Portfolio

Case Studies

Real systems I've architected, organized by domain. Each study covers the problem, requirements, architecture, key decisions and trade-offs.

Crypto / Web3 Analytics

2 systems

Crypto / Web3 Analytics

Crypto Analytics & Token Transparency Platform

Institutional-grade token rating and on-chain analytics aggregating 8+ market-data providers behind a dual-database Laravel core.

PHP 8.2Laravel 11Passport (OAuth2)MongoDB 7.0

Crypto / Web3 Analytics

On-Chain Transaction Analytics & Red-Flag Detection

Event-driven serverless ETL that detects fraudulent and manipulative EVM tokens through a three-stage anomaly-to-ML classification pipeline with confidence scoring.

AWS Lambda (Python 3.11)EFS dependency preloadMongoDBAWS S3 (CSV + model artifacts)

Mobility & Booking

2 systems

Mobility & Booking

Campervan Rental Booking Engine

Multi-region campervan rental platform pairing a Symfony API with master-slave MySQL and an async payment queue for idempotent, retry-safe checkout at scale.

PHP 8.1Symfony 4.4FOS REST BundleJWT

Mobility & Booking

Multi-Venue Restaurant Reservation Platform

Multi-tenant reservation engine for independent venues, with per-venue database isolation, a custom availability engine and async guest communications on a Laravel 12 core.

PHP 8.2Laravel 12Eloquent ORMMySQL 8.0 (per-tenant)

E-commerce

1 system

E-commerce

Multi-Vendor E-Commerce Marketplace

CS-Cart marketplace where a single customer order splits into per-vendor child orders, commission is captured at split time, and vendor earnings settle through a Stripe Connect payout ledger.

PHPCS-Cart 4.x (multi-vendor)proprietary addon architectureMySQL 5.7 (InnoDB)

AdTech & CRM

1 system

AdTech & CRM

AdTech & CRM Platform

Multi-module Laravel platform for Vietnamese ad agencies that reconciles Facebook ad spend against bank debits, automates VN e-invoicing, and pushes real-time balance changes over WebSocket.

PHP 8.1Laravel 10Google OAuthMySQL 8.0 (dual connection)

AI & Automation

1 system

AI & Automation

AI Email Automation Platform

LLM-driven email triage for co-ownership property management — classifying maintenance requests and routing them to service providers through an async-first BullMQ pipeline with a two-stage confirmation audit trail.

NestJSTypeScriptTypeORMJWT + Passport

Smart City & IoT

1 system

Smart City & IoT

Smart City Data Platform

Municipal citizen-engagement platform aggregating waste, climate, warning and geo services from external civic APIs behind a modular Symfony core with Elasticsearch geo-search and reliable mobile push.

PHP 8.3Symfony 6.4API Platform 2.6Doctrine ORM 2.11

Logistics

1 system

Logistics

Cross-Border Logistics Platform

Production cross-border shipping platform for US–Vietnam parcels with a date-driven shipment workflow, async SMS/email notifications and compliance-grade audit trails on a monolithic Laravel core.

PHP 5.6+Laravel 5.6MySQLRedis (Predis)