Junior Software Engineer
Off-grid peer-to-peer messaging prototype with BLE discovery, secure sessions, encrypted archives, offline queues, and custom relay/routing design.
Single-location inventory ledger and work-order fulfilment demo with CQRS, retry-safe stock posting, PostgreSQL xmin concurrency, migrations, and tested backup/restore recovery.
Auditable incident-SLA transition service with PostgreSQL-backed idempotency, migration rehearsal, competing-worker tests, and an at-least-once outbox.
Admission-control service with atomic memory and standalone-Redis decisions, all-or-nothing bulk permits, bounded Prometheus metrics, and fail-closed dependency handling.
Offline-first prayer-time and mosque Jamaat scheduler with local persistence, timing-rule resolution, backup/import, Qibla tools, widgets, and tests.