Browse categories
Explore
Fiverr Pro
English
$
USD
I will build custom API integrations for your website web app or saas
Usman Jabbar
Level 2
4.9
4.9
Gig Summary
About this gig
Third-party APIs are where projects stall: broken auth flows, missing webhooks, rate limits, undocumented quirks. I fix that.
7+ years building and integrating APIs, including real-time flight, parking and security APIs for a US airport. 23 reviews at 4.9 stars on this exact service.
What I handle:
- Payments and billing: Stripe, PayPal, subscriptions, webhooks
- AI APIs: OpenAI, Claude and custom model endpoints
- CRM and marketing: HubSpot, Salesforce, Mailchimp, n8n or Zapier
- Shipping, maps, SMS, WhatsApp, social and data APIs
- Custom REST API development for your own product, with docs
- Secure key handling, retries and logging, done properly
Stack: Node.js, Next.js, Python, Laravel, PHP and TypeScript. If it has an API, I can connect it - and if your current integration is broken, I can rescue it.
Send the details and I will quote a fixed price with a realistic timeline.
Get to know Usman Jabbar
Usman Jabbar
Senior AI and Full Stack Engineer, AI Agents, SaaS MVPs, App Rescue
Level 2
- FromPakistan
- Member sinceAug 2020
- Last delivery3 months
Languages
Urdu, English
I build the systems companies rely on when quick builds fail. 7+ years full-stack: real-time flight, parking & security APIs for a US airport, an EU ticketing platform, a German services marketplace, and 50+ custom GPTs and AI integrations.
I help founders and teams to:
• Rescue AI/vibe-coded apps (Lovable, Cursor, Bolt) and take them to production
• Build AI agents & automations that do real work
• Launch SaaS MVPs - Next.js, Node, Supabase, Stripe
Fast, secure, scalable - and it ships. Tell me what you're building.
My Portfolio
Other Software Development Services I Offer
FAQ
Which APIs can you integrate?
Almost any REST or GraphQL API: payments, AI, CRM, shipping, maps, SMS, social and internal company APIs. If it has documentation, I can work with it.
Can you fix an integration another developer broke?
Yes. I audit the current setup, find where auth, webhooks or data mapping fail, then rebuild the broken parts and test them properly.
Do I have to give you my API keys?
You create the accounts and stay the owner. Keys go in environment variables, never hard-coded, and you can rotate them after delivery.
Do I get the source code and documentation?
Yes. Every package includes the full source code and setup notes. Premium also includes complete API documentation and deployment.
Reviews
23 reviews for this Gig
| (23) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
F fiazahmad293
United Arab Emirates
I needed a quick resolution for my website, and Usman done very professionally the contact page on my website he just did it quickly. I see his expertise and skills beyond my expectations. highly recommend him!
$50
Price
2 days
Duration
Helpful?C csteingart
Canada
Ongoing collaborationExcellent service once again. Understood the problem I was looking to solve and created a perfect solution.
$200-$400
Price
3 weeks
Duration
Helpful?M matt540
United States
Ongoing collaborationVery talented API developer. I will continue to use his expertise on our projects. Thanks!!
$200-$400
Price
10 days
Duration
Helpful?J joa1974
Spain
..............
$100-$200
Price
1 day
Duration
Helpful?C csteingart
Canada
Ongoing collaborationFantastic service. I would highly recommend!
$50
Price
3 days
Duration
Helpful?
Reviews
23 reviews for this Gig
| (23) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
F fiazahmad293
United Arab Emirates
I needed a quick resolution for my website, and Usman done very professionally the contact page on my website he just did it quickly. I see his expertise and skills beyond my expectations. highly recommend him!
$50
Price
2 days
Duration
Helpful?C csteingart
Canada
Ongoing collaborationExcellent service once again. Understood the problem I was looking to solve and created a perfect solution.
$200-$400
Price
3 weeks
Duration
Helpful?M matt540
United States
Ongoing collaborationVery talented API developer. I will continue to use his expertise on our projects. Thanks!!
$200-$400
Price
10 days
Duration
Helpful?J joa1974
Spain
..............
$100-$200
Price
1 day
Duration
Helpful?C csteingart
Canada
Ongoing collaborationFantastic service. I would highly recommend!
$50
Price
3 days
Duration
Helpful?
