Api Integrations Payments Sms And Webhooks
Home
Jaskaran
API Development
02 Feb 26
API Integrations: Payments, SMS & Webhooks Done Right
Every serious web product eventually talks to the outside world: payments, SMS OTPs, shipping labels, CRM sync, analytics. Integrations are where projects quietly fail—double charges, missed webhooks, exposed keys. As a full-stack developer, I treat integrations as core product features, not side tasks.
Idempotency and retries aren't optional
Networks fail. Users double-click pay. I design payment and webhook handlers to be idempotent: the same event processed twice shouldn't charge twice or create duplicate orders. Retry logic with backoff, dead-letter logging, and admin visibility turn mysterious production bugs into fixable tickets.
Integration checklist I follow:
Secrets in environment variables—never in git.
Webhook signature verification on every incoming request.
Sandbox testing with realistic failure scenarios before go-live.
Structured logs that tie provider IDs to your internal order IDs.
SMS, email, and notifications users trust
OTP flows and order updates need reliable delivery and clear fallbacks. I integrate SMS and email providers with rate limits, templating, and unsubscribe compliance where required. Users should get the right message at the right time—not five duplicates because a cron job retried aggressively.
Need integrations without the firefighting?
Whether you're adding Stripe to a SaaS app or connecting an ERP to external logistics APIs, I can implement, document, and hand over monitoring you'll understand. Solid integrations build client confidence—and they're a big reason companies hire me for follow-on phases after the first release ships.