AI Software Development
custom AI features built into what you already run
We add LLM, RAG, and automation to your existing software, or ship a new AI SaaS MVP fast. One team owns everything from requirements to deployment, removing the coordination overhead that multi-vendor subcontracting creates. Timeline and price are fixed in a written quote once scope is confirmed.
Tell us what you want to build and we will review feasibility and scope for free, in writing. No obligation to proceed.
Add AI features
We add AI features to a service you are already running — document search, summarization, recommendations, and automatic classification, aimed at user-facing value.
- RAG API for document and data search
- Content summarization and generation AI
- Recommendation and classification based on user behavior
AI API and backend development
We build AI infrastructure APIs — LLM routing, embeddings, vector search — and route across multiple LLM vendors depending on the situation.
- RAG, embedding, and vector search engine
- Multi-LLM routing (optimized for cost and quality)
- Streaming, caching, and latency optimization
AI SaaS MVP build
Works even if all you have is an idea. We ship an MVP fast on a Next.js + Vercel AI SDK + vector DB full stack.
- Full stack on Next.js + Vercel AI SDK
- Vector DB, auth, and payment integration
- First version shipped within 1–2 months
From requirements to handover, in a fixed order
You don't need a finished spec. Three things are enough — the work you want to replace, who the users are, and what you already run. Scope and price come back in writing.
Share the requirements
Email us three things: ① the work or service you want to replace ② who the users are ③ the systems you already run. We start in writing — no meeting required.
Scope and acceptance criteria
Fixed scope, out-of-scope items, and acceptance criteria (pass conditions per feature) are written into the contract as numbers. Work starts with a half-upfront payment.
Build with demos
We build fast on an AI-native loop and share a working screen at each checkpoint, so a wrong direction gets corrected immediately.
Handover and warranty
The system is set up to run in your own accounts, and bugs or breakage in the first 6 months after launch are fixed free of charge. Maintenance afterward is optional.
Acceptance is defined as 'it works', not 'it was built'. Each feature gets a numeric pass condition, verified together at handover.
Other development we take on
General development without AI runs the same way. We confirm requirements first, then send scope and price as a written quote.
Collect public web page data on a schedule into a sheet or database, with an alert when collection stops.
Clean scattered Excel and PDF data into a set format and label it against your classification rules.
Manage inventory, orders, vendors, and approvals in one internal program instead of spreadsheets.
Move spreadsheet data into a database and hand it over with record counts and totals checked against the source.
One dashboard for bookings, customers, sales, and stock, on both phone and PC.
Stores with payment, shipping, and membership built on platforms such as Cafe24.
Turn design mockups into web pages that look the same on desktop and mobile.
Set up servers, domains, HTTPS, and backups, or migrate from an existing server.
From planning to store release, including starting as a web app to cut cost.
Casual games that open from a link without installation, and mini games for events and promotions.
We connect to the systems you already run
These are the integration targets that outsourcing requests actually asked for. Nothing gets replaced — we pull data out of what you run today, move it, and wire it together.
LLM and AI agents
- OpenAI, Anthropic, Google APIs
- RAG vector search
- Multi-agent
- Existing chatbot screens
Connect internal documents and data to LLMs as agents that split search, review, and generation into steps, then attach them by API to the screens you already run.
ERP, CRM, internal systems
- Younglimwon ERP
- Douzone
- ServiceNow
- CRM
- Logistics WMS (e.g. Packiyo)
- Internal DB
Read the values you need from the ERP database on a schedule and send them to an external API, and exchange intake and settlement status with your work tools so the same entry is never typed twice.
Commerce and sales channels
- Open-market APIs
- Cafe24
- Godomall
- imweb
- POS and SCM
Send product listings, orders, and stock to each sales channel in its own format, and gather sales data into one dashboard.
Login, payment, booking
- Kakao Sync (Kakao login)
- PG payments
- Naver Booking
- Lodging channels (PMS)
- NFC passes
Add simple login and payment to an existing member or order system, and find and fix sync errors between booking channels.
External data and public APIs
- Price APIs (gold, securities)
- Kiwoom Open API
- Weather and news
- Public web crawling
Pull external data on a schedule and store it, with an alert when collection stops or the format changes.
Equipment, sensors, legacy programs
- Industrial sensors and DAQ
- Barcode scanners
- Beacons
- VB 6.0 programs
Receive values from equipment in a PC program and store them in a database, and move aging VB 6.0 programs to .NET with matching behavior.
For systems not on this list, we check API and database access first and reply in writing on whether the integration is feasible.
What you receive at handover
The same feature can ship in different forms depending on where it is used. We settle the form together at the quote stage.
A responsive web app for desktop and mobile, plus an admin screen where operators view and correct data.
Android and iOS apps (Flutter and others) including the release process on both stores, or a web app that needs no install.
Windows programs that have to talk to on-site equipment such as sensors, barcode scanners, and control boards.
Server batch jobs with no screen that move data at set times, with failure alerts.
Calculations, status boards, and auto-entry running inside the Google Sheets or work tools you already use.
The system is handed over to run in your own accounts, with operating notes in writing.
Tech stack
This is tooling, not the point. We combine it around the problem each project presents, and skip technologies nothing needs.
Next.js (App Router) · React · Tailwind CSS · shadcn/ui
Next.js API Routes · Vercel AI SDK · Python FastAPI
OpenAI, Anthropic, Google (multi-vendor) · LangChain · LlamaIndex
Vercel Fluid Compute · Supabase · Turso · Upstash Vector · n8n
Flutter · React Native · Python desktop · .NET (VB 6.0 migration)
WordPress · imweb · Cafe24 · Godomall · Gnuboard
Python schedulers · crawlers · Google Apps Script · Looker Studio
Pricing
Every project is a one-time build fee plus a monthly maintenance fee. We recommend a maintenance agreement once the build ships, to keep operations stable.
One-time build fee
Covers requirements, design, development, testing, and deployment. You can choose source-code handover or a hosted SaaS arrangement.
Monthly maintenance fee
Covers server and API operation, bug fixes, feature stabilization, and security updates.
We provide an exact quote through a free consultation.
Need AI software built?
A free consultation is enough for us to scope your requirements and approach.
Contact: contact@sgkstudio.co.kr