# Yongkyun (Daniel) Lee > Founder | Author of codepointer.substack.com Location: Mountain View, California, United States Profile: https://flows.cv/yongkyun I am a software engineer eager to build and learn. ## Work Experience ### Software Engineer @ Onehouse Jan 2022 – Jan 2026 | Sunnyvale, California, United States ### Analyst @ Goldman Sachs Jan 2021 – Jan 2022 | New York, New York, United States ### Founding Engineer @ PageNow Jan 2021 – Jan 2022 • Launched an open-source (github.com/pagenow) Chrome extension for real-time activity sharing. • Designed and built a secure and scalable serverless real-time presence and chat API from the ground up using AWS services, like Lambda, Elasticache (Redis), DynamoDB, and API Gateway. • Designed and built a user information handling backend API from the ground up. Deployed the service with load balancing and auto-scaling to AWS using Terraform. • Built the extension popup and the injected web app with an event-driven design using React and Angular. • Conducted surveys and analyzed user activity data to release features and UI/UX enhancements iteratively. ### Software Engineer Intern @ Lablup Inc. Jan 2020 – Jan 2020 | Seoul, South Korea • Implemented group and domain level dotfile support and service port validation upon kernel creation. • Developed storage proxy support for XFS and advanced features for the Backend.AI virtual folder system. ### Summer Analyst @ Goldman Sachs Jan 2020 – Jan 2020 | New York, New York, United States • Developed a full-stack (Angular, Java, MongoDB) web application used by traders in PWM (Personal Wealth Management). ### Software Engineer Intern @ Onclusive (formerly AirPR) Jan 2019 – Jan 2019 | Burlingame, California, United States • Researched and developed a url-based spam filter, using machine learning and NLP, and integrated it into the company crawler. Replaced the manual work needed to add domains to the crawler denylist. • Developed a top publication domain monitoring pipeline using time-series anomaly detection. Reduced the time it takes for engineers to recognize problems with the crawler. • Used AWS Lambda, Step Function, Batch, and SES for both tasks. ### Software Developer Part-time @ Caltech Jan 2018 – Jan 2019 | Pasadena, California • Maintained and updated Textpresso at Wormbase Lab. ### Research Intern @ NAVER Corp Jan 2018 – Jan 2018 | Seongnam, Gyeonggi, South Korea • Researched instrument recognition of classical music with the members of the Music AI Team. • Applied GradCAM, a CNN-based model from computer vision to music for the first time as of my knowledge. • Implemented state-of-art research on instrument recognition and TTS using PyTorch. • Processed music data of MusicNet Dataset consisted of over 1M annotated labels and 24 hours of music. ### Squad Commander (Sergeant) @ Republic of Korea Army Jan 2016 – Jan 2018 | Seongnam, Gyeonggi, South Korea • Wrote code to automatically process and extract useful data from 10,000+ pieces of texts generated every day. • Served as Squad Commander for 3 months. ### Software Engineer Intern @ EditCollective Jan 2016 – Jan 2016 | Seoul, South Korea • Designed forms used for manufacturing concrete pieces of a pavilion to be built on the rooftop of Kwanjeong Library at Seoul National University. • Worked on urban/real estate/environmental analysis of buildings with algorithmic programming in 3D modeling software. • Learned and used Rhinoceros 5 (3D modeling software) and GhPython (Python extension of graphic algorithm editor) for design and analysis. ### Research Intern @ GIST(Gwangju Institute of Science & Technology) Jan 2014 – Jan 2014 | Gwangju, South Korea • Investigated the chirping sound generated by the collision of two steel balls through theory and experiments using FFT and STFT. • Presented the research on the 21st International Congress on Sound and Vibration (ICSV21), Beijing, China. ## Education ### Bachelor's degree in Computer Science, Business/Economics/Management Caltech ### High School Korean Minjok Leadership Academy ## Contact & Social - LinkedIn: https://linkedin.com/in/yongkyunlee - Website: https://noninertialframe.com - Website: https://codepointer.substack.com --- Source: https://flows.cv/yongkyun JSON Resume: https://flows.cv/yongkyun/resume.json Last updated: 2026-04-01