UPI integration — the spec quirks no one mentions
UPI is the most popular payment rail in India. The spec is precise. The implementation guides are not. Notes on the integration details that ate weeks the first time.
Archive
337 posts · Page 28 of 29. ← Blog
KYC under the RBI Master Direction vs Aadhaar offline...
Two KYC pathways an Indian fintech has to support. The Master Direction (Video KYC, etc.) and Aadhaar Offline KYC. Different speeds, different evidence requirements, different audit shapes.
Voice AI for two-wheelers — multi-language patterns from...
A rider asks the bike a question in Marathi, Hindi, or English. The voice stack has to do ASR, intent classification, dispatch to a service tool, generate a response, TTS — all under 3 seconds. Notes from the proof-of-concept.
Brownlow — Cloud KMS + Security Command Center for vote...
Vote integrity needed two things the platform team couldn't fake even by accident: signing keys we couldn't access, and continuous security monitoring we couldn't silence. KMS + SCC delivered both.
AIGP body of knowledge — a Go engineer's reading map
IAPP's AI Governance Professional certification covers a body of knowledge worth knowing whether you certify or not. The mapping from BOK to working Go code for the engineer who wants to understand AI governance practically.
The board policy is not a slide — it's a YAML file
The bank's board approves an AI policy. The policy exists as a slide deck nobody reads. The risk team's actual operational policy is what's in the code. Closing that gap is the FREE-AI Rec 14 win.
Audit logs are the API of record
The audit log isn't a side effect of the system. It's the contract you owe to regulators, customers, and your future self. Treat it as a first-class API — schema, versioning, and SLOs included.
Twelve Go idioms I changed my mind about
Patterns I confidently recommended five years ago that I'd argue against today. The list of "things you used to do in Go that don't pay back anymore."
iter.Seq — the pull iterator pattern in Go 1.23+
Range-over-function landed in Go 1.23. `iter.Seq` lets you write iterators that compose. The patterns that pay back; the ones that don't.
errgroup patterns for parallel agent dispatch
Fan out to N agents; first error cancels the rest; collect successful results. errgroup is the right tool for this; the patterns are concise but worth getting exactly right.
Twelve months of writing in public — what worked, what...
Reflections on a year of consistent technical writing. The post categories that compounded; the ones that didn't; what I'd tell someone starting out.
The recruiter test — what your repo says before the...
A recruiter spends 90 seconds on your GitHub before deciding to talk to you. What they're looking for; what makes them skip; what signals matter more than the README.