Samin Yasir

Backend & Systems Engineer

Building resilient concurrent pipelines, adapter seams, and distributed event systems.

Featured Work

Oct 2026

Elixir Oban PostgreSQL Docker Telegram Bot API

Outcome: An adapter-driven publishing engine with review gates and verified exactly-once delivery guarantees.

Idempotency: PostgreSQL partial unique index suppressing duplicate dispatches under simulated network drops.
Fault Tolerance: Oban workers resuming mid-batch crashes with HTTP 429 snooze parsing.

→100% duplicate suppression under retry storms

→HTTP 429 Retry-After queue snoozing

Why generative code assistants struggle with OTP supervision hierarchies, process dictionary traps, and explicit boundary seams.

How partial unique indexing and transactional outboxes guarantee exactly-once message dispatch even during catastrophic worker crashes.

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