# Colin Harfst

> Software Engineer at CarMax // Graduate of the University of Virginia, Class of 2018, Math & CS

Location: Seattle, Washington, United States
Profile: https://flows.cv/colinharfst

charfst.com

## Work Experience
### Senior Software Engineer @ CarMax
Jan 2023 – Present | Seattle, WA

### Software Engineer II @ CarMax
Jan 2021 – Jan 2023

### Freelance Software Engineer @ FlyCast River Forecast
Jan 2021 – Jan 2023

### Senior Software Engineering Consultant @ CapTech Ventures, Inc
Jan 2021 – Jan 2021 | Washington, DC
Fortune 500 insurance holding company (Apr 2020 - May 2021)
- Developed and tested a full-stack web application to track insurance claims within an interactive dashboard (Vue, Django, and SQL)
- Enhanced existing database ETL processes to normalize data from multiple source systems

Fortune 500 automotive retailer (Feb 2019 - Apr 2020)
- Developed and tested a full-stack web application to process vehicle sales (React and .NET Core)
- Developed features to relay customer loan requests to financial institutions in real-time using WebSockets
- Designed the primary production support dashboard and alerting system using Azure Application Insights
- Wrote automated tests using WebdriverIO

Fortune 500 consumer product manufacturer (Sep 2018 - Dec 2018)
- Developed and tested an API for verifying and authenticating user identities  (.NET Core) 
- Integrated internal authentication solutions with external solutions, such as LexisNexis

### Software Engineering Consultant @ CapTech Ventures, Inc
Jan 2018 – Jan 2021 | Richmond, Virginia

### Undergraduate Computer Science Teaching Assistant @ University of Virginia
Jan 2017 – Jan 2018 | Charlottesville, Virginia
- Guided students in their efforts to construct formal proofs, under three different instructors, for the course Discrete Mathematics
- Held twice-weekly office hours to assist students with homework and exam preparation
- Graded homework submissions and exams for hundreds of students

### Data Analyst Intern @ IST Research Corp
Jan 2017 – Jan 2017 | Fredericksburg, Virginia
- Developed and tested a data analytics API which connected to a database of text and images scraped from Twitter (Flask, ElasticSearch, and Docker)
- Developed endpoints to perform reverse image searches and natural language processing tasks such as sentiment analysis and named-entity recognition

### Undergraduate Mathematics Researcher @ University of Virginia
Jan 2016 – Jan 2016 | Charlottesville, Virginia
- Studied types of hypergraphs using an abstract algebra-oriented programming language (Macaulay2)
- Guided research on an unproven conjecture in abstract algebra by systematically generating examples of hypergraphs with a special quality


## Education
### Bachelor of Arts - BA in Mathematics and Computer Science
University of Virginia
Jan 2014 – Jan 2018


## Contact & Social
- LinkedIn: https://linkedin.com/in/colin-harfst-3654ab132
- Website: https://charfst.com

---
Source: https://flows.cv/colinharfst
JSON Resume: https://flows.cv/colinharfst/resume.json
Last updated: 2026-03-22