You will get API Development & Third-Party System Integration
Top Rated
Top Rated
Project details
You will get robust API development and seamless third-party integrations for your website or application. I build scalable REST and GraphQL APIs and integrate external platforms to automate workflows and improve data flow.
From CRMs to ERPs and eCommerce systems, I make your software work together smoothly and securely.
What I will deliver
➤ Custom REST & GraphQL API development
➤ Third-party API integrations
➤ Secure OAuth & authentication handling
➤ Webhooks & automation workflows
➤ Data synchronization & error handling
➤ API documentation & testing
➤ Long-term maintenance support
If your system needs reliable integrations, I’ll make it seamless.
Message me with your integration requirements and timelines.
From CRMs to ERPs and eCommerce systems, I make your software work together smoothly and securely.
What I will deliver
➤ Custom REST & GraphQL API development
➤ Third-party API integrations
➤ Secure OAuth & authentication handling
➤ Webhooks & automation workflows
➤ Data synchronization & error handling
➤ API documentation & testing
➤ Long-term maintenance support
If your system needs reliable integrations, I’ll make it seamless.
Message me with your integration requirements and timelines.
Programming Languages
PHP, HTML & CSS, JavaScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$300
|
Standard
$500
|
Advanced
$700
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 10 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code | - | - | - |
139 reviews
(128)
(9)
(0)
(2)
(0)
This project doesn't have any reviews.
MV
Mark V.
Jun 5, 2026
PHP Developer Needed for Pica API Integration with BookYou ERP (Google Calendar & more)
Hier is een professionele en warme review:
We are extremely satisfied with the work delivered by this team.
From the beginning, communication was clear, professional, and responsive. Throughout the entire project, they demonstrated strong technical knowledge and a genuine commitment to delivering a high-quality result. The final implementation looks great and meets our expectations.
What stood out most was their willingness to collaborate during the testing phase. As we reviewed the application and identified areas for improvement, the team remained flexible, proactive, and accommodating. They addressed feedback quickly and were happy to make additional refinements to ensure everything worked exactly as intended.
The project involved integrating Google Calendar functionality into our platform, which required careful attention to detail and compliance with Google's requirements. The team handled this professionally and guided the process smoothly.
It's refreshing to work with developers who not only complete the requested tasks but also take ownership of the quality of the final product. Their responsiveness, positive attitude, and commitment to customer satisfaction made the entire experience a pleasant one.
Based on this experience, we would not hesitate to work with this team again on future projects. We highly recommend them to anyone looking for reliable, skilled, and cooperative developers who genuinely care about delivering excellent results.
Thank you for the great work and we look forward to working together again in the future.
We are extremely satisfied with the work delivered by this team.
From the beginning, communication was clear, professional, and responsive. Throughout the entire project, they demonstrated strong technical knowledge and a genuine commitment to delivering a high-quality result. The final implementation looks great and meets our expectations.
What stood out most was their willingness to collaborate during the testing phase. As we reviewed the application and identified areas for improvement, the team remained flexible, proactive, and accommodating. They addressed feedback quickly and were happy to make additional refinements to ensure everything worked exactly as intended.
The project involved integrating Google Calendar functionality into our platform, which required careful attention to detail and compliance with Google's requirements. The team handled this professionally and guided the process smoothly.
It's refreshing to work with developers who not only complete the requested tasks but also take ownership of the quality of the final product. Their responsiveness, positive attitude, and commitment to customer satisfaction made the entire experience a pleasant one.
Based on this experience, we would not hesitate to work with this team again on future projects. We highly recommend them to anyone looking for reliable, skilled, and cooperative developers who genuinely care about delivering excellent results.
Thank you for the great work and we look forward to working together again in the future.
JD
Julie D.
May 22, 2026
Ongoing Misc. Work & Fixes
YS
Yordany S.
Mar 10, 2026
RewardDror – PWA Rewards Marketplace (SWO v2)
Syed and his team at SolCoders did an excellent job on this project. The quality of the development was outstanding and the work was delivered with a high level of professionalism. Communication was clear, they were responsive throughout the process, and they showed strong technical knowledge while implementing the required features.
I truly appreciate the effort and dedication they put into the project. It was a great experience working with them, and I would definitely recommend them to anyone looking for reliable and skilled developers. Congratulations to the entire team for a job very well done.
I truly appreciate the effort and dedication they put into the project. It was a great experience working with them, and I would definitely recommend them to anyone looking for reliable and skilled developers. Congratulations to the entire team for a job very well done.
ZB
Zina B.
Jan 12, 2026
Senior Klaviyo Expert – WordPress & FareHarbor Integration
Highly recommended, their team is very knowledgeable.
GC
Gabriel C.
Jan 9, 2026
Adjust of POS App Dynamic Tablecloth Calculator
Hamza and his team are great professionals. You can always contact with them and they will give a detailed solution in few hours, always working with a clear roadmap and precise steps to let you know in which step of the process we are.
About Syed Hamza
Full-Stack Developer | Shopify, WordPress, Laravel, React, PHP, APIs
100%
Job Success
Karachi, Pakistan - 1:04 am local time
I help businesses build, scale, and optimize high-performing websites, eCommerce platforms, and custom applications that generate real ROI — not just code.
With 8+ years of experience, 300+ five-star projects, and $90K+ earned on Upwork, I work as a Senior Full Stack Developer specializing in Shopify, Shopify Plus, WordPress, Laravel, PHP, React, and custom API integrations.
I don’t just develop websites - I deliver reliable, scalable, and revenue-focused digital solutions.
🔹 What I Specialize In
➤ Custom Shopify & Shopify Plus development (themes, apps, APIs)
➤ WordPress & WooCommerce development (plugins, themes, performance)
➤ Full-stack web applications using Laravel & PHP
➤ Backend development with Node.js
➤ Frontend development with React & modern JavaScript
➤ REST & GraphQL API integration
➤ Payment gateway & POS integrations
➤ AI integrations using OpenAI API
➤ Website speed optimization & performance tuning
Everything I build is optimized for performance, scalability, and long-term growth.
🔹 Tech Stack (Production-Ready)
➤ Backend: PHP, Laravel, CodeIgniter, Yii2, Node.js
➤ Frontend: React, JavaScript, jQuery, AJAX, JSON
➤ CMS & eCommerce: Shopify, Shopify Plus, WordPress, WooCommerce, BigCommerce
➤ APIs: REST, GraphQL, OAuth, OpenAI API
➤ Databases: MySQL
➤ Custom Work: Shopify apps, Liquid customization, WordPress plugins
Tools are chosen based on stability and ROI, not trends.
🔹 Types of Projects I Deliver
➤ Custom Shopify stores & public/private Shopify apps
➤ WordPress & WooCommerce websites and plugins
➤ eCommerce migrations & performance optimization
➤ SaaS & custom admin dashboards
➤ POS & payment system integrations
➤ API-driven platforms and automation solutions
These are real systems used by real businesses, not experiments.
🔹 Why Clients Work With Me
➤ 8+ years of professional full-stack experience
➤ 300+ five-star projects completed
➤ Top Rated profile with 100% Job Success
➤ Clean, scalable, and maintainable code
➤ Clear communication & reliable delivery
➤ End-to-end ownership from concept to deployment
I care about your business outcome, not just delivering tasks.
🔹 How I Work
➤ Understand business goals before writing code
➤ Propose clear technical solutions
➤ Deliver secure, scalable, and optimized systems
➤ Communicate clearly with regular updates
➤ Provide ongoing support when needed
I work like a long-term technical partner, not a short-term contractor.
🔹 Let’s Get Started
If you’re looking to build or improve a Shopify store, WordPress website, eCommerce platform, or custom full-stack application:
➤ Share your requirements
➤ Get clear technical guidance
➤ Let’s build a solution that performs, scales, and converts
📩 Message me today and let’s turn your idea into a high-performing digital product.
Senior Full Stack Developer, Shopify Developer, Shopify Plus Expert, WordPress Developer, WooCommerce Developer, Laravel Developer, PHP Developer, React Developer, Node.js Developer, Ecommerce Website Development, Shopify App Development, WordPress Plugin Development, Custom CMS Development, API Integration, REST API, GraphQL API, Payment Gateway Integration, POS Integration, Website Speed Optimization, Performance Optimization, BigCommerce Developer, Headless Commerce, Custom Web Applications, SaaS Development, AI Integration, OpenAI API, Liquid Developer, MySQL Database
Steps for completing your project
After purchasing the project, send requirements so Syed Hamza can start the project.
Delivery time starts when Syed Hamza receives requirements from you.
Syed Hamza works on your project following the steps below.
Revisions may occur after the delivery date.
Project Kickoff
Integration goals & scope confirmed
Access & Documentation