Full Stack Engineer • System Architect • Educator • Author

From Bangladesh to the global developer ecosystem

Hi, I’m Hasin Hayder — a Full Stack Engineer and System Architect with a strong background in building scalable web platforms, developer tools, and high-traffic WordPress products.

I work across the stack with PHP, JavaScript, Python, and Node.js, and I’m deeply interested in architecture, performance, and long-term maintainability. My work blends practical engineering, clean design, and real-world constraints.

I’m the co-founder of HappyMonster, where we built HappyAddons — one of the most widely used Elementor addon libraries with 400,000+ active installations worldwide.

Beyond building products, I actively teach, write, and mentor developers, focusing on helping them think better about code, systems, and trade-offs.

I’m a natural problem solver and enjoy finding creative solutions to real-world challenges. I love learning new technologies and applying them to practical problems, not just for the sake of it.

📌 Currently open to remote opportunities and impactful collaborations.

• Designing scalable, modular, and maintainable systems
• Monoliths, modular monoliths, and service-oriented architectures
• Clean abstractions, separation of concerns, and fault tolerance
• Practical architecture decisions over theoretical perfection

• End-to-end application development with performance in mind
• Backend-heavy systems with efficient frontend delivery
• Strong focus on developer experience and long-term sustainability

• Secure, well-documented REST APIs
• Authentication, authorization, rate limiting, and versioning
• Real-world API design driven by actual consumer needs

• Database optimization, caching strategies, and async processing
• Web security best practices across PHP, Node.js, and Python stacks
• Measurable performance improvements over premature optimization

• Large-scale WordPress plugin architecture
• Clean extensibility, backward compatibility, and upgrade safety
• Deep understanding of WordPress internals and ecosystem realities

• WordPress as a content engine, not just a theme system
• Headless setups using REST APIs
• Performance-focused CMS architectures

• 🎤 Speaker at Web & Data Summit 2024 and DevConf 2024
• 🧑‍💼 Lead Organizer — WordCamp Dhaka 2019
• 🧑‍💻 Program Team Member — WordCamp Dhaka 2025
• 🧠 Educator at Learn with Hasin Hayder
• 📰 Creator of Developers Treasure Chest — weekly curated developer insights
• 🧩 Building Eazy Plugin Manager — rethinking plugin management for WordPress
• 🚀 Working on PainlessWP — simplified managed WordPress hosting

Books authored:

• Object Oriented Programming with PHP
• WordPress Complete
• Facebook App Development
• Smarty

Teaching focus areas:

• PHP & Laravel internals
• JavaScript fundamentals and frameworks
• REST APIs & backend architecture
• WordPress plugin and security engineering
• System design for real-world applications

JavaScript · TypeScript · PHP · Python · SQL · Shell

Laravel · Vue.js · React · Alpine.js · Node.js · Express
Django · DRF · Flask · FastAPI · Livewire · Inertia.js · Bun

MySQL · MariaDB · PostgreSQL · SQLite · Redis · Valkey

HTML5 · CSS3 · Tailwind CSS · Bootstrap · Vite

Docker · Git · Nginx · GitHub Actions
Cloudflare · Netlify · Linux · macOS

• 🔗 LinkedIn: https://www.linkedin.com/in/thestoryteller/
• 🐦 Twitter/X: https://twitter.com/hasin
• ▶️ YouTube: https://www.youtube.com/@learnwithhasinhayder
• 🌍 Website: https://hasin.me
• 📩 Email: [email protected]

I believe great software comes from clear thinking, not more complexity.