Ryan Yejun Jeon
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CTO @ Immigo
San Francisco, California, United States
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CTO & Co-founderImmigo, MatterscaleDec 2020 - Current (4 years 6 months)1.5B English learners around the world struggle to find effective yet affordable ways to practice and improve their English. One-on-one classes are expensive, one-to-many classes don’t give you enough time to speak and self-learning apps like Duolingo don’t really hold you accountable. So we founded Immigo, Lambda School for learning English. At Immigo, learners can quickly find the right cohort of peers to practice with through enrolling in a structured English course that works. Using a peer-to-peer approach, learners hold each other accountable and learn effectively at a much lower cost- PSoftware InternPanafoldJun 2019 - Sep 2019 (4 months)- Created a REST API that generates permutation of an image given PNG files containing parts of the image with different texture utilizing Flask. - Implemented an auto image cropping script through Canny edge detection utilizing Sobel filter. - Developed a multifunctional image editing tool using KonvaJS and HTML Canvas. - Implemented a login validation for React Native mobile application - Implemented an optimized search functionality in the mobile application, through leveraging debounce.
- Software Engineering InternBelvedere Trading, LLCJan 2019 - Mar 2019 (3 months)- Deployed company-wide collaboration platform where traders and engineers can comment, like and favorite proposed features from Redmine leveraging React.js, and Flask. - Implemented a faceted search algorithm to allow users to search and filter by specific feature categories. - Implemented dynamic keyword highlighting using Regex matching. - Implemented a lightweight store to maintain global states, and separate data handling logics
- SSoftware Engineering InternJun 2018 - Sep 2018 (4 months)- Developed a transaction platform to streamline the bill splitting process between a group of users by building and integrating an intelligent algorithm that settles group expenses based on accumulated transaction activities within a group. - Created a REST API leveraging Node.js and MongoDB, to manage platform’s user database and various transaction information. - Worked in Agile environment, with two weeks long Sprints iteratively. - Created a WebSocket server to allow real time user interaction. - Pushed containerized application to docker registry in Kubernetes. - Integrated a Redis Pub/Sub server to handle scaling WebSocket servers
- LLead Front-End DeveloperDec 2017 - May 2018 (6 months)- Used data scraped from market intelligence data feeds and Python algorithm to determine high net-worth individuals for clients seeking investors . - Built user-interface through React displaying heat map, data table, and tree map displaying transaction and potential investors' data stored in SQL database.
- PPrivate TutorMar 2017 - Sep 2017 (7 months)- Taught English, math, chemistry, and physics to Korean high school students
- Research InternBeth Israel Deaconess Medical CenterJun 2015 - Aug 2015 (3 months)- Wrote an algorithm in C++ to automate the calculation of protein quantities within various samples in order to determine the correlation between activities within hypothalamus and insulin production -Presented research results during 3 months’ period
Education
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- NBachelor's Degree, Computer ScienceNorthwestern UniversityFeb 2017 - Nov 2020 (3 years 10 months)
- IBachelor's Degree, Computer ScienceInstituteFeb 2016 - Nov 2017 (1 year 10 months)