You will get I Will Build and Integrate Custom APIs for Your Web Application
Rising Talent
Rising Talent
Project details
You will get a clean, secure, and well-documented API integration that connects your systems, automates data flow, and makes your applications work together seamlessly. With 5+ years of backend development experience, I build APIs that are reliable, scalable, and built to production standards.I've integrated REST APIs, webhooks, and third-party services across dozens of projects including payment gateways (Stripe, PayPal), CRM platforms (GHL), communication tools (Telegram, Slack), databases, and custom backend systems.I use AI tools like Claude Code and Cursor in my workflow which means faster development, cleaner code, and fewer bugs delivered to you.What makes this different: I don't just connect endpoints. I understand data flow, error handling, authentication, and security best practices so your integration works reliably in production, not just in testing.
š Portfolio: jonel-portfolio.vercel.app
š Portfolio: jonel-portfolio.vercel.app
Programming Languages
PHP, JavaScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$300
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 5 days | 7 days | 14 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.
Fast Delivery
+$50 - $120
Additional Revision
+$25Frequently asked questions
1 review
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LP
Lukas P.
Jul 3, 2025
NestJS service needs implementing periodical data fetching
Understood the problem clearly, and delivered what I needed, quickly without problems.
About John Neil
Full-Stack Developer | AI-Assisted Web Apps - Saas - API - Automation
Catanauan, PhilippinesĀ - 3:13 am local time
ā You need a custom web system ā I build it from scratch, clean and scalable
š You have an existing platform that needs new features ā I extend it without breaking what's already working
š Your tools don't talk to each other ā I connect them through automation and API integrations
š” You want to launch a SaaS product ā I help you go from idea to live product
āļø You're using GoHighLevel ā I set it up, customize it, and integrate it with your other systems
š³ You need to accept payments online ā I integrate Stripe, PayPal, or whatever gateway you use
š You need a website fast ā I build it on Webflow, Shopify, or custom code
š¤ You want AI-powered features ā I integrate LLMs, chatbots, and automation workflows into your product
The result?
ā±ļø Less manual work. š Systems that scale. ā A product your team can actually use.
š Tech & Tools:
Laravel Ā· NestJS Ā· Node.js Ā· Next.js Ā· PostgreSQL Ā· MySQL Ā· MongoDB Ā· Prisma Ā· AWS Ā· GitHub Actions Ā· Webflow Ā· Shopify Ā· GHL Ā· n8n Ā· Make(.)com Ā· Stripe Ā· Claude Code Ā· Cursor
Why work with me?
I use AI tools like Claude Code and Cursor daily ā not just for writing, but for building, debugging, refactoring, and shipping faster. I understand when AI output is wrong and I know how to fix it. You get a developer who works smarter and delivers more in less time.
I don't just write code ā I make sure I understand your business first. I communicate clearly, flag issues early, and treat your project like it's my own.
Portfolio & Live Projects:
š jonel-portfolio.vercel.app
š© Send me a message and let's make it happen.
Steps for completing your project
After purchasing the project, send requirements so John Neil can start the project.
Delivery time starts when John Neil receives requirements from you.
John Neil works on your project following the steps below.
Revisions may occur after the delivery date.
Review & Planning
Analyze API docs, map out data flow and integration architecture.
Development
Build the integration, set up authentication, data mapping, and error handling.