# Sophia (Xiaofeng) Xie

> Custody & Stablecoin & RippleX Performance Engineering

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

Over 25 years of experience in large-scale software product architecture design and development. 20+ years of leadership in Software Performance Engineering. Specialized in full-stack large distributed software systems performance, scalability, and reliability testing, tuning, and capacity sizing. Possess innovative and effective methodologies from developing a production load simulator to delivering bottleneck-free software products. Full-stack distributed systems tuning, from network to OS to software code.

## Work Experience
### Principal Engineer @ Ripple
Jan 2022 – Present | San Francisco, California, United States

### Software Engineering Architect @ Salesforce
Jan 2015 – Jan 2022 | San Francisco
Headed performance engineering of LiveMessage Messaging products for Service Cloud. Recipient of the Salesforce T&P President Award.

### Distinguished Member of Technical Staff @ Verizon Wireless
Jan 2006 – Jan 2015
•	Sole lead in performance engineering for Award Winning large scale mobile products
•	Application framework architecture design
•	All-stacks performance tuning on everything that involves logic processing, data processing and transportation, including Java code level tuning, JVM tuning, SQL tuning, TCP stacks tuning, OS tuning etc.
•	Load simulator development for anything flows over TCP/IP
•	Performance data analysis, large scale software product deployment sizing
•	Systems integration, production deployment

### Sr. Systems Engineer @ Vodafone
Jan 2001 – Jan 2006 | Walnut Creek
Team lead in performance engineering

### Sr. Software Engineer @ e-Force
Jan 2000 – Jan 2001
E2E Java framework architecture design.

### Sr. Consultant @ FMR, Fidelity Investments
Jan 1995 – Jan 2000
Systems integration and administration. Software development for mission-critical market data applications.


## Education
### MS in Computer Science
Northeastern University

### BS in Mechanical Engineering
University of Shanghai for Science and Technology

### Master of Science in Computer Science
Northeastern University


## Contact & Social
- LinkedIn: https://linkedin.com/in/sophia-xiaofeng-xie-9559a5

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Source: https://flows.cv/sophiaxiaofengxie
JSON Resume: https://flows.cv/sophiaxiaofengxie/resume.json
Last updated: 2026-04-12