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API development & integration that makes your systems share data without manual work
Our API development & integration work means we design, build and connect APIs so your website, mobile app, ERP, CRM, payment gateway and partners exchange data reliably, instead of by spreadsheet and copy-paste. It suits businesses that run several systems and lose time or accuracy moving information between them.
By Junaid Tariq Reviewed October 2026
- Secure, versioned and documented APIs with clear error responses
- Third-party integrations with retries, logging and alerts
- Testing against sandbox and real data before go-live
Connected systems are the real product
Most companies do not have one system. They have a website, a stock tool, an accounting package, a CRM, a courier portal and a payment provider, each holding part of the truth.
When these do not talk, staff retype orders, stock goes out of sync and reports disagree. Integration is the work that stops that.
There are two sides to it. API development means building interfaces so other software can use your data, for example an API that lets a mobile app read orders or a partner submit bookings. Integration means consuming other people's APIs: pushing an order to a courier, pulling payment status from a gateway or syncing contacts to a CRM. Most projects involve both, and the hard parts are the same: authentication, errors, data mapping and what happens when the other system is slow or down.
We keep the design plain. REST with JSON covers most needs, GraphQL where clients need flexible queries, webhooks for events and queues for work that must not be lost. The aim is an integration your next developer can read, and one that a failed request at midnight does not silently break.
Integrations we build
Frequent combinations.
Ecommerce to ERP and inventory
Orders, stock and prices flowing between Shopify, WooCommerce or Magento and your back office.
Payment and checkout
Gateway connections, webhooks for payment status and reconciliation views for accounts staff.
Courier and logistics
Rate quotes, booking, labels and tracking updates with local and international carriers.
CRM and marketing tools
Lead capture to CRM, WhatsApp business messaging and email platforms with consent handling.
Mobile app backends
Authenticated APIs that serve app screens, push notifications and offline sync.
Partner and public APIs
Documented interfaces for resellers, agencies or customers, with keys, limits and usage reports.
Why trust this team with your build
For API Development & Integration, projects live or die on maintainability. Here is what stands behind the delivery.
Hands-on experience
500+ websites and web applications delivered over 18+ years for clients in 48 countries, the experience behind your API Development & Integration project.
Certified expertise
For API Development & Integration, engineering is planned together with SEO, speed and reporting, so what ships is findable, fast and measurable rather than just finished.
Recognised work
Led by Junaid Tariq, a National Level Award Winner in Digital Marketing who also builds WordPress plugins, CRMs and web applications. See the about page.
Transparent by default
A written scope and milestones before build, code and documentation handed over at the end and hosting or domain accounts kept in your name.
Deliverables
The parts that make an integration trustworthy.
- Integration mapA diagram of systems, data flows, owners and triggers, agreed before development.
- API specificationOpenAPI or similar documentation, with example requests and responses that developers can try.
- Authentication and authorisationAPI keys, OAuth or tokens as appropriate, with scopes so each client sees only what it needs.
- Data mapping and validationClear rules for field conversion, duplicates and missing values, with rejects logged rather than lost.
- Error handling and retriesQueues, backoff and dead-letter handling so temporary failures recover on their own.
- Monitoring and alertsLogs and dashboards showing volumes, failures and latency, with alerts to the right people.
- Test suite and sandboxAutomated tests and a safe environment for partners to test against.
Talk to Junaid about API Development & Integration
Send your name and number. We reply on WhatsApp with what we would do first. Free, no obligation.
From mapping to live traffic
A methodical sequence avoids the classic surprises.
- Inventory of systems and dataWe list each system, its API or export options, rate limits, owners and costs.
- Design of flows and ownershipFor every data item we decide which system is the source of truth and how conflicts are resolved.
- Build and test with sandboxesWe develop against test accounts, replaying realistic cases including cancellations, refunds and partial shipments.
- Parallel runThe integration runs alongside manual processes for a short period so differences can be examined.
- Go-liveCut-over at a low-traffic time with a rollback plan and watching eyes.
- Run and improveWe review error logs and edge cases after launch and tune retries and alerts.
Interface styles and where each fits
We pick the style that suits the consumer, not fashion.
Style | Best for | Note |
|---|---|---|
REST with JSON | Most web and mobile backends | Easy to document and test |
GraphQL | Apps needing flexible data queries | Needs care over query cost and caching |
Webhooks | Event notifications such as payment confirmed | Always verify signatures and handle repeats |
SOAP or XML | Older enterprise and government systems | Still common; needs careful tooling |
File exchange (CSV, SFTP) | Legacy partners and bulk transfers | Slow but sometimes the only option |
Message queues | High-volume or critical background work | Adds infrastructure to run |
Factors that drive cost and timeline
We quote after the system inventory.
Number of systems
Each connection adds mapping, testing and monitoring.
Quality of the other side's API
Good documentation and sandboxes shorten the work. Poor ones add discovery and waiting.
Data volume and frequency
Real-time sync for thousands of events needs more engineering than a nightly job.
Security needs
Sensitive or regulated data requires stricter authentication, logging and review.
Error tolerance
If a lost message costs money, we invest in queues and reconciliation.
Documentation needs
Public or partner APIs need developer docs, keys management and support routines.
Cases where integration is not the answer
If three tools do overlapping jobs, connecting them preserves complexity.
Screen-scraping or unofficial endpoints break without notice.
Where a custom bridge is unavoidable, we build it with monitoring and say plainly that it is fragile.
If you are comparing paths, read WhatsApp plus CRM automation for one typical case.
Versioning, documentation and long-term care
Change a field name carelessly and a partner's checkout stops working.
Changes that only add fields are safe; changes that remove or reshape them get a new version.
A clear specification, working examples and a plain list of error codes cut support requests and make onboarding a new partner a matter of days.
Over time, integrations decay because the other side changes: a courier updates its endpoint, a gateway retires a field, a platform tightens its rate limits. A light monitoring routine and a named owner catch these early.
We offer maintenance on a retainer or per incident, and we hand over the monitoring setup so your team can see problems before customers do.
This is also where a maintenance and support plan earns its keep.
Proof by method: what you can inspect
You see sample payloads, a reconciliation report comparing records in both systems, the error log from the parallel run and the alert rules we set. If a number does not match, you can trace it.
We work from Gulberg III in Lahore with overlap for UK, UAE and US business hours, and invoice international clients in USD.
For connected builds, see Laravel module development, Shopify payment gateway integration and our software development services.
What clients say
Verbatim reviews from our Google profile.
“Sir Junaid Tariq is such a great human being and always motivate me to work hard and achieve life goals.”
“Best person for digital marketing, has complete knowledge at expert level. Highly recommend to every business owner.”
“Our website has jumped to the first page for numerous competitive keywords, and organic traffic has increased by 150%!”
- 18+ years in SEO, paid media and web development
- Google Ads and Analytics certified; Google Blue and Green Belt certified
- National Level Award Winner in Digital Marketing
Frequently asked questions
Straight answers before you get in touch.
What is the difference between API development and API integration?
Development builds an interface that others can call. Integration connects your system to someone else's interface. Most projects need both, and we plan them together.
How do you keep integrations secure?
We use token-based authentication, least-privilege scopes, encrypted transport and signature checks on webhooks. Secrets are stored outside the code, and access is logged. We also advise on rotating keys and reviewing permissions.
What happens when the other system goes down?
Requests are queued and retried with increasing delays, and persistent failures raise an alert. Nothing should vanish silently. We test these situations deliberately before go-live.
Can you integrate with Pakistani couriers and gateways?
Yes, where they provide APIs or structured exchange. Quality varies, so we check documentation and test access early. See our post on custom payment gateway plugins for Pakistani stores.
Do you document the APIs you build?
Yes. We deliver an OpenAPI specification, example calls and a short guide, so your team or partners can use the API without asking us.
Can you take over a broken integration?
Yes. We review the code and logs, identify the failure points and repair or rebuild it, telling you which is cheaper.
Systems not talking to each other?
List the tools you use and the data you retype today. We will map the flows and suggest the simplest reliable way to connect them.
- Free audit and honest recommendations, no obligation
- Direct access to the expert, no junior hand-offs
- Reply within minutes on WhatsApp during business hours