Pacifica Labs Blog
Notes from building, modernising and running production software — across SaaS, integrations, ecommerce operations, data systems and practical AI.
Written by Tarun Mookhey, CTO / Principal Engineer at Pacifica Labs.
Featured · Engineering
A rewrite replaces the risky parts and the valuable parts at the same time. Staged modernisation lets you separate them.
A practical framework for deciding between a staged Rails upgrade and a rewrite, drawing on a Rails 2/Merb to Rails 7.1 modernisation.
Read articleSystems & Integrations
The happy path is not the integration. The integration is what happens when the other system is slow, down or wrong.
AI
Use AI for ambiguity and language. Use ordinary code for anything that must be exact.
Operations
The hard problem in operational ecommerce begins after payment.
Earlier technical notes and references from hands-on development work.