dub
America's first regulated copy trading platform — automatically replicate trades from top investors, funds, and politicians.
2M+ DOWNLOADS
FlutterC#
ENGINEER · ARCHITECT · BUILDER
Joshua de Guzman
Software engineer crafting products at the intersection of design, code, and AI. I spend my time scaling consumer products in heavily-regulated industries and operationalizing agents to help engineers focus on building, and workflows that help run the business.
NowSenior Engineer, dub
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Building inFinTech, AI, Startups
Select Projects
Building with AI, shipping for years at startups and at scale.
Plus automation & internal tools and agentic systems that help improve developer experience for teams and quietly save businesses thousands of dollars, respectively.
Wayflight
Live flight tracking on iOS and Android, integrated with pilot-grade data and flight alerts.
10K+ DOWNLOADS
FlutterGCP
Lume
Private wealth tracking powered by local, open-source LLMs — your accounts and holdings analyzed entirely on-device.
PRIVATE AI
AILLMsmacOS
Freelancer.com
World's largest freelance marketplaces with over 50 million users.
5M+ DOWNLOADS
AndroidiOS
Freightlancer
Australia's leading heavy-haulage marketplace, now known as Loadshift.
AU's #1 HEAVY-HAULAGE
AndroidiOS
Better - YC W22
Built a neobank with embedded insurance. Backed by YC, Slow Ventures, and Soma Capital.
10K+ USERS
FlutterJavaScript
Habitcue
Habit tracking that treats you like an adult. Cues, not streaks. Intentions, not guilt.
Shipped in 1 week
SwiftSwiftDataSwiftUI
KeepAuto
Car maintenance without the paper glove box — track service, get reminders, and keep receipts that survive resale.
#2 iOS App Store
SwiftiOSmacOS
That's the short list — experiments, case studies, and things I shipped beyond this page.
Start a conversation →Recent Writing
Select companies
Better - YC W22
FREIGHTLANCER
Better - YC W22
FREIGHTLANCER
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Better - YC W22
FREIGHTLANCER