hiring + trust surface

Senior data engineer building useful products in public.

Built by Chris S. Yoon. Hiring-focused surface for proven data engineering, small product loops, and visible execution.

See selected work Read background

Experience

10+ years

Data engineering across fintech, media, and enterprise.

Latest role

Senior Data Engineer

Most recently at theScore / ESPN Bet.

Current track

Visible execution

Small product loops and public proof.

how this site works

Credibility up front. Execution underneath.

1% Better.dev

1% Betterdev · ship small. learn fast.

Make the work legible fast, then let the products and repos carry the proof.

Background first. Proof underneath.

Useful scope beats bigger promises.

Public work should feel easy to trust.

What this site proves

Depth

Product work on real engineering footing.

Range

Product judgment, engineering craft, shipping discipline.

Pace

Recent work that stays easy to verify.

Separate verticals

Specialist lanes stay separate.

The dev surface stays centered on hiring and credibility.

Future surface area should be earned.

Selected work · linked activity

Selected work and public proof.

Active product loops, supporting systems, and proof of work.

Current Main Build

The project that best represents current direction, technical depth, and active focus.

Current focus

Private AI Poker Backend

Current main build in poker, rebuilt from the foundation up to support backend truth, memory, and product iteration.

Building

Workflow BuildPrivate build

Current main build

Private build · technical proof only

Poker surface

Secondary Builds

Smaller products that still show judgment and shipping instinct, but are no longer the main focus.

1% Better Today

A smaller daily product loop that now sits behind the current main build.Prototype · 0%

Target MVP: April 2026

Auto target 18 commits · 14d activity 0

FastAPI

Supabase

Stripe

iOS

Android

1% Better - Focus

sukminc/opb-dev-focus

A lightweight focus timer kept as a secondary build rather than the current main focus.Syncing...

Target MVP: Q2 2026

Auto target 18 commits · 14d activity 0

Flutter

Dart

Supabase

iOS

Android

Operating Layer

The public site and internal systems behind the surface.

1% Better - This Website

sukminc/opb-dev-frontend

The public front door for hiring, trust, and the whole shipping story.Live ✓

MVP reached

Next.js

TypeScript

Vercel

1% Better - OS

Workflow automation for repeatable project shipping.Live ✓

Internal workflow system already supporting the portfolio

Workflow engine activeLanding sync in useWeekly ops layer running

Python

GitHub Actions

JSON

CLI

Archive / Proof of Work

Past work that keeps engineering depth visible.

Blue Jays Moneyball ETL

sukminc/deng-bluejays-financial

Archive of data engineering work and pipeline thinking.Archive

Proof-of-work archive

Python

Apache Airflow

PostgreSQL

Docker

GitHub Actions

TwelveLabs API Validator

sukminc/sdet-twelvelabs

Interview challenge archive for multimodal API validation.Archive

Proof-of-work archive

Python

TwelveLabs

Pytest

About

Chris S. Yoon

10+ years in data engineering, validation, and automation. Most recent role: Senior Data Engineer at theScore / ESPN Bet. Current main build: a private AI poker backend and poker performance system rebuilt from the foundation around backend truth, cumulative memory, runtime outputs, and QA-shaped product iteration.

Open to Senior Data / Platform / AI Product roles

Recruiter path

Career context, then current work.

Background first, then current work, then LinkedIn or GitHub if you want more.

Read background Open LinkedIn