# William Kieffer

> BA in Computer Science

Location: New York, New York, United States
Profile: https://flows.cv/williamkieffer

BA in Computer Science from Columbia University. Experience in mobile and web application development as a full stack software developer. Learn more about me and my projects at https://www.williamkieffer.works/.

## Work Experience
### Software Engineer Intern @ Parkday
Jan 2023 – Jan 2023 | New York, New York, United States
- Developed and maintained a React-based web application for internal and external use, adding over 6 tools to improve client and internal user experience.
- Eliminated over 40,000 lines of code (20% of codebase) and added over 20,000 to optimize and add new features to front-end and back-end processes.
- Identified data storage inefficiencies and used Knex to restructure SQL database, resulting in the successful migration of thousands of records and deletion of 3 newly redundant tables.
- Analyzed and fine-tuned complex SQL queries, resulting in at least 25% reduction in database query execution for client dashboard and 50% for internal tools.

### Software Development Intern @ echo3D
Jan 2023 – Jan 2023 | New York, New York, United States
- Developed a 3D function manipulation application in Unity using AR/VR frameworks, C#, and the cross-platform, real-time cloud engine from echo3D that supports 3D/AR/VR/Metaverse projects.
- Created a Python program to parse functions and export three-dimensional models, streamlining data transfer for cloud upload.
- Hosted the program on a remote web server and designed an API for convenient access, ensuring seamless integration with other project components.

### Administrative Assistant @ Columbia University
Jan 2021 – Jan 2023 | New York, New York, United States
Assist and manage programs hosted by the economics department, in addition to other office/departmental needs.

### Research Assistant @ Columbia University
Jan 2021 – Jan 2021 | New York, New York, United States
Audio file transcription and categorization in spreadsheets to be used for ML model for the Corter Lab of Columbia University Teachers College.

### Web Design and Developer @ Unknown
Jan 2018 – Jan 2020 | Chillicothe, Missouri, United States
Designed and developed a customized website to replace previous outdated versions for three local businesses.
- Constructed websites using HTML, CSS, and JavaScript, locating hosting services and other specific needs.
- Dealt directly and independently with clients to ensure that needs and preferences of the business were met.

### Accounting Assistant @ Lockridge & Constant Accounting Firm
Jan 2018 – Jan 2020 | Chillicothe, Missouri, United States
Assisted with client information filing and processing tax returns.


## Contact & Social
- LinkedIn: https://linkedin.com/in/williamkieffer24

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Source: https://flows.cv/williamkieffer
JSON Resume: https://flows.cv/williamkieffer/resume.json
Last updated: 2026-03-20