Wonsuk Choi
Hire

Work with me

I build full-stack web applications and internal tools for founders and businesses in markets where the software is still bad — healthcare, immigration, legal, real estate. Everything I build is designed to grow through search, not paid ads.

What I build

Web applicationsFull-stack Next.js + Supabase, from MVP to production. Built to rank through search from day one — not just demo well.
iOS & Android appsCross-platform apps in Flutter or React Native. Swift + Kotlin available on request. From consumer apps to tools that extend your web product.
Internal toolsCustom dashboards, CRMs, booking systems, admin panels. Replaces 3–5 SaaS subscriptions with something that fits your actual workflow.
Chrome extensionsLightweight browser tools, shipped end-to-end. Built Squish, a local image compressor with thousands of active users.

Who it's for

You're a good fit if you're a non-technical founder who needs a technical partner to build your product, or an existing business that needs custom tooling to replace manual processes — especially in a market where the software hasn't kept up.

How it works

1.We have a short call to understand your problem and whether I'm the right fit.
2.I send a written scope with timeline and cost estimate.
3.We build in milestones — working software at each stage, not just a finished product at the end.

Availability

Available for new projects

Start a conversation →

Detailed writeups

Directory Website →Marketplace →On-Demand Platform →Mobile App →SaaS Web App →E-Commerce →

Industry-specific builds

Legal Directory →Legal Marketplace →On-Demand Legal →Legal SaaS →Healthcare Directory →Healthcare Marketplace →On-Demand Healthcare →Healthcare SaaS →Beauty Directory →Beauty Marketplace →On-Demand Beauty →Beauty SaaS →Immigration Directory →Immigration Marketplace →On-Demand Immigration →Immigration SaaS →Real Estate Directory →Real Estate Marketplace →On-Demand Real Estate →Real Estate SaaS →Wellness Directory →Wellness Marketplace →On-Demand Wellness →Wellness SaaS →Local Services Directory →Local Services Marketplace →On-Demand Local Services →Local Services SaaS →Hospitality Directory →Hospitality Marketplace →On-Demand Hospitality →Hospitality SaaS →

What it costs

Directory Website →Marketplace →On-Demand Platform →Healthcare Platform →Immigration Platform →React Native App →Real Estate Platform →Wellness Platform →Local Services Platform →SaaS Web App →E-Commerce Platform →Hospitality Platform →

Guides

How to Migrate React to Next.js →