The Polymathic Engineer

The Polymathic Engineer

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March 2025

Back of the envelope
How to measure a system capacity or performance requirements and choose the best design.
 • 
Franco Fernando
Data Structures for Image Processing
Five data structures you should know to write great image processing algorithms.
 • 
Franco Fernando
1
The Definitive Guide to Load Balancers
All what you need to know to use load balancers in distributes systems.
 • 
Franco Fernando
The Shopify Checkout Architecture
How Shopify uses sandboxing to build secure checkout pages.
 • 
Franco Fernando
2

February 2025

The 12 Factor App: an updated guide
A review of the 12 Factor App methodology for building SaaS apps. Their original formulation, and how they have evolved.
 • 
Franco Fernando
How (not to) fail a coding interview
Common mistakes developers makes during coding interviews and how to avoid them.
 • 
Franco Fernando
5
The Ins and Outs of DNS: A Technical Guide
Everything a software developer should know about how the domain name system works.
 • 
Franco Fernando
Database sharding case study: PostgreSQL
Lessons learned from how the Notion's team sharded their monolithic Postgres.
 • 
Franco Fernando
4

January 2025

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