# Bill Cox

> Software Engineer

Location: San Francisco, California, United States
Profile: https://flows.cv/billcox

## Work Experience
### Senior Software Engineer @ Rynly
Jan 2023 – Present
Building and maintaining an enterprise SaaS product for delivery management. Scaled from near-zero to $1.8M annual revenue as a team of two engineers.

Work areas include backend product development, API integrations, event-driven architecture, Azure infrastructure and devops, product strategy, and project management directly with clients.

### Non-Compete @ Citadel
Jan 2021 – Jan 2022 | New York, New York, United States

### Quantitative Developer @ Citadel
Jan 2021 – Jan 2021 | New York, New York, United States
Built vendor data ETL pipelines and APIs from scratch for a new trading business. Automated derived calculations from the raw data to help build research and prediction models.

### Software Engineer III @ Addepar
Jan 2020 – Jan 2020 | New York, New York, United States
Built a reliable, high-volume market data pipeline using Apache Kafka. Migrated the market data functionality of the application to a microservice architecture.

### Software Engineer II @ Addepar
Jan 2018 – Jan 2020 | New York, New York, United States
Developed and maintained high-volume data pipelines to import market data into the portfolio analysis application using Python and Apache Airflow. Built a new data feed that greatly expanded coverage of fixed income market data, and now serves as the primary data source thereof.

### Software Engineer I @ Addepar
Jan 2018 – Jan 2018 | New York, New York, United States
Expanded the calculation model for fixed income and alternatives within a full-stack Java application. Increased calculation accuracy and broadened support for more complex securities, such as callable bonds and private equity. Implemented generalized calculation engines for accrued income, modified duration, and public market equivalent (PME) calculations, among others.


## Education
### A.B. in Honors Computer Science
Harvard University

### High School Diploma
Georgetown Day School

### Summer Science Program (SSP)


## Contact & Social
- LinkedIn: https://linkedin.com/in/bill-cox-515b82130

---
Source: https://flows.cv/billcox
JSON Resume: https://flows.cv/billcox/resume.json
Last updated: 2026-04-05