Career Resume

Career Objective

Innovative senior software engineer with 25+ years of experience spanning geospatial systems, AI pipelines, and 3D data processing. Passionate about high-performance computing and end-to-end system design. Seeking a technical leadership or R&D role to drive next-generation innovation.

Professional Summary

Currently spearheading AI-driven 3D building segmentation with photogrammetry at Wemap.ai, leveraging Python (PyTorch) and modern ML inference pipelines alongside deep C++ expertise to deliver next-generation spatial solutions.
Broadened scope at Amazon by building multimedia/audio pipelines for Alexa devices, showcasing adaptability beyond the spatial computing domain.
Modernized 3D CAD design workflows and user interface at Vectorworks, enhancing performance and usability for architectural design professionals.
Engineered large-scale geocoding and address management systems at CoreLogic, scaling to nationwide spatial datasets.
Built robust pipelines for 3D building construction and geospatial data integration at SK C&C, enabling large-scale city modeling.
Developed state-of-the-art 3D terrain generation technology at Microsoft, powering immersive mapping platforms.
Led development of satellite data and image processing solutions at Vexcel, driving innovation in geospatial imagery.

Technical background

Affiliations

Geospatial processing
Satellite telemetry
Multimedia with FFMpeg
Machine learning

Photogrammetry
Computational geometry
Data pipeline
Image Processing

3D data processing
Geocoding
Data bit filtering/correction
GCP/AWS

Methodologies

Object oriented programming
Meta programming
Micro services

Optimization
Test oriented development
Parallelization

Event driven programming
Agile programming
GPU driven algorithms

Programming Languages / Tools

C++ (20+ yrs)
Perl
PostgreSQL

python (5+ yrs)
JavaScript
SQLite

C# (3+ yrs)
QML
MySQL

C
Java
SQLServer

Career History

Dev Lead — Wemap

Mar 2024 ~ Current
Seoul, South Korea

Working as an advisor and developer for various next generation business ideas

Building Segmentation: AI:

Integrated existing vanilla building segmentation AI model to fit into single 10 Gbyte GPU.
Performance data curing of input aerial pictures with cocoa format mask files.
Trained with custom configuration raster spec and 4000+ images
Tuned parameters for the best inference results from the optimized AI model.

Automatic building mask:

Wrote multi stage building mask extraction algorithms by using AI as well as heuristics from 3D surfaces and images.

3D building extraction:

Developed simplistic 3D building creation module from 3D surface data.
Applied automatic building mask output files and computational geometry algorithms

DEM for Urban City:

Applied various DEM creation algorithms in python to deliver high resolution surface
Provided multiple pipeline components with configurations and callable from Tck/Tk GUI

Image archive platform:

Developing aerial image depot web site for generic public with underlying MapLibre platform.

python numpy scipy pytorch C++ postgreSQL CGAL 3D TIN RANSAC JavaScript MapLibre Tcl/Tk datacube flask

SDE IV — Amazon

Sep 2021 ~ Jan 2024
Irvine, CA

Contributed to Alexa’s multimedia audio streaming team, working across device, cloud, and software stacks to support high-performance streaming services.

Senior SDE — CoreLogic

Jan 2020 ~ Aug 2021
Irvine, CA

Participated in transforming existing geospatial production within google cloud environment

Senior SDE — Smartmatic

Jul 2019 ~ Dec 2019
Santa Monica, CA

Supported the software development of electronic voting systems during a time-sensitive pre-election phase. Worked within a modular GTK++-based Linux environment with strict CI/CD pipeline.

SDE — Vectorworks

Aug 2017 ~ Jan 2019
Columbia, MD

Worked on the modernization and performance optimization of a legacy C++ 3D CAD codebase.

Senior SDE — Medtronic

Dec 2014 ~ Jul 2017
Louisville, CO

Participated in creating new Surgical Navigation Platform composed of microservices for use in operating rooms. Worked as full-stack developer writing front/back end and task controllers.

Analog video service:

Integrated ultrasound video streams into the platform via analog video capture (V4L2)
Developed fault-tolerant control mechanisms to maintain screen activity despite signal instability—critical for uninterrupted surgical visualization.
Resolved performance issues from large RabbitMQ message payloads by implementing a shared-memory blob architecture

Instrument/settings service:

Dealt with various instrument availability and compatibility for surgeon
Produces different menu and selections for patient and surgeon settings
Designed SQL table schema and wrote stored procedures

Microscope calibration:

Learned calibration process for medical microscope and helped to improve calibration process by supporting more hardware module handlers.

C++ python rabbitMQ PostgreSQL QML RS232 boost (signal/slot) gtest

Senior DevOps Engineer — CoreLogic

May 2011 ~ Nov 2014
Boulder, CO

Inherited a large-scale C/C++ geocoding engine. Focused on system interoperability, API modernization, and performance optimization of geospatial algorithms.

Software Dev manager — SK C&C

Jul 2009 ~ Apr 2011
Seoul, South Korea

Managed a team of mid-level C++ engineers and drove a transformation in engineering focus, planning discipline, and delivery pace. Also participated in inter-team collaborations, planning and hiring decisions.

SDE II — Microsoft

May 2006 ~ May 2009
Boulder, CO

As mid level developer, I contributed in core algorithm development for the global scale production of 3D map creation.

Web based ground station:

Implemented middleware to understand satellite telemetry and process meta information to store back to MS SQL.

Digital Elevation Surface:

Within Microsoft's Image Processing Framework, design and implement novel algorithms to produce digital elevation model from very high resolution digital surface model data.
Enabled company to produce accurate DEMs for over 100 U.S. cities, laying the groundwork for high-quality terrain integration in Bing Maps
Received Microsoft’s internal Gold Star Award.

Platform migration:

Migrated unix/big-endian based software projects to be compiled with windows/little-endian architecture.

Visual C++ C# C++/CLI Multithreading POSIX SQLServer gcc ArcGIS Erdas Imagine

Software Engineer — Vexcel Corp.

Oct 2000 ~ Apr 2006
Boulder, CO

Designed and implemented core low-level algorithms for satellite telemetry processing and real-time data delivery systems. Led key projects that transitioned Vexcel's ground station systems toward more efficient, multi-threaded, and Linux-based platforms.

Satellite telemetry processing:

Extended bit synchronization modules to support new satellite systems including Landsat-7, SPOT-2, MODIS, Aqua, Terra, Envisat, Orbview, and WorldView

Software Reed-Solomon encoder/decoder:

Developed generic purpose Reed-solomon encoders and decoders to be used for correcting bit errors

Realtime satellite image broadcast system:

Produce and distribute satellite level 0 images while capturing through hardware

Xilinx OS Upgrade:

Within existing firmware to handle Xilinx implementation of capture hardware, added dynamic hardware configuration support through flash memory load within boot

C++ C avr-gcc Perl Java Multithreading Satellite telemetry Sensor processing IRIX64 SunOS Alpha RS232 SunOS tcp/ip Firmware

Education

University of Michigan — M.S.E.E., 3.7/4.0

Sep 1998 ~ Apr 2000
Ann Arbor, MI

Optoelectronics
Classical Optics
Operating Systems

LASER
Linear Algebra

Nonlinear Optics
Object Oriented Software

Yonsei University — B.S.E.E., 3.5/4.0

Mar 1991 ~ Aug 1996
Seoul, South Korea

Analog/Digital Communications
Digital control system

Probability
Signals and systems

Computer Architecture
Electromagnetics