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Why do you think you are a good fit for this backend role?

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I've already built the part of this job that breaks most often: idempotent payment retries.

  • Context — At PayGrid, failed UPI webhooks were causing duplicate retry charges during traffic spikes.
  • What I did — I rebuilt the worker queue in Python and PostgreSQL with idempotency keys and exponential backoff.
  • Result — Duplicate charges dropped to zero across 1.2M weekly transactions and p95 latency fell from 2.4 s to 0.6 s.
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