Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop, fix and integrate any API
Zain Ul Abdeen
Level 2
7 orders in queue
4.8
4.8
Gig Summary
What people loved about this freelancer
samarabishop
Australia
Zain is absolutely amazing! nd I cannot recommend him enough! He helped me create a fully custom app that my clients now move through revelation by revelation...
christianale529
United States
This guy did a super duper rock solid job. My middleware provider couldn't get Amazon orders because of PII data. My shop is Woo and he built an order management...
danfo78
Singapore
Zain is very professional in his work and always willing to go extra mile to complete the project. he is pro active to initial new ideas to fine tune the product....
rkp2026
United Kingdom
Zain went above and beyond to make our project a success. Our project is highly complex and involves critical core information, with many technically challenging...
rosturdy
United Kingdom
gave him a deadline of 48 Hours and he delivered well within that time frame for me, done more than i asked and cannot express how professional and polite he...
About this gig
I am a professional API integration developer who connects your website or application to the tools your business depends on including payment gateways, SMS services, CRMs, AI platforms, and more.
What I Do
- Third-party API integration for websites and web applications
- Payment gateway integration
- Custom REST API development
- API bug fixing and troubleshooting
- Webhook setup and automation
- API authentication...
APIs I have Worked With
Payments: Stripe, PayPal, Skrill, Payeer, Perfect Money, 2Checkout, Payfast
Crypto: Coinbase, CoinPayments, CoinGate, Block.io
Messaging: Twilio, Plivo, Vonage, SendGrid
AI & Data: OpenAI, Google Sheets, Airtable
CRM & More: ActiveCampaign, CallRail, X (Twitter), USPS, and many more
Platforms & Technologies
Node.js, React, Laravel, CodeIgniter, PHP, WordPress, Shopify, Wix, and custom web applications.
How It Works
1. Send me your API documentation and requirements
2. I review the API and confirm the price and timeline
3. I integrate, test, and deliver fully working code
Not sure if your API is supported?
Send me the documentation before placing an order, and I will confirm whether I can work with it.
Get to know Zain Ul Abdeen
Zain Ul Abdeen
Automation and Integration Developer
Level 2
- FromPakistan
- Member sinceApr 2024
- Avg. response time1 hour
- Last delivery1 day
Languages
English, Urdu, Hindi
I help businesses connect their platforms and automate repetitive work through API integrations.
Typical projects: syncing Shopify orders with CRMs and Xero, building WhatsApp systems with Twilio, connecting payment gateways, and adding OpenAI to real workflows. I also build AI-powered websites and custom backend systems.
Stack: Laravel, REST APIs, webhooks, Shopify API and n8n.
I confirm scope before starting, write clean code you fully own, and stay available after delivery.
Tell me which systems need to talk to each other and I will suggest the simplest way to connect them.
My Portfolio
Other Software Development Services I Offer
FAQ
What’s your handover process?
Source code + env templates + README + loom/notes for setup.
Timezone & communication?
UTC+5. I share daily updates and respond within 12 business hours (usually faster).
Can you work with existing teams?
Yes—Git flow, ticketing (Jira), and daily/weekly standups.
How do you manage quality?
Milestones, code reviews, and brief test coverage. I also document endpoints and environment variables.
Do you sign NDAs?
Yes—happy to sign and work in private repos.
Reviews
53 reviews for this Gig
| (48) | ||
| (3) | ||
| (0) | ||
| (0) | ||
| (2) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
C 
christianale529
United States
This guy did a super duper rock solid job. My middleware provider couldn't get Amazon orders because of PII data. My shop is Woo and he built an order management system with my Restricted Amazon API I got and it works flawlessly. Order in to Woo. Waits for my Coffee roaster to API back the tracking info...
$200-$400
Price
6 days
Duration
Z 
Seller's Response
Helpful?R rkp2026
United Kingdom
Ongoing collaborationZain did a great job completing the Safe Space Workplace video calls testing task. He thoroughly tested the full user journey from both the client and practitioner/provider perspectives, including joining the call, checking permissions, verifying audio and video functionality, and successfully ending...
$50
Price
6 days
Duration
Z Seller's Response
Helpful?S samarabishop
Australia
Ongoing collaborationZain is absolutely amazing! nd I cannot recommend him enough! He helped me create a fully custom app that my clients now move through revelation by revelation before downloading a beautiful keepsake PDF. This was not a simple build, with live chart data, AI-generated readings written in my voice and...
$200-$400
Price
12 days
Duration
Z Seller's Response
Helpful?P 
probestone
Morocco
Ongoing collaborationAmazing dev, highly recommend! ⭐⭐⭐⭐⭐ Honestly, thank you so much bro! You did a really great job and I’m very happy with what you made for me. You were helpful, easy to work with, and everything went smoothly. I’ll definitely come back to you again if I need anything in the future. You’ll be my first...
$50
Price
7 days
Duration
Z Seller's Response
Helpful?R rkp2026
United Kingdom
Ongoing collaborationZain went above and beyond to make our project a success. Our project is highly complex and involves critical core information, with many technically challenging and difficult elements that required a high level of expertise, attention to detail, and precision. Zane was able to take on these challenges...
$200-$400
Price
7 days
Duration
Z Seller's Response
Helpful?
Reviews
53 reviews for this Gig
| (48) | ||
| (3) | ||
| (0) | ||
| (0) | ||
| (2) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
C christianale529
United States
This guy did a super duper rock solid job. My middleware provider couldn't get Amazon orders because of PII data. My shop is Woo and he built an order management system with my Restricted Amazon API I got and it works flawlessly. Order in to Woo. Waits for my Coffee roaster to API back the tracking info...
$200-$400
Price
6 days
Duration
Z Seller's Response
Helpful?R rkp2026
United Kingdom
Ongoing collaborationZain did a great job completing the Safe Space Workplace video calls testing task. He thoroughly tested the full user journey from both the client and practitioner/provider perspectives, including joining the call, checking permissions, verifying audio and video functionality, and successfully ending...
$50
Price
6 days
Duration
Z Seller's Response
Helpful?S samarabishop
Australia
Ongoing collaborationZain is absolutely amazing! nd I cannot recommend him enough! He helped me create a fully custom app that my clients now move through revelation by revelation before downloading a beautiful keepsake PDF. This was not a simple build, with live chart data, AI-generated readings written in my voice and...
$200-$400
Price
12 days
Duration
Z Seller's Response
Helpful?P probestone
Morocco
Ongoing collaborationAmazing dev, highly recommend! ⭐⭐⭐⭐⭐ Honestly, thank you so much bro! You did a really great job and I’m very happy with what you made for me. You were helpful, easy to work with, and everything went smoothly. I’ll definitely come back to you again if I need anything in the future. You’ll be my first...
$50
Price
7 days
Duration
Z Seller's Response
Helpful?R rkp2026
United Kingdom
Ongoing collaborationZain went above and beyond to make our project a success. Our project is highly complex and involves critical core information, with many technically challenging and difficult elements that required a high level of expertise, attention to detail, and precision. Zane was able to take on these challenges...
$200-$400
Price
7 days
Duration
Z Seller's Response
Helpful?
