You will get Third-party API and webhook integration for Node.js/NestJS
Project details
I’ll connect one documented third-party API to your existing Node.js, NestJS, or Next.js backend so your application can exchange data reliably without rebuilding the whole system.
Starter covers up to 2 endpoints with API-key or bearer authentication. Standard adds up to 4 endpoints, validation, error handling, and one database-sync flow. Advanced can add OAuth or webhook processing with retries and idempotent event handling.
This service is a good fit for a documented CRM, calendar, email, notification, internal business, or other REST API. My experience includes Google Calendar OAuth, REST APIs, webhook event processing, database-backed workflows, and Node.js/NestJS integrations.
This project integrates one existing external API; it does not build a new standalone public API, multiple unrelated integrations, undocumented APIs, scraping, payment integrations, major codebase restructuring, or a complete application. Please message me first if the workflow is unusual.
Starter covers up to 2 endpoints with API-key or bearer authentication. Standard adds up to 4 endpoints, validation, error handling, and one database-sync flow. Advanced can add OAuth or webhook processing with retries and idempotent event handling.
This service is a good fit for a documented CRM, calendar, email, notification, internal business, or other REST API. My experience includes Google Calendar OAuth, REST APIs, webhook event processing, database-backed workflows, and Node.js/NestJS integrations.
This project integrates one existing external API; it does not build a new standalone public API, multiple unrelated integrations, undocumented APIs, scraping, payment integrations, major codebase restructuring, or a complete application. Please message me first if the workflow is unusual.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$75
|
Standard
$175
|
Advanced
$325
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$25
API Documentation
(+ 1 Day)
+$50
Deployment Assistance
(+ 1 Day)
+$75Frequently asked questions
About Muhammad
Node.js Backend & API Integration Developer | NestJS, Stripe
Sheikhupura, Pakistan - 6:18 pm local time
I can help you with:
- REST API and backend feature development
- Third-party API integrations
- Webhook verification, event processing, retries, replay, and monitoring
- Stripe Checkout, subscriptions, and payment webhooks
- Authentication, authorization, and role-based access
- PostgreSQL and MongoDB database development
- Background jobs and scheduled processing with BullMQ
- Debugging, refactoring, and improving existing backends
Selected project work:
- Multi-timezone scheduling backend: Built a reusable NestJS scheduling backend with recurring availability, date overrides, timezone-aware slot generation, JWT authentication, PostgreSQL persistence, transactional overlap prevention, public booking endpoints, and Google Calendar OAuth.
- Webhook monitoring backend: Developed authentication, REST APIs, database design, event processing, latency tracking, webhook inspection, replay, and AWS deployment for a product used by development teams.
- Behavioral assessment backend: Built REST APIs for assessment flows, multidimensional scoring, personalized results, authentication, role-based access, admin workflows, PostgreSQL data models, and Stripe one-time payments for a client-commissioned MVP.
I also work with Next.js and React, so I can handle frontend touchpoints when a backend feature or integration needs them.
Share your current technology stack, the backend feature or API integration you need, and any relevant documentation. I’ll review the scope and explain how I would approach it.
Steps for completing your project
After purchasing the project, send requirements so Muhammad can start the project.
Delivery time starts when Muhammad receives requirements from you.
Muhammad works on your project following the steps below.
Revisions may occur after the delivery date.
Confirm API scope and access
Review the repository, API documentation, authentication method, endpoints, and expected data flow.
Map endpoints and build the integration
Implement authentication, requests, response mapping, validation, and error handling.