Web Systems
Green Card Application
A validation and consultancy platform for green card lottery applications: form checking against 50+ official rules, payments and an admin panel.
Most green card lottery applications are rejected not for their content but for their form: name spelling, photo dimensions, date format. People only found out once they had been rejected.
The validation engine
I distilled more than fifty rules from the US State Department requirements and built them into the form. Turkish character detection, Latin-only enforcement, age checks, photo format validation — all while typing, not after submitting.
Payments and administration
A multi-service cart on Stripe, discount codes, currency-aware pricing and webhook verification. The admin panel handles orders, services and discounts, with instant notifications over Telegram and email.
Security
Two-factor authentication, CSRF protection, rate limiting, security headers and encrypted payment data. The interface is fully bilingual, Turkish and English.