Hi, I'm JOHN
A decade of shipping production systems.
I'm a full-stack software engineer with 10+ years of experience building scalable web, mobile, and AI-powered applications - from small platforms to enterprise systems.
I'm John Alcantara.
A quick hello in 7 seconds.
Tap the speaker icon to hear me out — or just scroll on. Either way, I've spent the last decade turning complex problems into products people actually enjoy using.
SaaS & Web Platforms
Built scalable web applications with complex workflows, user management, and production-ready architectures.
AI-Enabled Systems
Integrated AI services for real-time processing, structured outputs, and intelligent user experiences.
Frontend Engineering
Developed modern, component-driven interfaces with focus on performance, usability, and maintainability.
Real-time Applications
Engineered systems with live updates, streaming data, and responsive user interactions.
Scalable Architecture
Designed modular systems using microservices, shared modules, and scalable infrastructure patterns.
Reliability & Security
Built production-ready systems with strong data handling, access control, and robust testing practices.
A stack tuned for speed & scale.
I pick the right tool for the job - from real-time systems to AI-first products.
Front-End
11 itemsBackend
12 itemsDatabase
6 itemsCloud & DevOps
7 itemsSome of my projects.
Enterprise kiosks, interactive retail walls, and consumer platforms across PLDT, Smart, Yamaha, and the Villar Group.
The Full Journey
Ever wonder how software actually gets built?
An immersive, scroll-driven experience through the complete software development lifecycle — from the first spark of an idea to a living product in the wild.
A 12-year timeline.
From enterprise to startup, I've led and shipped across the stack.
Software Engineer
- — Designed and developed scalable healthcare platforms at Oqea Pty Ltd, including telehealth systems, diagnostic tools, and practice management solutions used in real-world clinical workflows.
- — Implemented microservices using modern stacks, leveraging monorepo setups, module federation, and cloud-native services for performance and scalability.
- — Built advanced features such as real-time video consultations, live transcription with AI-powered summaries, and complex reporting pipelines integrating multiple data sources.
Web/Mobile Developer
- — Delivered end-to-end freelance solutions for enterprise clients including Yamaha Motor Philippines, Lumina Homes, Villar Group, etc. building custom systems tailored to business needs.
Full Stack Developer
- — Customized and extended the CRM platform Perfex CRM at Ad-Lib.io, enhancing core modules such as client management, sales pipelines, and reporting to support business-specific workflows.
- — Developed full-stack features using PHP, JavaScript, and MySQL, including custom modules, API integrations, and UI improvements to streamline internal operations and improve user experience.
- — Optimized system performance and maintainability by refactoring legacy code, improving database queries, and implementing scalable solutions aligned with evolving CRM requirements.
Full Stack Developer
- — Developed interactive kiosk systems at Optima Digital, including PLDT InfoTouch and Smart Product Wall, delivering engaging digital experiences for telecom and retail environments.
- — Built and maintained multiple full-stack web applications and marketing websites using PHP, JavaScript, and MySQL, supporting both internal tools and client-facing platforms.
- — Engineered experiential marketing solutions by integrating hardware (touchscreens, kiosks) with custom software, enabling immersive and data-driven customer interactions across events and physical locations.
Let's build something immersive and thoughtfully crafted.
Open to full-stack, architecture, and AI-heavy product roles.