You will get API Development & Integrations | REST, GraphQL, Stripe, Twilio, and More
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Project details
Need a reliable API built or integrated into your platform? I design and develop secure, scalable APIs and connect third-party services (Stripe, Twilio, HubSpot, Slack, Google APIs, etc.) into your apps.
Whether you need a custom REST/GraphQL API, payment gateway, CRM integration, or microservice architecture, I deliver production-ready solutions using Node.js, Python, FastAPI, Express, PostgreSQL, and AWS/GCP.
What you get:
• Custom REST or GraphQL API design
• Secure authentication (OAuth2, JWT)
• Third-party service integrations (Stripe, PayPal, Twilio, Slack, Google APIs)
• Database integration (PostgreSQL, MySQL, MongoDB)
• Deployment to AWS, GCP, or Vercel/Netlify
Whether you need a custom REST/GraphQL API, payment gateway, CRM integration, or microservice architecture, I deliver production-ready solutions using Node.js, Python, FastAPI, Express, PostgreSQL, and AWS/GCP.
What you get:
• Custom REST or GraphQL API design
• Secure authentication (OAuth2, JWT)
• Third-party service integrations (Stripe, PayPal, Twilio, Slack, Google APIs)
• Database integration (PostgreSQL, MySQL, MongoDB)
• Deployment to AWS, GCP, or Vercel/Netlify
Programming Languages
PHP, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$199
|
Standard
$499
|
Advanced
$999
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 2 | 5 | 10 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$399 - $1,699
Additional Revision
+$150
Additional Page
(+ 2 Days)
+$150
Content Upload
(+ 2 Days)
+$200Frequently asked questions
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About Chaudhry
Senior Backend & AI Systems Engineer | Full Stack, Node.js, Python
100%
Job Success
Islamabad, Pakistan - 5:53 pm local time
I build production grade SaaS platforms, AI systems, realtime applications, high concurrency backend infrastructure, and full stack mobile and web platforms.
Most developers today can generate code with AI tools. Very few can architect systems that remain scalable, maintainable, and reliable once real users, payments, concurrency, and operational complexity enter the picture.
That’s where I work best.
My background is deeply rooted in backend engineering, distributed systems, and full stack architecture. AI has simply become another layer in the systems I design, not a replacement for engineering fundamentals. I work with startups and growing businesses that need more than just MVP development. They need stable foundations that can scale properly over time.
I specialize in building:
* Multi tenant SaaS platforms
* AI orchestration and agentic workflows
* Operational AI systems integrated into real business workflows
* High concurrency backend infrastructure
* Payment and subscription systems
* Realtime dashboards and event driven systems
* Queue based architectures and worker orchestration
* Telephony and communication platforms
* Customer engagement and loyalty systems
* Workflow automation platforms
* RBAC and enterprise permission systems
* QR based tracking and attendance systems
* API platforms and microservices architecture
My AI experience goes beyond simple chatbot integrations and includes:
* RAG pipelines and retrieval systems
* Agentic workflows and AI orchestration
* Tool execution pipelines
* AI voice calling systems
* Operational AI agents
* Document intelligence and OCR pipelines
* Permission aware retrieval systems
* AI powered workflow automation
* AI integrated backend infrastructure
My primary stack includes:
* Node.js, TypeScript, Python, PHP
* React, Next.js, Angular
* React Native, Expo, Flutter
* FastAPI, Tornado, Django, Flask, Express, NestJS, Laravel, Symfony
* PostgreSQL, MySQL, Redis, Supabase, MongoDB, DynamoDB
* Docker, Kubernetes, AWS, GCP
* OpenAI, Claude, LangChain, pgvector
* Websockets, SSE, realtime systems
* CI/CD pipelines and cloud native deployments
* Large scale data extraction using Selenium, PlayWright, Requests, HTTPx, Requests
* AI Chatbots, Slack bot, Telegram bot, Discord bot
I regularly work with:
* Queue systems and distributed workers
* Event driven architectures
* Payment infrastructure including Stripe
* Backend optimization and scaling
* Transactional consistency and idempotency
* Observability, monitoring, and debugging
* Realtime synchronization systems
* Serverless and microservices environments
Most of my engineering foundation was built long before the current AI wave, with a strong focus on backend systems, scalability, distributed infrastructure, and software architecture.
I care heavily about:
* Clean architecture
* Performance under load
* Execution reliability
* Long term maintainability
* Scalability and operational stability
* Backend observability and debugging
* Cost efficient infrastructure design
* Transactional integrity and failure handling
I don’t just build features. I help architect systems correctly so they survive real growth.
If you’re building a serious product and need an engineer who can own complex technical problems independently, I’d be happy to discuss your project.
Steps for completing your project
After purchasing the project, send requirements so Chaudhry can start the project.
Delivery time starts when Chaudhry receives requirements from you.
Chaudhry works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis
Gather use cases, confirm endpoints, integrations, and security needs.
Development
Build endpoints, logic, and connect databases/APIs.