Kostin — Boarding House Management
Boarding house payment and billing system: room & tenant data, monthly invoices, proof-of-transfer verification. PWA.
$ whoami
Who Am I
Full Stack Web Developer · Ethical Hacker
Building end-to-end web applications and performing ethical security testing. Documenting projects, skills, and the learning journey in IT.
01 — About

I am a Full Stack Web Developer and Ethical Hacker. I build web applications end-to-end — from frontend to backend — and perform ethical security testing to find and fix vulnerabilities.
02 — Skills
03 — Projects
Boarding house payment and billing system: room & tenant data, monthly invoices, proof-of-transfer verification. PWA.
Personal finance and financial planning app. Track income/expenses, manage budgets.
Personal link-in-bio page with dark glassmorphism. Unifies Instagram, WhatsApp, and Discord in one link, responsive, deployed on Netlify.
06 — Curriculum Vitae
CV summary in PDF format. View or download directly.
View / Download CV (PDF)