// writing
Writing
Long-form technical writing on architecture, distributed systems, and biometric platforms.
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How FIVUCSAS is built: a multi-tenant biometric authentication platform
May 5, 2026A technical note on the architecture of FIVUCSAS, covering multi-tenant RLS, the supported auth methods, refresh-token rotation, active liveness, and the team that built it.
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Letter counts and Abjad totals: verifying a Quranic engine letter-by-letter
May 5, 2026Mizan is a Quranic text-analysis and hybrid-search engine where every count is verified against the Tanzil corpus at load time and every result reports the counting method and model used.
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Kotlin Multiplatform in practice: building Muhabbet across Android, iOS, and backend
May 5, 2026Muhabbet is a privacy-first Kotlin messenger for Turkey. Compose Multiplatform on mobile, Spring Boot on the backend, a shared kotlinx.serialization wire protocol in the middle. Notes from building it solo.
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Replacing a 24-sheet macro Excel: how I built Sarnıç
May 5, 2026A Turkish exam-prep school was running 143 students, 20 teachers, and 24,444 schedule entries on a 24-sheet macro-enabled Excel workbook. This is how I replaced it with a multi-tenant web app with a constraint solver.
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Hexagonal architecture in production: Share Agent, BIST, and 12 indicators
May 5, 2026Share Agent is a stock analysis and automated trading platform for BIST Katılım Endeksi (XKTUM). Python 3.12, FastAPI, hexagonal ports-and-adapters, TimescaleDB, and three paper-trading agents. Notes from building it solo.