System Design: Building a Bulletproof Payment Gateway! 🚀 Basic payment setups fail during network timeouts. To block catastrophic duplicate charges, enforce client-generated idempotency keys (UUIDs). The server saves this key first; if a duplicate request arrives, it immediately returns the cached result instead of re-charging the buyer. Never overwrite database rows to update payment statuses. Instead, implement an immutable ledger where every state change—authorized, captured, or refunded—cre

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Your face is probably in a database you have never heard of. Public photos on social media can get scraped into facial recognition databases, indexed by AI tools, and used in ways you probably never agreed to. The scary part is that nobody has to hack you to do it. You posted it publicly, and the internet has a long memory. #Cybersecurity #AI #Security #Privacy #technology

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S-Line Filter: Edit Database