You will get API Integration Expert | API Gateway Solution Developer | Data Sync via API
Rising Talent
Rising Talent
Project details
I am an API Integration Specialist, and I’m here to help you connect your applications with any third-party service through reliable, secure, and well-documented API integrations.
With hands-on experience building and integrating APIs in Node.js, Express, and React Native, I’ve helped startups and enterprises automate workflows, sync data across platforms, and unlock the full power of external services through custom API solutions.
🔧 Services I Offer:
RESTful & GraphQL API Integration.
Third-party APIs (Stripe, Twilio, Firebase, Google Maps, PayPal, SendGrid, etc.).
Custom backend-to-backend API communication.
Webhooks setup and processing.
API authentication (OAuth2, API keys, JWT).
API Gateway setup and configuration (including AWS API Gateway).
Scheduled data sync (cron jobs, real-time sync).
Error handling, retries, and rate limiting.
Postman collections, API documentation & testing.
⚙️ Typical Use Cases:
Integrating payment gateways (e.g., Stripe, Razorpay).
Real-time chat and notification systems using APIs.
Connecting mobile apps to cloud services.
Data migration or syncing across SaaS platforms.
Building API layers for frontend/mobile apps.
With hands-on experience building and integrating APIs in Node.js, Express, and React Native, I’ve helped startups and enterprises automate workflows, sync data across platforms, and unlock the full power of external services through custom API solutions.
🔧 Services I Offer:
RESTful & GraphQL API Integration.
Third-party APIs (Stripe, Twilio, Firebase, Google Maps, PayPal, SendGrid, etc.).
Custom backend-to-backend API communication.
Webhooks setup and processing.
API authentication (OAuth2, API keys, JWT).
API Gateway setup and configuration (including AWS API Gateway).
Scheduled data sync (cron jobs, real-time sync).
Error handling, retries, and rate limiting.
Postman collections, API documentation & testing.
⚙️ Typical Use Cases:
Integrating payment gateways (e.g., Stripe, Razorpay).
Real-time chat and notification systems using APIs.
Connecting mobile apps to cloud services.
Data migration or syncing across SaaS platforms.
Building API layers for frontend/mobile apps.
Programming Languages
JavaScript, Python, Ruby/Ruby on RailsCoding Expertise
Performance Optimization, SecurityWhat's included $100
These options are included with the project scope.
$100
- Delivery Time 2 days
- Number of Revisions 2
- Number of Pages 2
Frequently asked questions
1 review
(1)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
GO
Glen O.
Sep 6, 2025
Development work for a SaaS platform
Mudassar is a diligent and capable developer who is an asset to any team.
He is responsive and communicative and will provide suggestions to help make things better.
He is able to quickly grasp an understanding of the project and if he is unsure of anything, he will perform research and due diligence before commencing the activity.
He is responsive and communicative and will provide suggestions to help make things better.
He is able to quickly grasp an understanding of the project and if he is unsure of anything, he will perform research and due diligence before commencing the activity.
About Muddasar
Full Stack Developer | Ruby on Rails & React | SaaS Platforms
Lahore, Pakistan - 10:38 am local time
I don't just write code. I close gaps that cost you money and customers.
The proof:
🔧 Built a complete Twilio SMS system from scratch at CoachVantage for confirmations, reminders, cancellations, reschedules, fully automated with consent management and credit-based billing. Result: zero double charges. Ever.
💳 Walked into a production system leaking money through duplicate Stripe and PayPal invoices and fixed it before it became a customer-trust problem.
⚙️ Integrated Hasura GraphQL into a Rails backend → 45% faster data fetch. Added Redis caching under heavy load → 40% faster API response times.
Here's how I work: I don't wait for instructions, I ask the right questions before writing a single line. I don't disappear mid-project. I own what I build from start to finish, no hand-holding required.
My stack, if you're checking boxes:
Languages: JavaScript, TypeScript, Python, Ruby
Frontend: React.js, Next.js, React Native, Tailwind CSS, Redux, Vite, Jest
Backend: Ruby on Rails, REST APIs, GraphQL, RSpec, Sidekiq, JWT, OAuth 2.0
Databases: PostgreSQL, MySQL, MongoDB, Redis, DynamoDB
Cloud: AWS (EC2, S3, RDS, Lambda, SQS), Docker, GitHub Actions, CI/CD
Integrations: Stripe, Twilio, Mailchimp, Mandrill, Webhooks, OpenAPI
If your project touches any of this then let's talk. I don't miss deadlines, and I don't do "good enough."
Steps for completing your project
After purchasing the project, send requirements so Muddasar can start the project.
Delivery time starts when Muddasar receives requirements from you.
Muddasar works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Gathering
Collect API documentation, credentials, and integration goals.
Platform & Use Case Analysis
Understand your tech stack and how the API fits into your workflow.