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SIDDHANT JAIN

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Articles

Your Agent Retried. The Email Sent Twice.

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By SIDDHANT JAIN
| DEV Community
A practical guide to idempotency, budget guardrails, and risk gates for TypeScript AI agents — with real code. There's a class of production bug that doesn't throw an exception, doesn't show up in your error logs, and doesn't alert anyone. Your AI agent just quietly does the same thing twice. The email sends twice. The Stripe charge fires twice. The database record duplicates. No stack trace. No crash. Just a confused user and a support ticket you don't want to explain. This isn't a rare edge case.
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Why Your SaaS Node Backend Will Fail at 10k Requests/Minute (and How to Stress‑Proof It Without Rewriting)

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By SIDDHANT JAIN
| DEV Community
At 1k active users, your Node backend feels like a rock. At 3k–5k users, Stripe webhooks start retrying, background jobs pile up, and you notice the first “duplicate charge” ticket. At 8k–10k requests per minute, you’re in a live incident: jobs vanish on deploy, webhook duplicates double‑bill customers, and MFA state drifts, leaving users locked out. Node is great—but naïve implementations won’t survive SaaS‑scale. Here’s exactly what breaks and how to stress‑proof it without a full rewrite.
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The Silent Job Loss: Why Your Node.js SaaS Needs a Persistent Task Queue

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By SIDDHANT JAIN
| DEV Community
567 tests. 93.13% coverage. Here's what they protect. A user pays. Your server receives the Stripe webhook. You fire off an async task to generate their report. Thirty seconds later you deploy a hotfix. The report is never generated. The user is charged. Nobody gets an error. You find out three days later in a support ticket. This is not a theoretical failure mode. It is the default behavior of every Node.js backend that queues work in memory.
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