Full-Stack Developer Projects & Case Studies
I develop full-stack systems — PHP APIs, Node.js backend automation, Python scraping, and WooCommerce e-commerce platforms — combining clean code, speed, and long-term scalability. Review my detailed work below.
Node.js & Real-Time Systems
1. MegaWhales.io (Live Crypto Tracker)
Description: A high-availability system using Node.js and WebSockets for live crypto whale alerts. It monitors on-chain transfers and broadcasts instant, filtered alerts via Telegram.
- Developed WebSocket-based data pipelines with self-healing retry logic for continuous uptime.
- Implemented whale alert logic (> $500K) and comprehensive blockchain address label mapping.
- Backend management provided via an Admin Panel built with PHP + MySQL.
Example Node.js Code Snippet for real-time data fetching:
// whale-alert.js
import fetch from "node-fetch";
async function fetchRecent() {
const res = await fetch("https://api.trongrid.io/v1/transactions?limit=50");
const json = await res.json();
return json.data || [];
}
2. Secure Microservice for CRM Routing
Description: Developed a Node.js/Express serverless microservice hosted on AWS Lambda to process incoming form submissions, perform data validation, and route payloads to a CRM via a secure internal API.
Example Node.js/Express Snippet for JWT validation in a serverless function:
// lambda-handler.js
const jwt = require('jsonwebtoken');
function authenticateToken(req, res, next) {
const token = req.headers['authorization'];
if (!token) return res.status(401).send('Access Denied');
try {
const verified = jwt.verify(token.split(' ')[1], process.env.TOKEN_SECRET);
req.user = verified;
next();
} catch (err) {
res.status(403).send('Invalid Token');
}
}
// app.post('/data', authenticateToken, (req, res) => { ... });
3. Financial Data Aggregation & Normalization Engine
Description: Built a Node.js background worker to aggregate and normalize data from three different financial APIs (REST and SOAP), ensuring data consistency before storing in a PostgreSQL database for reporting.
Example Node.js Snippet for data normalization (standardizing keys):
// aggregator.js
function normalizeData(raw) {
// Maps various API fields to a single internal format
return {
eventTimestamp: raw.time || raw.event_ts,
// Standardize customer identifier
customerId: raw.user_id || raw.client_ref,
amountUSD: parseFloat(raw.price) * parseInt(raw.qty) || raw.total_amount
};
}
// Data normalization logic applied before DB insert...
Python Automation & Data Engineering
4. E-Commerce Competitor Stock Scraper
Description: A comprehensive Python tool using Scrapy and Puppeteer to monitor inventory and pricing across over 10 major competitor e-commerce sites, feeding normalized data back into the client’s internal dashboard.
- Implemented anti-detection measures and automated proxy management.
- Scheduled execution using Cron jobs on a Linux VPS.
Example Python Code Snippet for proxy rotation logic in a Scrapy crawler:
# middlewares.py - Scrapy middleware for proxy rotation
import random # Make sure to import random!
class ProxyMiddleware:
def process_request(self, request, spider):
# Rotate proxy list here
proxy_pool = ['http://proxy1:8080', 'http://proxy2:8080']
selected_proxy = random.choice(proxy_pool)
request.meta['proxy'] = selected_proxy
5. OCR Invoice & Document Processor
Description: Developed a Python script using libraries like PDFMiner and Tesseract OCR to automatically extract structured data from hundreds of unstructured invoices and receipts, significantly reducing manual data entry time.
Example Python Code Snippet for data extraction (using regex after OCR):
# pdf_processor.py
import re
# Assuming text has been extracted via OCR/PDFMiner
def extract_invoice_number(text_data):
# Searches for a pattern like INV-2025-001 or Invoice #1234
match = re.search(r'(INV|Invoice No|Ref)[\s#:]*(\d{4}[-]?\d+)', text_data, re.IGNORECASE)
return match.group(2) if match else None
6. Automated BI Reporting Backend
Description: Built a Python/Pandas backend for a large dataset, performing complex statistical analysis and generating weekly business intelligence reports automatically, delivered via email.
Example Python Code Snippet using Pandas for advanced grouping and pivot table:
# reporting_engine.py
import pandas as pd
def pivot_monthly_sales(df):
# Pivot table to show monthly sales by product category
df['timestamp'] = pd.to_datetime(df['timestamp'])
pivot = df.pivot_table(
index=df['timestamp'].dt.to_period('M'),
columns='category',
values='sales',
aggfunc='sum'
)
return pivot.fillna(0)
WordPress, E-Commerce & CMS (PHP)
7. Vaawaa.com (High-Speed News Aggregation)
Description: Custom news platform built on WordPress featuring optimized APIs, high-speed content delivery via caching layers, and extensive SEO-friendly architecture to handle high traffic volume.
- Implemented custom post types and taxonomies for optimal news organization.
- Optimized database queries and server-side logic for sub-1 second load times.
- Focused on schema markup and semantic HTML for superior search engine rankings.
Example PHP Snippet for custom post type registration (essential for structured content):
// vaawaa-theme/functions.php
function vaawaa_register_news_cpt() {
$labels = ['name' => 'News Articles', 'singular_name' => 'Article'];
$args = [
'labels' => $labels,
'public' => true,
'has_archive' => true,
'rewrite' => ['slug' => 'news'],
'supports' => ['title', 'editor', 'thumbnail', 'excerpt'],
];
register_post_type('news_article', $args);
}
add_action('init', 'vaawaa_register_news_cpt');
8. WooCommerce 3PL Logistics Connector
Description: Customized a WooCommerce installation to integrate with a unique third-party logistics (3PL) provider. Built a custom plugin to hook into WooCommerce order processing and synchronize inventory levels via a proprietary REST API.
Example PHP Snippet for WooCommerce API Integration via Order Hook:
// wc-custom-plugin.php
add_action('woocommerce_thankyou', 'send_order_to_3pl');
function send_order_to_3pl($order_id) {
$order = wc_get_order($order_id);
$data = [
'order_id' => $order->get_id(),
// Get shipping address for 3PL manifest
'shipping_address' => $order->get_address('shipping'),
'items' => array_values($order->get_items()) // Simplified item list
];
// POST request to 3rd party logistics provider (requires error handling)
wp_remote_post('https://3pl-api.com/ship', ['body' => json_encode($data)]);
}
9. Custom Subscription E-Commerce Platform
Description: Developed a full-featured subscription box service using WooCommerce Subscriptions, requiring custom payment gateway logic and a user dashboard for managing recurring orders and billing cycles.
Example PHP Snippet for checking active subscription status to protect content:
// subscription-logic.php
function restrict_premium_content() {
// Check if the current user has any active subscription to the premium content product
if ( is_user_logged_in() && !wcs_user_has_subscription( get_current_user_id(), 'active' ) ) {
// User is logged in but subscription is not active
if ( is_singular('premium_content') ) {
wp_redirect( home_url('/membership-required/') );
exit;
}
}
}
add_action('template_redirect', 'restrict_premium_content');
Blockchain & Dedicated API
10. Private Network Blockchain Explorer
Description: Developed a partial Blockchain Explorer for a private network. The backend (PHP) indexed transaction data from the blockchain node, and the frontend (Vanilla JS) displayed real-time transaction and block details.
- Implemented robust API communication with the blockchain node (JSON-RPC).
- Optimized MySQL database for quick lookups of large transaction history.
Example PHP Snippet for JSON-RPC call to fetch transaction data:
// rpc_connector.php
function get_transaction_details($node_url, $tx_hash) {
$payload = json_encode([
'jsonrpc' => '2.0',
'id' => 1,
'method' => 'eth_getTransactionByHash',
'params' => [$tx_hash]
]);
$ch = curl_init($node_url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
// Return the result object from the RPC response
return json_decode($response)->result ?? null;
}
Professional SEO & Performance Optimization
A successful website requires technical excellence and visibility. I offer a comprehensive SEO strategy to ensure your site is ranked effectively on search engines like Google.
- Technical SEO Audit: Full review of site structure, speed, mobile usability, and indexability.
- Schema Markup Implementation: Adding JSON-LD to qualify your content for rich snippets (e.g., FAQ, Product, Recipe).
- Performance Optimization: Aggressive caching, minification, and server-side tuning to achieve top Google PageSpeed scores.
- Canonicalization & Hreflang: Correct implementation to solve duplicate content issues and target global audiences.
Example JSON-LD Schema Snippet for an FAQ (Structured Data) to boost organic visibility:
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "FAQPage",
"mainEntity": [{
"@type": "Question",
"name": "Which payment methods do you accept?",
"acceptedAnswer": {
"@type": "Answer",
"text": "I accept payments via Payoneer and USDT (TRC-20)."
}
}]
}
</script>