I built Hasnahena, an independent finance platform for a community cooperative in Jashore, where real members have used it since August 2026. As its sole software engineer, I developed a Go API with 60+ endpoints and designed balance changes to run transactionally with row locks and an append-only audit log.
At Hasnahena, I added security controls including role-based access, server-side JWT revocation, and rate limiting. I wrote 269 Go tests and built a load test that handled about 180 postings per second while reconciling exactly.
At JB Connect Ltd (JBC), I worked on a team AI content-generation app, setting up backend layers and building a generation endpoint with FastAPI. Outside production software, I compete in programming and CTFs, teach programming and web security, and serve as President of the MIST Computer Club.
