Third-Party API Integrations

Reliable integrations with the external APIs and platforms your business depends on, built to handle failures, rate limits, and data mismatches gracefully.

API & Integrations

Third-Party API Integrations

req/s, zero deadlocks
15Kreq/s, zero deadlocks
double-charges in production
0double-charges in production
production systems shipped
10+production systems shipped
years building for clients
7+years building for clients
Sound familiar

Signs you need this now.

Third-party APIs rarely behave exactly like their documentation suggests, and integrations built quickly often break the first time a rate limit hits or a response format changes unexpectedly. Getting an integration production-ready means handling the edge cases the vendor's docs never mention.

01

An integration that works until it doesn't

It runs fine for weeks, then a rate limit or an unannounced API change breaks it silently with no alert. Nobody notices until data stops flowing and someone asks why numbers look wrong.

02

Data that doesn't map cleanly between systems

Field formats, units, and structures differ between your system and the third-party platform, and mismatches quietly corrupt data instead of throwing a clean error. Untangling that after the fact takes far longer than getting the mapping right up front.

03

No fallback when the external service goes down

A dependency on someone else's uptime becomes your downtime the moment their API has an outage. Without retry logic and graceful degradation, a third-party incident becomes your incident too.

Scope

What you get.

Robust error handling and retry logic

Failed requests are retried with backoff, and persistent failures trigger alerts instead of silently dropping data, so integration issues get caught immediately, not weeks later.

Rate limit and quota management

Requests are throttled and queued to stay within the third-party platform's limits, preventing the integration from getting your account rate-limited or banned.

Data mapping and transformation layer

Data formats between the two systems are mapped and validated explicitly, so mismatches get caught and handled instead of silently corrupting records.

Webhook and polling support as needed

Real-time updates are handled via webhooks where the platform supports them, with polling as a reliable fallback for platforms that don't.

Monitoring and failure alerting

The integration is monitored continuously, with alerts firing the moment sync failures or anomalies occur, so problems get caught before they compound.

Documentation of the integration's actual behavior

Beyond the vendor's docs, you get a written record of how the integration actually behaves in practice, including quirks and edge cases discovered during the build.

How it works

Four steps, no mystery.

01

Quick scoping call

A short call (or async over WhatsApp) to understand what you're working with and what "done" actually looks like for you.

02

Fixed scope, no surprises

A clear written plan of what's included and how long it takes, before any work starts.

03

The actual work

Progress you can see, not a black box. You get updates as milestones land, not just a status report at the end.

04

Handover

Everything documented and handed over cleanly, with a walkthrough so your team isn't stuck waiting on me for routine changes.

Questions

Frequently asked.

A broad range including payment processors, CRMs, marketing platforms, shipping providers, and internal enterprise systems; if it has an API, it can generally be integrated.

Start here

Tell me what you're dealing with.

Send a message and get a real reply within 24 hours, not an automated sequence.

Prefer email? info@hasnain.io

Or WhatsApp directly, same link as above