Backend engineer, mostly Postgres and Python. I write the course I wish someone had handed me my first year out of college. Austin, TX.
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Priyanka asked me to write this one. SPF, DKIM, DMARC, and why your beautifully-written cold email is landing in promotions tabs regardless.
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A 500-million-row backfill is not "a big UPDATE". It's a job that has to run for days, pause gracefully, and resume from where it stopped.
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Writing to both shapes during the transition window is how you keep reads consistent without a lock. The failure modes to watch for.
A new step in the playbook “Launching a B2B SaaS in 90 Days”
Rachel asked me to write this step because too many founders spend two weeks designing a schema they'll throw out anyway. Here's what to do instead.
A new lesson in the course “Database Migrations Without Downtime”
Expand the schema additively. Deploy code that tolerates both shapes. Backfill. Flip the reads. Contract the schema. Four phases, clear rules.
A new lesson in the course “Database Migrations Without Downtime”
Most production databases outlive three generations of application code. Before you invest in zero-downtime machinery, ask whether you actually need it.
