You will get I will build custom API integrations for payments and shipping
Project details
This project is focused on delivering reliable third-party API integrations (Stripe, PayPal, Shopify, ShipStation, and more) for your website or app. What sets me apart is my ability to provide secure, clean, and well-documented solutions that work seamlessly in the background, so you can focus on growing your business. With experience in both payment gateways and eCommerce APIs, I ensure every integration is efficient, optimized, and future-ready.
Programming Languages
PHP, JavaScript, PythonCoding Expertise
PSD to HTML, Performance Optimization, DesignWhat's included $100
These options are included with the project scope.
$100
- Delivery Time 5 days
- Number of Revisions 2
About Sajid
Building Scalable Web & Mobile Apps | React Native | Laravel | DevOps
Karachi, Pakistan - 3:56 am local time
💡 Core Expertise
Mobile Apps: React Native, Flutter, Ionic
Frontend: React, Next.js, Angular, Vue.js
Backend: PHP (Laravel, Yii1/Yii2), Node.js (Express, Nest.js), Python (Django, Flask, FastAPI)
Databases: MySQL, PostgreSQL, MongoDB, Firebase
DevOps: Docker, CI/CD, Nginx, AWS, DigitalOcean, Cloud Deployments
⚙️ What I Do
✅ Take over existing or legacy projects and bring them back to life
✅ Build new mobile and web applications from scratch
✅ Optimize performance, clean up codebases, and scale systems
✅ Manage full product lifecycle — from planning to deployment
🏆 Highlighted Projects
🥇 Food Delivery App – Top 25 in Food & Drinks (App Store Denmark)
Crypto Price Monitoring Platform
Multi-level Marketing & Affiliate Engine
Ride-Sharing App for Drivers & Riders
Ad Server & Analytics System
💬 Let’s Build Something Great
I’m passionate about turning ideas into scalable, production-ready solutions.
Even if you’re not sure how to start, reach out — I’ll help you plan your roadmap and make your vision real.
🧠 3️⃣ Skills (Add All These)
(These keywords boost your ranking in Upwork search)
Frontend: React.js, Next.js, Angular, Vue.js, JavaScript, TypeScript
Mobile: React Native, Flutter, Ionic
Backend: Laravel, Node.js, Express.js, Nest.js, Django, Flask, FastAPI, PHP
Database: MySQL, PostgreSQL, MongoDB, Firebase
DevOps: AWS, DigitalOcean, Docker, Nginx, CI/CD, PM2
Others: API Development, REST API, GraphQL, Performance Optimization, Legacy Code Refactoring, SaaS Development
Steps for completing your project
After purchasing the project, send requirements so Sajid can start the project.
Delivery time starts when Sajid receives requirements from you.
Sajid works on your project following the steps below.
Revisions may occur after the delivery date.
Kickoff & Access
Requirement confirm, reference site review, API keys/credentials (Stripe/PayPal/Square/Shopify/ShipStation), staging env vars set.
Data & Flow Design
Endpoints, request/response, DB tables (orders/requests/payments/shipments) and split logic define.