Skip to content
SazM Senior DaaS

Senior full-stack development on subscription

API Integration & Webhook Development

Connect your site or app to the services it depends on — and keep it working when those services retry, time out or change. Payments, CRMs, scheduling, shipping, AI and internal APIs.

What you can queue

  • Payments — Stripe, PayPal, Razorpay, Cashfree and others: checkout, subscriptions, refunds, and webhook handling that survives duplicate and out-of-order events.
  • CRMs & marketing — HubSpot, Salesforce, Mailchimp and similar: lead sync, contact updates, two-way data flows without duplicates.
  • Operations — ERPs, inventory, shipping and scheduling APIs (e.g. MINDbody), bulk imports and exports.
  • AI APIs — OpenAI, Anthropic and Gemini integrations for content, classification and support workflows, with cost and failure handling.
  • Your own API — designing and building REST/JSON APIs and webhooks for partners and mobile apps, with authentication, rate limits and documentation.

Built to fail safely

Integrations break in production for predictable reasons: retries create duplicates, a slow third party blocks your request, credentials expire, a payload shape changes. Each integration is built with idempotency, timeouts, retries with backoff, logging and alerts, so failures are visible and recoverable instead of silent. See idempotent webhook processing.

How it works

  1. Subscribe — $999/month in USD through PayPal, with launch code SAZM50 applied. No contract; pause or cancel any month.
  2. Queue tasks in your client portal, in priority order. Unlimited requests; one active task at a time.
  3. Get the work — a 24–48 hour delivery target per task once work starts, written updates, no meetings. Code goes to your repository, and you own all of it.

Not sure yet? Run a free speed audit of your site first, or ask a question — no sales call.

Want a senior engineer on this?

SazM is a 20-year senior full-stack developer on subscription: one task at a time, a 24–48h delivery target per task, no meetings. $999/mo with launch code SAZM50 — pause or cancel any month.