You will get A Seamless API Integration for Your Web App
Project details
Connect your app to any third-party API with clean, typed, production-ready code.
I integrate REST APIs, GraphQL endpoints, webhooks, and third-party services into your existing codebase. Every integration includes proper TypeScript types, error handling, and documentation.
Common integrations I handle:
• Payment: Stripe, PayPal, Square
• Auth: OAuth 2.0, JWT, social logins
• Communication: Twilio, SendGrid, Mailchimp
• AI: OpenAI, Anthropic, Replicate
• Database: Supabase, Firebase, MongoDB, PostgreSQL
• Cloud: AWS, Google Cloud, Vercel
What you get:
• Typed API client with full error handling
• Webhook setup and validation
• Environment-based configuration
• Integration tests
• Clear documentation for your team
Your integration will be maintainable, secure, and ready for production.
I integrate REST APIs, GraphQL endpoints, webhooks, and third-party services into your existing codebase. Every integration includes proper TypeScript types, error handling, and documentation.
Common integrations I handle:
• Payment: Stripe, PayPal, Square
• Auth: OAuth 2.0, JWT, social logins
• Communication: Twilio, SendGrid, Mailchimp
• AI: OpenAI, Anthropic, Replicate
• Database: Supabase, Firebase, MongoDB, PostgreSQL
• Cloud: AWS, Google Cloud, Vercel
What you get:
• Typed API client with full error handling
• Webhook setup and validation
• Environment-based configuration
• Integration tests
• Clear documentation for your team
Your integration will be maintainable, secure, and ready for production.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$100
|
Standard
$200
|
Advanced
$350
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | |
Content Upload | |||
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
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SY
Sara Y.
Jun 15, 2026
Website Development from Canva Design – B2B Company Website (HTML/CSS or WordPress)
Arefin did a good job completing the job post successfully. He was fast to answer and I could also ask for his professional help in other matters.
MT
Maria T.
Jan 27, 2026
Backend Developer (Node.js or Python) Needed for Healthcare Middleware + Make.com Integration Layer
MT
Maria T.
Jan 13, 2026
Backend Developer (Node.js or Python) Needed for Healthcare Middleware + Make.com Integration Layer
Arefin delivered the agreed technical scope and successfully implemented complex integrations across booking, screening, EHR, video, and AI components. He is technically skilled, structured in his approach, and capable of handling non-trivial backend and integration work. I appreciate the work put into delivering the technical foundation.
KL
Kurt L.
Nov 24, 2025
Website Recreation with New UI Design
Great experience. Will work with Arefin again.
KL
Kurt L.
Nov 12, 2025
Website Recreation with New UI Design
Quick turn around, great communication. Will hire again!
About Arefin
Full-Stack Developer | AI-Powered Web Apps | React, Next.js, OpenAI
89%
Job Success
Dhaka, Bangladesh - 1:23 am local time
𝗥𝗲𝗰𝗲𝗻𝘁 𝗪𝗼𝗿𝗸
A B2B company website rebuilt from Canva designs (5.0★),
A UI/UX website recreation with full redesign (5.0★, "Great experience, will work with Arefin again"), and TaskNotch, a Google Workspace-integrated AI task manager built end-to-end with OpenAI API.
𝗪𝗵𝗮𝘁 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗦𝗮𝘆
"Quick turnaround, great communication. Will hire again!"
"Delivered perfectly and precisely on time."
"Technically skilled, structured in his approach, and capable of implementing complex integrations."
𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱
Website rebuilds and redesigns from Figma or Canva designs.
Full-stack SaaS apps with auth, subscriptions, and admin dashboards.
REST APIs and integrations with Stripe, Google APIs, and OpenAI.
Bug fixes and performance work on existing codebases.
𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸
React, Next.js, TypeScript, Tailwind CSS, Node.js, Django, PostgreSQL, MongoDB, Supabase, OpenAI API, Stripe, Vercel
𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸
I scope the project before writing any code, and send regular updates as I go so you're not waiting for a status check. If something's going to take longer than planned, I tell you early rather than at the deadline. You get clean, documented code and support after launch.
30+ hours/week. Response time under 12 hours. Send me a message.
Steps for completing your project
After purchasing the project, send requirements so Arefin can start the project.
Delivery time starts when Arefin receives requirements from you.
Arefin works on your project following the steps below.
Revisions may occur after the delivery date.
API & Codebase Review
I'll study the API docs and your codebase to plan the integration approach.
Build Integration Layer
Wire up the integration to your frontend/backend with all CRUD operations working.