Full-stack developer · Seoul

I ship the whole stack

I design the data model, build the API, and craft the interface on top of it — so features arrive whole, not half-finished. Here is a selection of what I have shipped.

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feature.ts — the whole stack

// schema → api → interface, one owner
const schema = migrate("orders", {
  rls: "owner_only",
});

const api = endpoint("/orders", {
  contract: typed(OrderInput),
});

export function OrdersScreen() {
  return <List source={api} />;
}
// shipped whole, not half-finished

How I work

One engineer, the whole feature

Most work needs a schema change, an API endpoint, and a screen to drive it. I do all three, which means fewer handoffs, tighter feedback loops, and features that actually ship.

Backend that holds up

Normalized schemas, idempotent workers, and row-level security — the parts that quietly keep data correct under load.

APIs you can trust

Typed contracts, thoughtful caching, and honest error states, so the front end never has to guess what the server meant.

Interfaces that feel fast

Optimistic updates, accessible components, and layouts that stay responsive from a warehouse phone to a 4K monitor.

How a feature travels through the stack

day 1

Schema

Model the data first — migrations, constraints, and RLS from the start.

day 2

API

Typed endpoints with tests, honest errors, and pagination that scales.

day 3-4

Interface

Screens wired to the real API — loading, empty, and error states included.

day 5

Ship & observe

Feature-flagged rollout with logs and metrics watching the seams.

Selected work

Projects

Case studies from real products — billing, CRM, realtime collaboration, and more. Open any card for the role, the stack, and the measured impact.

Featured

SaaS Billing & Subscriptions Platform

2024

A metered billing engine handling usage aggregation, Stripe webhooks, and self-serve plan changes for a B2B SaaS.

TypeScriptNext.jsNode.jsPostgreSQL

View case study

Featured

Multi-Tenant CRM

2024

A team CRM with row-level tenant isolation, granular roles, and a fast keyboard-driven pipeline board.

TypeScriptReactGraphQLPrisma

View case study

Realtime Collaborative Editor

2023

A Google-Docs-style editor with conflict-free multi-cursor editing backed by CRDTs over WebSockets.

TypeScriptReactGoWebSocket

View case study

Warehouse Inventory App

2023

An offline-first mobile app for barcode scanning and stock counts that syncs the moment a signal returns.

React NativeTypeScriptSQLiteNode.js

View case study

GraphQL API Gateway

2022

A federated gateway that stitches six backend services into one typed schema with per-field caching.

TypeScriptGraphQLNode.jsRedis

View case study

Have a product that needs the full stack?

I'm open to full-time roles and focused contract work — especially gnarly data problems and greenfield builds. Tell me what you're building.

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