Staff Software Engineer
Huzaifa Saif-ur-RehmanLaravel Integration Reliability Engineering
Huzaifa Saif-ur-Rehman is a staff software engineer specializing in Laravel, PHP, JavaScript, DevOps, SaaS architecture, and API integrations.
Presenting Telescope Guzzle Watcher
@Laravel Live Pakistan 2024, Pakistan
DEVOPS Meetup Lahore
(Open Source Foundation Pakistan) @FAST-NUCES, Lahore
COMPUTAN Annual Team Leads Dinner
@Monal Lahore, Pakistan
Presenting Pulse Guzzle Recorder
@Laravel Live Pakistan 2024, Pakistan
Laravel Live Pakistan 2024
@Pearl Continental Lahore, Pakistan
Laravel Live Pakistan 2024
@Pearl Continental Lahore, Pakistan
Laravel Live Pakistan 2024
@Pearl Continental Lahore, Pakistan
COMPUTAN Team Annual Meetup
@Lahore HeadOffice, Pakistan
Laravel Live Pakistan 2024
@Pearl Continental Lahore, Pakistan
Laravel Live Pakistan 2024
@Pearl Continental Lahore, Pakistan
Integration reliability for B2B SaaS
Your HubSpot and
Oracle NetSuite
don't agree. I make them agree, every month, with no silent data loss, so finance can
trust the numbers.
Connecting two systems is the easy part. Keeping them in sync, with no dropped records, no duplicate invoices, and no drift before month-end close, is the part that breaks. That reliability is what I build. Also SAP, Salesforce, Stripe, and custom systems, across REST, GraphQL, and SOAP.
Platforms I integrate
Years of building and maintaining integrations across the CRM, ERP, and payment systems businesses actually run on.
CRM & ERP synchronization
Keeping customer and financial systems in agreement, with no silent data loss.
HubSpot
Salesforce
Oracle NetSuite
SAP Business ByDesign
SAP Business One
Payments
Checkout, billing, marketplaces, payouts, and reconciliation.
Stripe
PayPal
Braintree
Protocols
Whatever the API speaks, I integrate it reliably.
How I make integrations reliable
Map the money and data path
I start by identifying the source of truth, sync direction, retry rules, ownership, and the points where a partial failure can hurt finance or operations.
Build for failure, not just happy paths
Webhooks, queues, idempotency, dead-letter handling, logs, and reconciliation reports make the integration recoverable when APIs timeout or payloads drift.
Leave the team with operating clarity
The goal is not a black box. Your team should know what synced, what failed, what retried, and where to look before the next month-end close.
FAQ
Frequently asked questions
Integrations live at the boundary between systems where neither side fully controls the contract. The failure modes are silent: a record drifts, a webhook times out, a field mapping shifts after an upstream update. I design for observability, idempotency, and reconciliation — so when something drifts, you know about it before finance does.
HubSpot, Salesforce, Oracle NetSuite, SAP Business One, and SAP Business ByDesign are the platforms I have built production integrations for. Each integration handles contact sync, deal/order flow, custom field mapping, webhook processing, and error recovery.
I do both. For well-supported platforms, I use official SDKs and middleware where they are reliable. For custom or legacy systems, I build direct API integrations with proper queue-based retry logic, rate-limit handling, and reconciliation jobs. The approach depends on the platform maturity and your tolerance for middleware dependency.
I have built production payment flows with Stripe, PayPal, and Braintree — including one-time payments, recurring subscriptions, refunds, webhook verification, and idempotency keys. Payment integrations go through multi-stage testing because a wrong charge is a trust-destroying event.
Yes. I have built Shopify-to-backend integrations for order sync, inventory updates, webhook processing, and custom app development. The same reliability patterns apply — queue-based processing, idempotent handlers, and reconciliation dashboards for operations teams.
Request an integration review
Tell me which systems are involved, where records drift, and what the business impact is. I will help you turn the failure modes into a practical fix plan.