Mr. Latte
A Freelance Software Development Expert Who Plans and Ships Products
- Since 2002Building products
- Since 2005Writing tech
- Since 2008Running this site
- 11Own products shipped
- 80+Client projects
- 4Patents · Papers
Now
Still shipping and iterating. I run 11 services in parallel and keep refining each one’s user flow and operations.
- Services in operation: See all 11
- Recent activity: Blog · Research
- Work with me: Work With Me · Contact
I’m a Seoul-based freelance software development expert who works across planning, development, and launch. Founders, teams, and businesses can hire me for product work. I do more than implement features: I define the problem, narrow the MVP, design the user flow, and take the product through build and launch.
Since 2002, I have worked across web, mobile, and cloud products for startups, established companies, and my own self-initiated services. I also keep up closely with new technology shifts and have practical experience applying AI to product features, automation, and development workflows. I am intentionally repositioning my work around a clearer identity: a freelance software development expert who can also frame the problem, define the MVP, and carry the product into launch.
What I Do
- Problem framing and MVP scoping - Turn early ideas into a concrete product boundary and a realistic first release.
- User flow and information architecture - Clarify where users enter, decide, convert, and return.
- Full-stack implementation and launch - Build across frontend, backend, infrastructure, and operations.
- Technology trend and AI application review - Evaluate where new technology or AI actually creates product value instead of noise.
- Product and engineering reviews - Identify bottlenecks in structure, execution, and technical decision-making.
See the offer structure on Work With Me or start a conversation on Contact.
Built Products
Products I planned and shipped myself. Most of them I still run today.
- InverseOne - Each day a deterministic board of KR/US stocks is laid out; you open tiles to discover today's stocks while avoiding the traps. Every find opens the stock's details, and a streak builds as you keep discovering. Not day-trading or gambling — just one playful round a day to widen your view.
- Reputo - A multilingual career exploration site that converts vague job names into real-person growth paths, ordered preparation steps, and honest reality. Content production runs on an AI pipeline.
- StartupXO - One search bar to explore ideas, news, and talent simultaneously. AI generates fresh ideas daily, RSS-sourced news is auto-translated into ko/en/ja and deployed, and a Telegram-connected talent deck is available alongside.
- Typdit - Anonymous short-form text platform that publishes not only the finished post but the typing process itself — every pause, deletion, and revision.
- DeepThought - Open in the browser, structure thinking in seconds, publish the result as a link, and let other people fork it into their own draft. Zero install, free, with browser-side AI assistance.
- BootSignal - One shared loader (bootsignal.js) adds widgets like comments and likes to any site — sign-in, storage, and i18n included. Free monthly per site; usage-based credits beyond that from your shared mrlatte wallet. Content-unlock (paywall) format coming too.
- Out of Sandbox - A discovery site to showcase and find the products I build. Like Product Hunt — post products, browse, and collect reactions via upvotes and comments. Login submission, one-vote-per-user upvotes, comments, in ko/en/ja.
Support
Latest writing
The Agentic-First Operating Model