Blog

A battle-tested, step-by-step production deployment guide for the Java 21 Spring Boot 3 & React 19 E-Learning platform on a single Ubuntu VPS: Docker Compose production topology, Host Nginx SSL termination with Certbot, Swap memory tuning, WebSocket proxying, automated daily database backups, and zero-downtime redeployment scripts.

A deep-dive technical post-mortem on hardening the open-source Java 21 Spring Boot 3.4 & React 19 E-Learning platform: eliminating path traversal in file storage, implementing refresh token rotation with Axios queue interceptors, Docker persistent volumes, and Actuator health probes.

A comprehensive guide on rebuilding a monolithic Laravel E-Learning & CBT platform into a high-concurrency, cloud-ready architecture using Ruby 3.3, Ruby on Rails 8.1 API, React 19, Tailwind CSS v4, PostgreSQL 16, Redis 7, and Action Cable real-time proctoring.

Deploy a high-concurrency Python FastAPI and React 19 application to a single Linux VPS: multi-container Docker Compose orchestration, Host Nginx reverse proxy with Let's Encrypt SSL, WebSocket upgrade tuning, and auto-recovery health monitoring scripts.

Master bulk data ingestion and automated quality assurance in Python FastAPI: memory-efficient Excel streaming with openpyxl, atomic batch database transactions, async integration testing with pytest-asyncio and httpx, and GitHub Actions CI/CD pipelines.

Fortify enterprise Python FastAPI backends: declarative Role-Based Access Control (RBAC) via dependency injection, path traversal defense in file uploads, and a seamless 1-Click Administrative Impersonation engine with zero-reauth session recovery.

Ace system design interviews with complete end-to-end architectures: TinyURL URL shortener, WhatsApp-scale real-time chat, Zomato/Gojek geospatial food delivery, distributed notification engines, and Redis rate limiters.

Deep-dive into distributed systems theory and production patterns: CAP and PACELC theorems, consistent hashing rings, horizontal database sharding, idempotent APIs, Transactional Outbox, Saga orchestration, and CQRS.

Essential building blocks of scalable architectures: L4 vs L7 load balancing, global CDN caching, Redis caching strategies, API Gateways, SQL vs NoSQL selection matrices, and Apache Kafka event-driven decoupling.

Master foundational networking concepts for system design: how the internet routes packets, TCP vs UDP trade-offs, HTTP/HTTPS security with TLS 1.3, DNS resolution deep-dive, and stateless REST API architectural principles.

Engineer a high-concurrency, cheat-resistant Computer Based Test (CBT) engine using Python FastAPI: server-authoritative countdown timers, instant autosave, anti-cheat violation traps, and real-time candidate proctoring with native ASGI WebSockets and Redis Pub/Sub.

Master modern async database persistence and schema validation in Python 3.12: SQLAlchemy 2.0 Async engine, eliminating N+1 query traps with selectinload, avoiding MissingGreenlet errors with expire_on_commit=False, and sub-millisecond serialization using Pydantic v2.

A comprehensive guide on rebuilding a monolithic Laravel E-Learning & CBT platform into a high-concurrency, cloud-ready architecture using Java 21, Spring Boot 3.4, React 19, Tailwind CSS v4, Redis, and WebSocket STOMP proctoring.

A comprehensive guide on rebuilding a monolithic Laravel E-Learning & CBT platform into a high-concurrency, cloud-ready async architecture using Python 3.12, FastAPI, SQLAlchemy 2.0 Async, Pydantic v2, React 19, Tailwind CSS v4, Redis, and native WebSocket proctoring.

Part 10 of the Laravel E-Learning series: deep-diving into Insecure Direct Object Reference (IDOR) vulnerabilities, implementing granular Laravel Policies, securing Livewire components with #[Locked], hiding exam answers, and hardening admin impersonation in PR #18.

Part 9 of the Laravel E-Learning series: triaging a critical community bug report (Issue #16), fixing essay score calculations, student attempt validation, UI state handling, and adding a comprehensive GitHub Actions CI & Security pipeline in PR #17.

Complete DevSecOps pipeline with GitHub Actions. Security scanning, Docker, CI/CD, monitoring, and production deployment for enterprise applications.

Transform a monolith into microservices. Service boundaries, inter-service communication, API gateway, saga pattern, and when NOT to use microservices.

Apply SOLID principles and design patterns in real code. Refactor bad code to clean code with practical examples in NestJS and Laravel.

Master polyglot database architecture. PostgreSQL for telemetry, MySQL for business data, Redis for caching. Schema design, migrations, and query optimization.

Build a powerful admin panel with Laravel and Filament. Service layer patterns, Eloquent ORM, event-driven architecture, and when Laravel beats Node.js.

Build a scalable backend API with NestJS and TypeScript. Modules, controllers, services, DTOs, dependency injection, and clean architecture patterns.

Step-by-step guide to building a real-time fleet tracking dashboard with Next.js and TypeScript. SSR, component architecture, and performance optimization.

Learn how to design enterprise system architecture for an energy logistics fleet management platform. From requirements gathering to tech stack decisions with NestJS, Laravel, and Next.js.

A complete guide to upgrading the Laravel E-Learning & CBT Platform from Laravel 12 to Laravel 13, covering PHP 8.3, dependency updates, breaking changes, and deployment.

Complete guide to deploying our Laravel e-learning platform to production using Ubuntu VPS, NGINX, MySQL, and automated deployment with GitHub Actions.

Implementing comprehensive testing for our e-learning platform using Pest PHP, covering unit tests, feature tests, and browser testing.

Adding real-time functionality to our e-learning platform using Livewire for live exam monitoring, instant notifications, and dynamic updates.

Creating a complete exam system with Filament resources for managing exams, questions, and implementing the student exam-taking experience.

Implementing role-based authentication with Admin, Teacher, and Student roles using Spatie Permission and Filament's multi-panel setup.

Designing a robust database schema for an e-learning platform with users, subjects, exams, questions, and results using Laravel migrations.

Step-by-step guide to setting up a fresh Laravel 12 project with Filament 3 for building a modern e-learning admin panel.

The story of upgrading a legacy Laravel 5.2 e-learning platform to modern Laravel with Filament, Livewire, and best practices. Plus, a sneak peek at the upcoming tutorial series.

Finishing touches pada UI, error handling, build APK untuk testing, build AAB untuk Play Store, dan panduan publikasi aplikasi.

Implementasi QR scanner untuk check-in peserta event menggunakan expo-camera, parsing QR data, record attendance via API, dan feedback animasi.

Menampilkan daftar event dengan pull-to-refresh, membuat komponen EventCard, halaman detail event, dan daftar peserta terdaftar.

Implementasi sistem login admin dengan form validation, state management Zustand, token storage SecureStore, dan protected routes.

Membuat project Expo baru dengan TypeScript, install dependencies, konfigurasi NativeWind, dan setup struktur folder untuk aplikasi event management.

Panduan lengkap instalasi environment development React Native Expo di Mac, Windows, dan Ubuntu. Setup Node.js, VS Code, Expo CLI, dan emulator.

Mengenal arsitektur sistem aplikasi event management dengan React Native Expo untuk scan QR kehadiran peserta. Memahami tech stack dan flow diagram aplikasi.

How I built a comprehensive event management system with registration, waiting lists, QR code tickets, and automated emails for LampungDev - a developer community in Indonesia.

A practical guide on deploying Next.js applications to a VPS without Docker. Learn why sometimes the old-school approach is the better choice for small to medium projects.