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Fiverr Pro
English
$
USD
I will do custom api integration rest api and webhooks
Shahab Imtiaz
About this gig
Are broken webhooks, failed payment checkouts, or messy backend integrations slowing down your product?
I design and implement production-ready API integrations that keep your web application fast, secure, and fully automated. Whether you need a seamless Stripe subscription setup, multi-platform OAuth, or custom REST and GraphQL endpoints, I deliver enterprise-grade code that scales effortlessly.
What I Integrate & Build:
Payment Gateways: Stripe (Subscriptions, Checkouts, Webhooks), PayPal
Authentication: OAuth 2.0, Supabase, JWT, Social Logins
Third-Party APIs: REST API, GraphQL, Twilio, Brevo, CRM & SaaS platforms
Tech Stack Expertise: Next.js, NestJS, React, Node.js, Laravel, WordPress
Why Work With Me?
Clean, modular, and fully documented codebase
End-to-end testing with Postman prior to delivery
Built-in error handling and fallback logic to protect data integrity
100% focus on security, performance, and long-term scalability
Please send a quick message with your API docs or project requirements before placing an order!
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Shahab Imtiaz
Shahab Imtiaz
SaaS, AI Automation and Payment Systems Developer
- FromPakistan
- Member sinceSep 2021
- Avg. response time1 hour
- Last delivery5 months
Languages
English
I help founders and operations teams turn prototypes and manual workflows into secure, production-ready software. With 7+ years of experience, I have delivered 30+ products, including healthcare platforms and AI systems used at scale. I specialize in Next.js, Node.js, Supabase, Stripe, n8n, OpenAI and AWS. You will get clear scoping, maintainable code, frequent updates and a clean handover for SaaS MVPs, AI agents, automation workflows and payment integrations.
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FAQ
What do you need from me before we start?
I need your project scope, official API documentation links or API keys, and access to your codebase (GitHub/GitLab) or server environment. Please send me a message prior to ordering so we can confirm technical feasibility.
Which technologies and backend stacks do you support?
I specialize in modern JavaScript/TypeScript ecosystems including Next.js, NestJS, React, and Node.js, as well as PHP (Laravel, WordPress) and Supabase/PostgreSQL backends. Feel free to contact me if you have a custom setup.
Can you handle payment gateways like Stripe and PayPal?
Yes! I set up one-time checkouts, recurring subscriptions, and webhooks. I ensure webhooks are built with built-in retry and fallback logic so payment statuses always sync accurately with your database.
How do you test the API integration before delivery?
Every integration is thoroughly tested using Postman for end-to-end payload validation. I test response handling, edge cases, and error codes to guarantee stable execution in your production environment.
Is my API key and client credential data secure with you?
Strictly yes. I follow industry security best practices. You can provide sandbox/test environment keys during development, and all sensitive values will be structured safely using environment variables (.env).
