Sadman Rahamat Bishal

Database administrator · data systems · Dhaka

I work on database reliability and data infrastructure — mostly Oracle and Postgres in production, with occasional detours into pipelines and VoIP systems.

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Writing

VoIP Measuring Call Quality: MOS Scores in Practice Jun 24, 2026 Data Small Lessons from a Data Pipeline Rebuild Jun 10, 2026 Postgres Notes on Logical Replication in Postgres May 28, 2026 Oracle Partition Pruning in Oracle: Field Notes May 12, 2026

Projects

Data Flow Data Python / Airflow

A pipeline orchestration layer for scheduling and monitoring recurring data jobs.

AltDonate Postgres Postgres / Next.js

A donation platform backed by a Postgres ledger with reconciliation tooling.