Case Studies

Long-form technical deep dives, organised into three pillars: AWS service internals, software, and system design.

AWS29 June 20268 min read

ECS vs EC2 is the wrong question

A study note on why ECS is not an alternative to EC2, what I think the practice questions are really asking, and what I would pick once I understood the layers.

AWS EC2 ECS Fargate Containers

Software29 June 20269 min read

Why HashMaps in Java are so cool

A study tour of HashMap internals, the small engineering decisions that keep it fast in the bad cases, and the contract on the user side that quietly breaks it.

Java Data Structures JVM Hashing