Justin Karsopawiro
Lead Engineer - Full Stack Architect
10+ years architecting scalable, high-performance web systems with deep expertise in modern frontend architecture, real-time data visualization, and performance-critical interfaces, building infrastructure that scales to millions of users with React, TypeScript, and Node.js.
Hey there! 👋
I'm a Lead Engineer with over 10+ years of experience architecting scalable, high-performance web systems. Deep expertise in modern frontend architecture, real-time data visualization, and performance-critical user interfaces.
Currently leading frontend architecture for a mortgage platform at BLINQX. Previously founded and led Webvork, my own consultancy, for eight years. Proven track record designing and owning complex systems end-to-end — from component design and state management to production optimization and developer-facing frameworks.
Proficient across the full stack of modern web technologies, with particular strength in React, TypeScript, Next.js, and Node.js — plus systems-level thinking, performance profiling, and build toolchain optimization.
Experience Highlights
Senior Software Engineer
Sept 2024 - PresentBLINQX / De Nationale Hypotheekbond
Founder
Jan 2018 - Jan 2026Webvork
Senior Software Engineer
Nov 2023 - Oct 2024Tradecast
Building products. Shipping apps.
From AI-powered SaaS tools to iOS apps on the App Store — see what I'm working on, or get in touch to build something together.
Education
NHL Hogeschool
Propedeuse, Computer Software Engineering
Aug 2021 - Jan 2022
Firda
MBO-4 Software Engineer, Computer Software Engineering
Sept 2018 - Jan 2021
Firda
Systems Engineer, Network and System Administration/Administrator
Aug 2013 - Jul 2014
Projects I've Worked On
10+
Years Experience
50+
Projects Delivered
30+
Technologies
20+
Happy Clients