# Sierra C.

> Software Engineer at Shepherd

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/sierrac

## Work Experience
### Software Engineer @ Shepherd
Jan 2025 – Present | San Francisco, CA

### Senior Software Engineer @ Sparrow
Jan 2024 – Jan 2025

### Software Engineer @ Sparrow
Jan 2022 – Jan 2024
Sparrow is the first end-to-end leave management solution for modern employers to care for their people during major life events. Sparrow's high-tech, high-touch approach automates the most painful parts of employee leave management, while our world-class leave specialist team ensures a
premium experience for all types of leaves across the United States and Canada. By partnering with Sparrow, caring companies reduce compliance risks, enhance the employee experience, and contain costs.

### Software Engineer @ EducationSuperHighway
Jan 2019 – Jan 2022 | San Francisco Bay Area
Worked as a full-stack engineer on the following products:
1. Affordable Connectivity Program enrollment support wizard (mobile-friendly React app)
2. K-12 Bridge to Broadband: a data exchange platform built on AWS allowing school district, city and state users to map households that lack home broadband, helping them optimize their use of federal funding
3. connectk12.org: A price transparency tool to help schools continue to upgrade their internet using the E-rate program

### Data Engineer @ EducationSuperHighway
Jan 2018 – Jan 2019 | San Francisco Bay Area
-Developed machine learning and outlier detection algorithms to help automate data cleaning
-Contributed to re-architecture of PostgreSQL data warehouse
-Created custom internal tooling for analytics team

### Data Analyst @ EducationSuperHighway
Jan 2017 – Jan 2018 | San Francisco Bay Area

### Senior Analyst - Marketing Analytics @ PayPal
Jan 2016 – Jan 2017 | San Francisco Bay Area

### Analyst - Marketing Analytics @ PayPal
Jan 2014 – Jan 2016 | San Francisco Bay Area


## Education
### Master of Science in Engineering (MSE) in Applied Mathematics and Statistics
The Johns Hopkins University

### Bachelor of Science (B.S.) in Applied Mathematics and Statistics
The Johns Hopkins University


## Contact & Social
- LinkedIn: https://linkedin.com/in/scostanza
- GitHub: https://github.com/sierra073

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Source: https://flows.cv/sierrac
JSON Resume: https://flows.cv/sierrac/resume.json
Last updated: 2026-04-10