Available for new projects · Seoul (KST)

I ship AI products past the demo stage.

Freelance developer for Replicate and fal.ai builds, production refactors, and MVPs that actually launch.

Selected work

One live product, one in development.

Live in production

AI short-form video generation service. Prompt to finished short, with the render pipeline and delivery handled end to end.

Launching soon

AI still-image ad creative studio. Product photos in, scroll-stopping ad stills out, tuned for paid social.

The work between a working demo and a product that earns.

Your vibe-coded app works until it doesn't. I review AI-generated code, fix what's broken, and refactor it into a codebase you can maintain.

Starting at $400

Code review · Refactoring · Bug fixes

Video and image generation with Replicate and fal.ai. Queues, webhooks, caching, and cost control, wired correctly from day one.

Replicate · fal.ai · Webhooks

Auth, billing, and subscriptions. The unglamorous work AI tools fumble, done carefully so you actually get paid.

Auth · Billing · Edge cases

From idea to launched product. We scope it on an intro call first, then you get a fixed quote. No hourly fog.

Fixed quote after intro call

I'm Jaeho Lee, a freelance developer in Seoul. I spent two years as a developer at AutoCrypt, then went independent to build AI products full time.

My work lives where AI demos meet production reality: media pipelines, billing, and code that survives contact with real users.

NowIndependent freelance developerAI products, media pipelines, and MVPs. Operating ShortReal AI.
2021 to 2023Developer, AutoCryptAndroid and web development.
2018 to 2025B.S. Computer Engineering, Gachon University

Short process, fixed price, no surprises.

01Intro callYou describe the idea, I ask hard questions. Thirty minutes, free, no pitch deck required.
02Fixed quoteScope, timeline, and one price in writing. If the fit is wrong, I will tell you on the call.
03Build and handoffWeekly demos from a clean repo. Docs included. You own all of it when we ship.

Send one paragraph about what you're making. I reply within two business days.