Esteban Manalo Jr.
Lead Fullstack Developer
Fullstack developer building scalable web applications with modern JavaScript and cloud infrastructure
I'm a fullstack developer with over 10 years of experience building web applications across the entire stack. Currently leading development at DevsData LLC, I've spent my career working with JavaScript ecosystems, from React frontends to Node.js backends, while managing everything from databases to deployment pipelines.
My work focuses on creating systems that can handle real-world complexity - whether that's building background job processors, implementing rate limiting, or setting up automated deployments. I enjoy the problem-solving aspect of development and finding the right balance between performance, maintainability, and user experience.
A Redis-powered background job processing system with built-in retry logic and monitoring dashboard, designed to handle heavy workloads without blocking web application performance.
Express.js middleware that implements sliding window rate limiting with IP whitelisting to protect APIs from abuse while maintaining smooth user experience for legitimate traffic.
Docker-based automation tool for managing staging and production deployments with health checks and one-click rollback capabilities across AWS infrastructure.
WebSocket-powered dashboard that visualizes application metrics and user activity in real-time using Chart.js, built for teams that need instant visibility into their system performance.
Drag-and-drop form creation tool with conditional logic and validation rules, allowing non-technical users to build complex forms without writing code.