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Technical notes. What I've learned by building.
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Engineering5 min read
Splitting central from regional without duplicating everything.
Multi-region isn't 'one stack, copy-pasted N times.' Three layers, each with a clear job, and a single rule about who depends on whom.
Engineering4 min read
Build vs buy on AWS: when self-hosted compute beats managed.
Managed services bill per output. Self-hosted compute has a fixed base. The economics cross, and it pays to know where the crossover is before you commit.
Engineering3 min read
Tunneling to a private RDS without a bastion.
Reach a private RDS instance from your laptop without a bastion EC2. SSM Session Manager port forwarding does it in one command.
Engineering6 min read
SQS between services, not just for long jobs.
Synchronous calls are the default reflex. Half of them shouldn't be. A queue between producer and consumer changes the failure shape of your whole system.