You will get API Developer | Integration Specialist
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Top Rated
Project details
As an API Development Specialist, I specialize in building high-quality, scalable, and efficient APIs for web applications. With years of experience in API development, integration, and automation, I have the technical skills and expertise that meet or exceed your expectations.
I offer a wide range of services to clients, including custom API development, API integration, API automation, and API documentation. I also well-versed in various API web flows, such as REST and SOAP, and can help clients select the best approach for their specific needs.
My expertise includes building responsive and user-friendly interfaces, optimizing API performance, conducting rigorous testing to ensure that the final product is of the highest quality, and integrating third-party APIs.
One of my greatest strengths as an API Development Specialist is my ability to communicate effectively and collaborate with my team to ensure that the project is delivered on time and meets the client's requirements.
Contact me today to discuss your project requirements and learn more about how I can help you achieve your API development goals.
I offer a wide range of services to clients, including custom API development, API integration, API automation, and API documentation. I also well-versed in various API web flows, such as REST and SOAP, and can help clients select the best approach for their specific needs.
My expertise includes building responsive and user-friendly interfaces, optimizing API performance, conducting rigorous testing to ensure that the final product is of the highest quality, and integrating third-party APIs.
One of my greatest strengths as an API Development Specialist is my ability to communicate effectively and collaborate with my team to ensure that the project is delivered on time and meets the client's requirements.
Contact me today to discuss your project requirements and learn more about how I can help you achieve your API development goals.
Web Programming Project
Blockchain Development, API Development, API Integration, Data DashboardProgramming Languages
JavaScript, Python, ASP.NETCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$200
|
Standard
$500
|
Advanced
$800
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 0 | 1 | 2 |
Source Code | - |
Frequently asked questions
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WH
Wade H.
May 31, 2026
OpenEMR/EHR System Administrator/Full Stack Developer - Please read details
Good communication and made best efforts to complete tasks as assigned.
MB
Muhammad B.
May 20, 2026
Full Stack Developer for B2B Analytics
Hafiz did a great job on our B2B Analytics platform. He handled both frontend and backend development professionally and delivered clean, reliable work. Communication was smooth, he understood requirements quickly, and solved issues proactively. His full-stack and API experience added great value to the project. I’d gladly work with him again and highly recommend him.
OA
Oscar A.
May 11, 2026
Website redesign & Api implementation
Hafiz was great!
NQ
Nicolas Q.
May 10, 2026
Senior Full-Stack Engineer for B2B Dashboard Development
Usman did an excellent job throughout our collaboration. He fulfilled all requirements on time, was highly ambitious, solution-oriented, and consistently brought in creative ideas we hadn’t even considered ourselves. Communication was smooth and professional at all times. I would definitely work with him again and can highly recommend him.
AH
Ali H.
Apr 19, 2026
POS app with modern dashboard
Very impressed with the quality of this POS application. The modern dashboard is clean, responsive, and easy to use. Communication was smooth throughout the project. Would definitely hire again.
About Hafiz Usman
Full-Stack Architect | Scaling Web Systems & AI Integration
91%
Job Success
Darwen, United Kingdom - 5:00 pm local time
When you scale, your architecture breaks. When you integrate third-party APIs,
data syncs fail. When you deploy, downtime costs money. I architect systems
that solve these problems at their root—not patch them.
With 85+ projects and $200K+ in products architected, I've learned the
difference between code that works today and systems that work at enterprise scale.
THE PROBLEMS I SOLVE
Scaling Web Applications: Your current architecture can't handle 10K concurrent users?
I design systems with database optimization, caching strategies, and async patterns
that reduce latency by 60%+ and infrastructure costs by 30-40%.
E-Commerce Integration: Running Shopify but hitting its limitations? I build custom
backends, payment orchestration (Stripe), real-time inventory sync, and conversion-focused
design that typical agencies can't deliver.
API & Data Integration: Struggling with third-party APIs (HubSpot, Salesforce, custom webhooks)?
I design integration architectures that don't break, with proper error handling, monitoring,
and event-driven workflows.
Multi-Platform Development: Need your product on web, iOS, and Android without rebuilding
three times? I architect unified systems using React/React Native that share 70%+ of code.
AI-Powered Features: Embedding LLMs, RAG pipelines, or agentic workflows without budget
explosion? I design intelligent systems with cost optimization and proper orchestration.
HOW I WORK
First, I diagnose. I ask: "What's actually breaking when you scale? What's your real constraint?"
Not everyone needs GraphQL; sometimes REST + proper caching solves it cheaper.
Then, I architect before coding. You see the full technical strategy upfront—you understand
the trade-offs (fast vs. reliable vs. cheap; pick two).
Finally, I execute with reliability first. Monitoring, error handling, graceful degradation.
Your platform doesn't crash, and your next engineer can maintain this without needing me.
RECENT PROJECT: BigPhotoHunt (Full Stack Ownership)
Architected a high-traffic social platform from ground up. Designed all APIs, database schema,
and AWS infrastructure. Scaled from 0 to 50K+ daily active users with zero production incidents.
Optimized Core Web Vitals (LCP: 2.8s → 900ms). Zero-downtime deployment strategy kept the
platform live through 100+ releases.
WHO I'M THE RIGHT FIT FOR
You're scaling or migrating (not building a landing page).
You value reliability and thoughtful architecture over "quick and cheap."
You need 40+ hours/week dedicated focus (I'm selective about projects).
You think of me as a technical co-founder, not "developer for hire."
LET'S TALK
Click "Invite" and let's jump on a 15-minute discovery call.
I'll ask about your constraints, timeline, and what's breaking.
Then I'll tell you honestly whether I can help.
—Usman
Steps for completing your project
After purchasing the project, send requirements so Hafiz Usman can start the project.
Delivery time starts when Hafiz Usman receives requirements from you.
Hafiz Usman works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis & API Design
I will thoroughly analyze client needs and system requirements for API integration. I'll design the API architecture, endpoints, and data structures.
API Development & Testing
I'll code the APIs following best practices and industry standards. Rigorous testing will be conducted to ensure they function correctly and handle different scenarios.