You will get Full Stack API Developer for Custom API Development & Integration
Rising Talent
Rising Talent
Project details
You will get secure, scalable, and production-ready APIs built by a Senior Full-Stack Developer with 7+ years of experience in API Development, API Integration, Node.js, Python, and backend architecture.
I help startups, SaaS companies, and growing businesses build custom APIs, third-party integrations, SaaS backends, authentication systems, payment integrations, and AI-powered backends. Whether you need a new API, existing backend improved, or complete SaaS infrastructure, I’ll deliver a reliable solution tailored to your requirements.
What you'll get:
✓ Custom API Development
✓ API Integration & Third-Party Services
✓ REST API & GraphQL Development
✓ Node.js, NestJS & Python Development
✓ SaaS Backend Development
✓ Authentication & Authorization APIs
✓ Payment & Webhook APIs
✓ PostgreSQL, MongoDB & MySQL Integration
✓ OpenAI & Claude API Integration
✓ AI Chatbot & AI Agent APIs
✓ Secure Validation & Error Handling
✓ API Documentation (Swagger/OpenAPI)
✓ Clean, Scalable Source Code
✓ Deployment Support
Every API is built with a focus on security, performance, scalability, maintainability, and long-term business growth.
I help startups, SaaS companies, and growing businesses build custom APIs, third-party integrations, SaaS backends, authentication systems, payment integrations, and AI-powered backends. Whether you need a new API, existing backend improved, or complete SaaS infrastructure, I’ll deliver a reliable solution tailored to your requirements.
What you'll get:
✓ Custom API Development
✓ API Integration & Third-Party Services
✓ REST API & GraphQL Development
✓ Node.js, NestJS & Python Development
✓ SaaS Backend Development
✓ Authentication & Authorization APIs
✓ Payment & Webhook APIs
✓ PostgreSQL, MongoDB & MySQL Integration
✓ OpenAI & Claude API Integration
✓ AI Chatbot & AI Agent APIs
✓ Secure Validation & Error Handling
✓ API Documentation (Swagger/OpenAPI)
✓ Clean, Scalable Source Code
✓ Deployment Support
Every API is built with a focus on security, performance, scalability, maintainability, and long-term business growth.
Programming Languages
PHP, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$149
|
Standard
$299
|
Advanced
$499
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional API Endpoints
(+ 1 Day)
+$50
Third-Party API Integration
(+ 1 Day)
+$75
API Documentation
(+ 1 Day)
+$50Frequently asked questions
About Saqlain
Full Stack Developer | React, Next.js, Node.js, Python | SaaS & AI
Okara, Pakistan - 5:57 am local time
You need software that works reliably today, can handle real users tomorrow, and doesn't become a technical problem every time your business grows.
I'm a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 7+ years of experience helping startups, founders, and growing businesses turn ideas, MVPs, and existing applications into scalable, production-ready software.
You get one developer who can own the complete build, from product architecture and React / Next.js frontend to Node.js / Python backend, databases, APIs, cloud infrastructure, integrations, and AI.
𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗚𝗲𝘁
✦ A scalable SaaS product built for real users and future growth
✦ A startup MVP taken from idea to production without unnecessary complexity
✦ Fast, responsive React and Next.js applications
✦ Reliable Node.js and Python backends with clean business logic
✦ Secure APIs, databases, authentication, payments, and third-party integrations
✦ AI features connected to your actual product and business workflows
✦ Existing applications modernized without breaking what already works
✦ Clean architecture that makes future development easier and more predictable
𝗪𝗵𝗮𝘁 𝗜 𝗛𝗲𝗹𝗽 𝗙𝗶𝘅
✦ Slow applications and performance bottlenecks
✦ MVPs that are difficult to scale
✦ Weak or outdated architecture
✦ Messy codebases and technical debt
✦ Broken APIs and third-party integrations
✦ Database and backend performance issues
✦ AI features that stop at the demo stage
✦ Unfinished applications that need experienced ownership
✦ Manual business processes that can be replaced with automation
𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱
✦ SaaS platforms and multi-tenant applications
✦ Startup MVPs and new digital products
✦ Custom web applications
✦ AI-powered applications and AI agents
✦ Internal tools and business automation
✦ CRM, ERP, marketplace, and customer platforms
✦ Real-time dashboards and business systems
✦ REST and GraphQL APIs
✦ Payment and third-party integrations
✦ Enterprise and custom business software
𝗔𝗜 𝗔𝗻𝗱 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻
AI should solve a real problem inside your product, not just exist as a feature.
I build:
✦ OpenAI and Claude integrations
✦ AI agents and intelligent assistants
✦ RAG and knowledge-based AI systems
✦ LLM-powered product features
✦ AI workflow automation
✦ AI-powered recommendations and business workflows
✦ Document and data processing systems
𝗖𝗼𝗿𝗲 𝗦𝘁𝗮𝗰𝗸
✦ Frontend: React, Next.js, TypeScript, JavaScript, Tailwind CSS
✦ Backend: Node.js, NestJS, Express.js, Python, PHP, Laravel
✦ Database: PostgreSQL, MongoDB, MySQL, Redis, Supabase
✦ Cloud & DevOps: AWS, Docker, CI/CD, Vercel, GitHub Actions
✦ AI: OpenAI, Claude, LLM Integrations, AI Agents, RAG, AI Automation
✦ Integrations: REST APIs, GraphQL, Stripe, Webhooks, Authentication, Maps, Third-Party APIs
𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲
You don't just need someone who can write code. You need someone who understands how the pieces fit together and can take responsibility for the product as a whole.
My experience spans SaaS, healthcare, logistics, procurement, mobility, eCommerce, and custom business software, including products with complex workflows, real-time systems, secure data, third-party integrations, and production infrastructure.
I focus on understanding the business requirement first, identifying technical risks early, choosing the right architecture, and building software that remains maintainable as the product evolves.
𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸
Scope first. Architecture second. Production delivery third.
You get clear communication, regular progress updates, practical technical decisions, clean code, and ownership across the full development lifecycle.
𝗟𝗲𝘁'𝘀 𝗕𝘂𝗶𝗹𝗱
Have an MVP to launch, an existing product to improve, or an idea that needs to become production-ready?
Send me the details. Let's turn it into reliable software that works today and scales with your business tomorrow.
Steps for completing your project
After purchasing the project, send requirements so Saqlain can start the project.
Delivery time starts when Saqlain receives requirements from you.
Saqlain works on your project following the steps below.
Revisions may occur after the delivery date.
Review Requirements
I'll review your requirements, existing system, API documentation, and integrations to understand the scope and define the right implementation approach.
Plan API Architecture
I'll design the API structure, endpoints, data flow, authentication, validation, error handling, and database requirements before development begins.