You will get API integration for your app, website, or workflow, clean & tested.
Top Rated
Top Rated
Project details
Most API integrations fail in production. Mine don't.
The difference is how you handle the things developers skip: auth token refresh, rate limit backoff, malformed response parsing, partial failures. I've integrated 50+ APIs across payments, AI, social, mapping, and communication and I've seen every failure mode.
WHY BUYERS ORDER THIS
Production-grade code
Any language / stack
Proper error handling
Fully documented
What you get: an integration that works in the real world, written in clean readable code, with a README that explains every piece. Your developer or future-you will thank me.
The Growth package covers 95% of integration projects up to 5 endpoints, full OAuth or JWT auth, error handling, and data displayed on your frontend. If you need Stripe, OpenAI, Google APIs, Meta, Twilio, or anything with a documented REST API: I've done it.
Not sure if your project fits? Message me with the API name and what you want it to do. I'll scope it in under an hour.
The difference is how you handle the things developers skip: auth token refresh, rate limit backoff, malformed response parsing, partial failures. I've integrated 50+ APIs across payments, AI, social, mapping, and communication and I've seen every failure mode.
WHY BUYERS ORDER THIS
Production-grade code
Any language / stack
Proper error handling
Fully documented
What you get: an integration that works in the real world, written in clean readable code, with a README that explains every piece. Your developer or future-you will thank me.
The Growth package covers 95% of integration projects up to 5 endpoints, full OAuth or JWT auth, error handling, and data displayed on your frontend. If you need Stripe, OpenAI, Google APIs, Meta, Twilio, or anything with a documented REST API: I've done it.
Not sure if your project fits? Message me with the API name and what you want it to do. I'll scope it in under an hour.
Programming Languages
JavaScript, TypeScript, GoCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$49
|
Standard
$119
|
Advanced
$249
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 4 days |
Number of Revisions | 1 | 3 | Unlimited |
Number of Pages | 0 | 1 | 2 |
Design Customization | |||
Content Upload | - | - | |
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Webhook listener setup
(+ 1 Day)
+$20
Postman collection
+$209Frequently asked questions
14 reviews
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JG
Joseph G.
Jul 3, 2026
Conversational AI Integration Specialist (AI Chatbot + AI Voice Assistant)
Great experience working with Kapil. I hired him to build an AI chatbot and voice receptionist integrating HubSpot, Squarespace, VAPI, and n8n for lead capture and routing. He owned the architecture end-to-end, delivered on time, and was fast and effective solving problems along the way. Would work with him again.
KA
Kartik A.
Mar 27, 2026
Experienced n8n Automation Specialist – Build & Optimize Workflows
Working with Kapil was a smooth experience. he picked up the requirements quickly, built the workflows exactly as needed, and made sure everything was well-documented. The project was delivered on time, and I really appreciated the clear communication and attention to detail. Definitely someone I’d work with again.
KA
Kartik A.
Feb 12, 2026
Senior Full-Stack & AI Solutions Engineer
Working with Kapil was a great experience. He combines deep technical expertise with a clear understanding of business impact, communicates proactively, and he met deadlines while delivering high-quality solutions. He’s reliable, professional, and a pleasure to work with, any client would benefit from his skills.
GG
Gourav G.
Jan 31, 2026
AI & Automation Specialist for Portfolio Data Tracking and Insights
Overall, very easy to work with and dependable. I’d be happy to work with Kapil again and would recommend him to anyone looking for solid AI or automation work.
JS
Jeff S.
Nov 14, 2025
Migrate Squarespace Website to Astro, MDX, Tailwind
About Kapil
AI Agents | LLM Systems | Automation | Ex-Twitter / Intercom
100%
Job Success
Dublin, Ireland - 5:28 am local time
If your system is slow, breaking under load, or full of manual workarounds, I fix it.
I build AI-driven and scalable systems that reduce downtime, automate workflows, and increase revenue. Over the past 10+ years, I’ve helped teams cut response times by 50%, scale to 100K+ concurrent users, and eliminate critical reliability issues, all without compromising performance.
I don’t just code; I solve real business problems and make your systems work under pressure.
What I Can Solve for You
If you’re facing:
Systems that fail under high load
Backend slowdowns or inconsistent performance
Manual workflows eating time and resources
AI or automation projects that aren’t production-ready
I can help you:
📊 Stabilize and scale your systems
⚙️ Automate workflows and reduce manual effort
🚀 Build AI-driven tools that actually perform in production
📈 Ensure reliability and measurable business impact
Proven Impact
✅ Intercom, Senior Product Engineer
Boosted customer engagement by 35% and reduced response times by 50% with scalable messaging and AI automation.
✅ Twitter, Tech Lead (Spaces)
Scaled real-time audio systems to 100K+ concurrent users with less than 1% downtime.
✅ Grab, Tech Lead (User Identity)
Rebuilt authentication systems, increasing reliability by 30% and reducing login failures by 60%.
✅ Condé Nast, Tech Lead (GQ, Vogue, Vanity Fair)
Modernized web platforms, improving performance by 40% and speeding up publishing by 50%.
What I Deliver
AI & automation systems that reduce manual work and boost efficiency
Scalable backend architectures built for high performance and reliability
Full product development from architecture to launch
Workflow automation and integrations (Stripe, Slack, Shopify, QuickBooks, Notion, CRMs, etc.)
Core Expertise
AI Agents & Automation: GPT, LangChain, n8n
Backend Systems: Node.js, Python, Microservices
Frontend: React, Next.js
Integrations: Stripe, Slack, Shopify, QuickBooks, Notion, CRMs
Why Clients Work With Me
✅ I focus on outcomes, not just code
✅ I solve root problems, not surface issues
✅ I build scalable, stable, production-ready systems
✅ I communicate clearly, provide fast feedback, and maintain full transparency
If you’re building something that needs to scale, automate, or perform under pressure, I can help you get there efficiently, reliably, and with measurable results.
Let’s connect and make it happen. 🙌
Steps for completing your project
After purchasing the project, send requirements so Kapil can start the project.
Delivery time starts when Kapil receives requirements from you.
Kapil works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Review & API Analysis
I review your API docs, access details, and integration goals. Clarify edge cases if needed.
Authentication Setup
Set up API authentication (API key, OAuth, or JWT) and test secure connection.