MLX Data Manager
A data management system designed for machine learning workloads, offering a Hugging Face-compatible interface for ease of adoption, along with data version control and lineage tracking.
DataMLKotlinPython
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Projects
Highlights from recent roles, then previous work and the archive.
Highlights
Hand-written Font Generator
Given a sheet of handwritten paper, generate a font that resembles the handwriting.
MLKotlin
Data Lake
Ingested and aggregated operational data—from Kafka into S3 (ORC format)—for analytics, ensuring integrity with deduplication and exactly-once delivery semantics.
javakafkas3
Previous Works
- Flow (Inter-domain logistics state management system) Handling write-heavy workloads with Cassandra and message ordering guarantee with a distributed queue.
Flow (Inter-domain logistics state management system)
Handling write-heavy workloads with Cassandra and message ordering guarantee with a distributed queue.
javacassandrakafka - Ecosystem Pipeline (Durango) Distributed pipeline so the simulator runs in bounded time as the world grows: Dockerized jobs, spatial chunking, and “no audience, no play” cost control.
Ecosystem Pipeline (Durango)
Distributed pipeline so the simulator runs in bounded time as the world grows: Dockerized jobs, spatial chunking, and “no audience, no play” cost control.
DistributedAWSScalabilityGameRead write-up → - Ecosystem Simulator (Durango) Procedural world vegetation driven by soil, climate, and biomass rules—scaling heavy simulation with precalculation and GPU-friendly workloads.
Ecosystem Simulator (Durango)
Procedural world vegetation driven by soil, climate, and biomass rules—scaling heavy simulation with precalculation and GPU-friendly workloads.
C#OpenCLSimulationGameRead write-up → - Durango — server & overview Distributed MMORPG server at Nexon—overview of the system and how ecosystem sim, pipeline, and related pieces fit together.
Durango — server & overview
Distributed MMORPG server at Nexon—overview of the system and how ecosystem sim, pipeline, and related pieces fit together.
gamepythondistributed - SB Finance Personal finance tooling and experiments in the open.
SB Finance
Personal finance tooling and experiments in the open.
Open SourcePython
Archive
Older work and side projects
BOINC
Contributing compute to BOINC—on the order of 127 GFLOPS on average for climate modeling, prime search, stellar-stream simulations, and similar projects.
distributed computingscience
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Interview Questions
Curated a collection of interview questions and solutions from various tech companies, for personal reference and to support fellow engineers preparing for interviews.
PythonGoreference
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Coding Expedition
Writing code away from home—cafés, road trips, and a map of places. Longer story and map on this page.
JavaScripttravelmaps
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SB Coding Workshop
Workshop materials and exercises for teaching Python.
Pythoneducationleadership
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Secor
Upstream work on Pinterest Secor (Kafka to cloud storage), including handling map types in message serialization. Pull requests: #982, #965, and other authored PRs.
Javakafkadata pipeline
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Better Translator
A language translator that uses Japanese as an intermediate language. Processes +20,000 translation requests on a daily basis (as of Sep 2013).
PythonJavaScriptapplicationweb
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Smartrek
An ambitious project to solve urban traffic congestion problems. My primary responsibility in the team is to build a scalable system with Amazon EC2 platform, and to build in-house software for data analysis.
Javaapplicationtransportationbig data
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Winnowing
A Python implementation of the Winnowing (local algorithms for document fingerprinting)
Pythonalgorithmdocument fingerprinting
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ChemBook
An iOS app to help students with writing chemistry lab reports.
Objective CPythonapplicationchemistry
Purpose-built Appliance
Pending paper publication to PLOSone
PythonJavaScriptapplicationbig data
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Radioactivity
The project radioactivity had started in March of 2011 in an attempt to help the general public to be alerted regarding the spread of radiation and other radioactive materials originated from the catastrophic incident in the Fukushima nuclear power plant in Japan, by providing visual information of city-wise radition levels.
PythonJavaScriptapplicationwebdata visualization
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gdocsdb
A Python library to use Google Spreadsheet as a database.
Pythonlibrarydatabaseopen source
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Kindleholic
An RSS/Atom feed aggregation service for Amazon Kindle.
PythonJavaScriptapplicationwebebook
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Slow Drivers
PythonJavaScriptdata visualizationdata miningtransportation
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Teach Ourselves
A project to create a society for students in which learning and creativity is rewarded with points that can be redeemed for goods.
Action Scriptapplicationweb
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한자-한글 변환기
The name of the project is self-explanatory.
PythonJavaScriptapplication
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Bootstrapped Learning
A DARPA sponsored project to develop an electronic student that can learn from natural human instruction close to the way humans do.
JavaC++machine learninginterdisciplinary
Chemtalk
PythonJavaScriptapplicationchemistryweb
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maps
A project to reconstruct a map in global scale by collecting map tiles from various sources such as Google Maps and Open Street Map.
Pythonbig datadata mining
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Readown
A Markdown reader for Mac OS X.
Objective Capplicationmacopen source
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Violet
A children's book for iPad with user-interactable animations.
Objective Capplicationmobile
Notehall
PHPJavaScriptapplicationweb
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CQube
A labyrinth-like puzzle game for iPhone.
Objective Capplicationmobilegame
Mandelbrot set
A distributed processing project to draw a mandelbrot set using multiple computers.
JavaCapplication