David J. Mack

Background

About David J. Mack

I'm a front-end developer who's been building web applications for 16+ years. Companies hire me when they need someone who just gets things done - no surprises, no excuses. What 16 years of experience actually means: I spot potential issues before they become problems. I write code that other developers can easily maintain. I deliver on deadlines because I've learned to plan for the unexpected. I work with React components and modern JavaScript, focusing on clean state management and component composition. At Amwell, I built React components for Optimizely CMS that powered their corporate, patient, and provider websites, enabling content teams to maintain consistent experiences across platforms. My experience includes scaling platforms through 300% growth, supporting IPO launches, and delivering secure systems under tight deadlines. Recent contract work includes building investor portals for Series A startups and providing technical consultation for biotech laboratory systems: Delivered secure investor portal for Series A startup in 14 days when initial approach proved problematic Scaled healthcare platform UI to support 300% provider growth during COVID without downtime Built reusable React components that eliminated engineering bottlenecks for content teams Learned C#/.NET in weeks to unify three company websites during critical growth phase : Building web applications that work reliably under pressure. Whether I'm building React interfaces for enterprise applications or developing personal web projects, I'm energized by turning complex requirements into clean, functional solutions.': Roles where I can focus on building quality frontend applications. Teams that value experience, reliability, and the kind of problem-solving that comes from 16+ years of seeing what works and what breaks. I excel in independent work environments with clear objectives and minimal meetings. I combine proven delivery with genuine enthusiasm for modern frontend development.