You will get API Integration expert, Claude Codes, AI Development & Restful API Workflow
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Project details
Need two systems to actually talk to each other? That is what I do API integration for web apps, mobile apps, and e-commerce stores, so your data flows where it needs to go without manual copy-pasting or broken workflows.
What I work with:
REST APIs, JSON, OAuth, and third-party platforms like Stripe, Shopify, Twilio, and Salesforce plus custom/internal APIs.
What I handle:
• Single API hookups to pull data into your app
• Full integrations with authentication, data mapping & web hooks
• Automated syncing between multiple systems
• Proper error handling & retry logic (not an afterthought)
Where most integrations go wrong:
Half-finished docs, surprise rate limits, tokens expiring mid-project. I have hit all of it, so I test thoroughly before calling anything done.
Tech stacks I work with: → Node.js, PHP, Python, WordPress, React, MERN stack so we are probably compatible.
You'll get clean, documented code and clear communication throughout not just a working integration and silence after.
Not sure exactly what you need yet?
Send your API docs or just describe the problem, and I'll tell you honestly what it'll take.
What I work with:
REST APIs, JSON, OAuth, and third-party platforms like Stripe, Shopify, Twilio, and Salesforce plus custom/internal APIs.
What I handle:
• Single API hookups to pull data into your app
• Full integrations with authentication, data mapping & web hooks
• Automated syncing between multiple systems
• Proper error handling & retry logic (not an afterthought)
Where most integrations go wrong:
Half-finished docs, surprise rate limits, tokens expiring mid-project. I have hit all of it, so I test thoroughly before calling anything done.
Tech stacks I work with: → Node.js, PHP, Python, WordPress, React, MERN stack so we are probably compatible.
You'll get clean, documented code and clear communication throughout not just a working integration and silence after.
Not sure exactly what you need yet?
Send your API docs or just describe the problem, and I'll tell you honestly what it'll take.
Programming Languages
JavaScript, Python, JavaCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$129
|
Standard
$299
|
Advanced
$499
|
|---|---|---|---|
| Delivery Time | 1 day | 7 days | 15 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | |||
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$99
Design Customization
(+ 1 Day)
+$129
Responsive Design
(+ 1 Day)
+$99Frequently asked questions
42 reviews
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JH
Jordan H.
Nov 18, 2025
web app development cumulus
SE
Scott E.
Oct 9, 2025
Payoff of previous project, 50% of original total for the code already delivered
JA
Jinal A.
Sep 26, 2025
Full Stack Developer Needed for MERN Stack Website Development
Project was completed successfully in a short period.
JH
Jordan H.
Apr 11, 2025
cumulus landing page
great
MM
Mladen M.
Apr 11, 2025
Website to crm connection
About Manish
Full Stack Developer | React, Next.js, Node.js, TypeScript & WordPress
100%
Job Success
Chandigarh, India - 7:30 pm local time
Building software is only half the job. The other half is creating applications that are easy to maintain, easy to improve, and ready to scale as your business grows.
That's the mindset I bring to every project.
From MVPs to business-critical platforms, I've helped startups, agencies, and growing businesses build products that are meant to be used, maintained, and scaled not rebuilt.
Whether you need a custom web application, a SaaS platform, an internal business system, or a modern website, I can take ownership from planning to deployment while keeping communication clear, development predictable, and quality uncompromised.
Here's where I can help
✔ Custom Web Application Development
✔ SaaS Product Development
✔ React.js & Next.js Development
✔ Node.js & Express.js Backend Development
✔ MERN Stack Development
✔ REST API & Third-Party API Integrations
✔ Admin Dashboards & CRM Systems
✔ AI Integrations (OpenAI, Claude, Gemini)
✔ Authentication & User Management
✔ Payment Gateway Integration (Stripe, PayPal)
✔ MongoDB & PostgreSQL Database Design
✔ WordPress & WooCommerce Development
✔ Performance Optimization, Bug Fixes & Ongoing Maintenance
Why clients choose to work with me:
✔ 7,200+ hours worked on Upwork
✔ 70+ successful projects delivered
✔ Long-term partnerships with startups, agencies, and growing businesses
Technologies I Work With
Frontend: React.js, Next.js, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS, Bootstrap
Backend: Node.js, Express.js
Database: MongoDB, PostgreSQL, MySQL
Cloud & Tools: AWS, Docker, Git, Vercel
CMS: WordPress, WooCommerce
What it's like working with me
I don't measure success by the number of features delivered. I measure it by whether your product is easier to grow six months from now than it is today.
I ask questions, understand your business goals, and recommend solutions that save time, reduce future development costs, and improve the overall product. If there's a better approach than the original plan, I'll explain why before writing a single line of code.
You'll always know where the project stands, what I'm working on, and what's coming next. No disappearing. No vague updates. Just honest communication, clean code, and consistent progress.
My goal isn't to become another freelancer on your project.
It's to become the developer you can rely on whenever your product needs to evolve.
If you're looking for someone who combines technical expertise with a practical understanding of business goals, I'd love to hear about your project.
Let's build something that's fast, scalable, and ready for whatever comes next.
Steps for completing your project
After purchasing the project, send requirements so Manish can start the project.
Delivery time starts when Manish receives requirements from you.
Manish works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement analysis
Understand & review your API docs, tech stack, and integration goals
Setup & authentication
Configure API keys/OAuth and test connection