Episode

Build vs Buy: The Hidden Costs of “Just Building It” with Ahmed Bebars

Podcast: Screaming in the Cloud
Published: Apr 2, 2026
Duration seconds: 2575
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Summary

Engineering decisions shouldn't be based on what is possible to build, but on what is sustainable to maintain. Ahmed Bebars and Corey Quinn explore the long-term operational costs of custom infrastructure versus managed services.

Topics

Cloud Infrastructure
Kubernetes
AWS ECS
AWS EKS
Software Maintenance
Build vs Buy
Network Engineering
Site Reliability Engineering

Highlights

Main idea: The true cost of custom engineering is found in 'Day 50' maintenance, not the initial build
Practical takeaway: Choose managed services like ECS over EKS when your scale doesn't yet justify the operational overhead of Kubernetes
Failure mode: Building custom solutions that create 'tangled' environments where local testing no longer mirrors production
Business lesson: Prioritize focus on your core business by avoiding the trap of reinventing infrastructure components
Technical warning: Avoid tight subnet constraints and IP exhaustion by designing for expansion or adopting IPv6

Chapters

1:00 The Journey to Community Contribution: Ahmed discusses overcoming imposter syndrome and the value of sharing technical knowledge through open source and community work.
10:35 EKS vs ECS: Choosing the Right Scale: A discussion on why the New York Times uses ECS for their current scale and the importance of situational technology decisions.
20:10 Home Lab Reality Check: Comparing the stability and maintenance of personal K3s clusters to enterprise cloud environments.
23:15 The Long Game of Build vs Buy: Analyzing the hidden costs of maintenance, personnel turnover, and the financial impact of extended support in AWS.
29:50 The Complexity of Serverless Governance: The challenges of managing and governing large-scale architectures consisting of thousands of individual functions.
39:30 Networking, Subnets, and IPv6: The pitfalls of manual network configuration and the ongoing debate surrounding IPv6 adoption.