnel and Twilio's 'docs as product' philosophy. Luna pushes back on the cost of maintaining docs at that level, and Lucas breaks down the math: a documentation SLO isn't a nice-to-have, it's a cost center that pays for itself. By the end, you'll have a framework for measuring doc quality, tying it to business outcomes, and convincing your VP Eng that docs deserve a line item. #API #Documentation #DeveloperExperience #SLO #TechDebt #Stripe #Twilio #SupportCosts #DevTools #EngineeringManagement #DocumentationAsCode #APIProductivity #Business #Technology #FexingoBusiness #BusinessPodcast #DeveloperToolsPodcast #DocsSLO Keep every episode free: buymeacoffee.com/fexingo
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    6 mins
  • Why API Webhook Payloads Should Be Signed Not Verified

    Why API Webhook Payloads Should Be Signed Not Verified
    Jul 3 2026
    Episode 88 of The Developer Tools Podcast with Fexingo dives into a common blind spot in webhook security: signature validation. Lucas and Luna dissect how most developers treat webhook verification as a checkbox rather than a chain of trust, using the 2024 Twilio breach as a concrete example. They walk through why HMAC-based signatures alone aren't enough, how replay attacks exploit timestamp gaps, and why envelope encryption keys should rotate per webhook endpoint. The hosts also compare approaches from Stripe, GitHub, and Slack, showing where each falls short. By the end, you'll understand why webhook payloads should carry a signed digest of the event data, not just a verification token. Perfect for engineers building integrations or maintaining event-driven systems. #WebhookSecurity #APIDesign #DevTools #Infrastructure #SoftwareEngineering #Cryptography #HMAC #EventDriven #TwilioBreach #StripeAPI #GitHubAPI #SlackAPI #ReplayAttack #PayloadSigning #EndpointSecurity #BusinessAndTechnology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo
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    16 mins
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