Built exactly as you planned, deployed and run by one developer.

• New web products

  From your plan to screens, server, database, and deployment, built by one person.

  • Automated Design Generation B2B SaaS
  • Ddokform AI Survey Service Demo

• Admin and internal tools

  Dashboards, lists and search, permissions, settings: the screens an operations team uses every day.

  • AI MLOps Platform Frontend
  • URL Shortener and Traffic Analytics

• Mobile apps

  iOS and Android from a single codebase with Flutter or React Native.

  • Asset Management, Real Estate and Financial Info App
  • Early Calf Disease Detection Service

• API integrations and data collection

  Connecting third-party APIs such as e-commerce platforms and search trends, with collection jobs that run every day.

  • ERP and Online Store API Integration Backend
  • Automated Keyword Search Trend Collection

• Taking over live products

  Adding features to code someone else wrote, or moving an aging stack onto TypeScript.

  • Feature Additions to an Exam Authoring and Grading Platform
  • Global Cross-Border Platform

• Infrastructure and deployment

  AWS, Docker, and Nginx setups with automated deploys, and hands-on experience running high-traffic services.

  • Original Music Sharing Community
  • Automated Design Generation B2B SaaS

• “Implemented every feature they had doubted was even possible, exactly as planned”

  business automation software

• “Even as an individual developer, understood the goal very well and matched the project brief exactly”

  Naver DataLab auto-collection tool

• “Fast communication, a real grasp of the project, truly the best service mindset”

  responsive website for a financial service

Support during the post-delivery warranty period was rated separately too: 5.00.

• React, TypeScript, NestJS, Prisma137 days solo, 236 APIs and 105 screens2025.07 – 2025.11, ContractAutomated Design Generation B2B SaaSA SaaS that turns input data into design output based on templates, built solo from design through operation (Wishket contract, 137 days)
• Next.js, TypeScript, TanStack Query, Tailwind CSS122 days as senior, 159 screens2024.12 – 2025.04, Fixed-termAI MLOps Platform FrontendFrontend for the management console of a Kubernetes MLOps platform (Wishket fixed-term engagement as a senior developer, 122 days)
• 2022.10 – 2022.12, ContractArtist Social PlatformA matching service where creators connect, collaborate and share portfolios (a large enterprise's in-house venture)Full stack: app, web, server
• 2023.01 – 2023.02, ContractAsset Management, Real Estate and Financial Info AppA Flutter app that brings real estate and financial management together, with about 100 pages of screensAbout 100 pages of screens
• 2026.08, ContractDdokform AI Survey Service DemoA review demo for an AI survey service, commissioned by a client I had worked with three times on Wishket, built and deployed in a single dayDeployed in one day, fourth repeat engagement
• Java, Spring, MyBatis, OAuth 2.014-day fixed-term engagement2026.03, Fixed-termERP and Online Store API Integration BackendA backend that syncs products and orders between an in-house ERP and the Cafe24 Open API (Wishket fixed-term engagement, 14 days)

• Built a KRW 45M B2B SaaS solo: 31 data models, 236 APIs (147 GraphQL, 89 REST), 80+ screens, 73 test files
• Kept supporting the same service after delivery on a monthly maintenance contract: 385 hours over 6 months (2026.03 ~ 2026.08)
• Top committer on the frontend team of a Kubernetes MLOps admin console (159 screens): 487 of 1,656 commits (fixed-term senior role, 122 days)
• Four contracts with the same client since 2024 (three repeat contracts after the first)
• Built and ran a community of 1,000 concurrent users by myself for 11 years

1. 1

   Scope

   I read your brief and plan, then agree with you on what to build first. Clients have said this is how their plans got built exactly as intended.

2. 2

   One developer, start to finish

   I design and build the screens, server, and database myself. Requirements don't get lost between people, and I write code the next person can read.

3. 3

   Handed over deployed

   I hand over with the servers set up and deploys automated. My largest SaaS project I took from design through deployment and operations on my own.

4. 4

   After delivery

   I kept responding through the warranty period and earned a separate rating of 5.00 for it. The largest project continued as a monthly maintenance contract.

• Admin ConsoleOperations console for Strollo, a fictional walk-to-earn app. Eleven pages of members, points, settlements, and push, plus feature specs
• AI Survey Service Ddokform new tab, Korean UIA review demo of an AI survey service for a returning client. Survey creation, sharing, response tallies, and reports, built and deployed in one day
• Lifestyle Select ShopA shopping flow across four pages: product list, search, detail, and cart
• Mobile App LandingFeature and install landing page for Strollo, the same fictional app as the admin console
• Home Care BookingPick a cleaning or repair service, choose a date and time, and book on the spot
• Corporate WebsiteA five-page company site with about, business areas, track record, and notices
• City Pledge TrackerA civic page showing the progress of the fictional City of Riverton's pledges by area