Saifullah AhadHow I built it
Six apps, from problem to proof
The plan I wrote, what the testing caught, and how each app reached Google Play. Every fact comes from the app's own build record.
The first check said "ready" — the sound engine had never run. Making it run found three bugs, then a controlled tone test proved the fix.
The phone being sold tests itself and hands the buyer a signed result — proven on a real phone, with zero crashes.
Friends and family cancel debts that go in a circle — only when everyone in the loop agrees. Proven with a real two-person test.
Tells you exactly where and when to look for the new crescent, from real astronomy — and says when a sighting was impossible.
Orders a village's one harvester by which field is losing grain fastest — and every phone can check the order is fair.
Shows where a link really goes before you open it. Testing caught two real bugs, fixed with tests that failed first.
Open to work
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Based in Dhaka, Bangladesh (UTC+6) · works any time zone · can start now · ready to relocate with visa sponsorship.