# Sa Yang

> Software Engineer

Location: Cupertino, California, United States
Profile: https://flows.cv/sa

• Software engineer with 11 years of experiences in design and development of large-scale distributed systems, expertise spans on various aspects of software architect, implementation and testing. 
• Domain owner and team player with strong interpersonal skills, rapid learner who thrives in a fast‐pace environment.

## Work Experience
### Founding Engineer @ Reevo.ai
Jan 2024 – Present | California, United States

### Software Engineer @ OpenStore
Jan 2022 – Jan 2024 | San Francisco Bay Area

### Staff Software Engineer / Tech Lead @ DoorDash
Jan 2019 – Jan 2022 | Mountain View
• Founding engineer of Doordash New Verticals team, built highly scalable services for Convenience and Grocery orders at Doordash. 
• Lead the integration of very first set of convenience and grocery merchants to Doordash platform, helped Doordash dominated the US convenience delivery market under 8 months. 
• Designed and developed Doordash retail fulfillment engine, extended the Doordash picking models with Dasher pick and Shopper pick, added fulfillment flow to Doordash order life cycles,  serving millions of Dashers and Shoppers to shop and stage the groceries in-store.
• Lead variations of Merchant customized solutions, such as:
   - Merchant POS integration, Merchant tax calculation and order cart adjustments
   - UPC barcode processor
   - Weighted item fulfillment
   - Out of stock item substitutions

### Senior Software Engineer @ Apple
Jan 2014 – Jan 2019 | Cupertino
• Providing technical leadership, hands on designing and implementing across projects, oversaw architecture, availability and performance on highly scaled web service and applications.
• Collaborating with cross-functional dev teams, coordinated with QA and SRE teams, defined and implemented some of the core backend platform frameworks and systems that powers the next generation of iCloud services.
• Developed and managed highly scalable API and web applications that handle 300+ million transactions per day.
• Designed and developed distributed performance testing system, troubleshoot and resolve performance bottlenecks.

### Software Engineer @ Qualcomm (QES, Omnitracs )
Jan 2013 – Jan 2014 | Greater San Diego Area

### Software Engineer @ Startup
Jan 2012 – Jan 2013 | Los Angeles, California, United States
CityGrid Media, online media company that connects web and mobile publishers with local advertising organizations.

### Software Engineer @ Startup
Jan 2012 – Jan 2012 | Greater Los Angeles Area
Newman Infinite, a no-code AI platform for building data rich, one-off universally compatible software.


## Education
### Master of Engineering (M.Eng.) in Electrical and Electronics Engineering
University of Southern California

### Certificate in Engineering/Industrial Management
Stanford University

### Bachelor of Engineering (B.E.) in Electrical and Computer Engineering
Tianjin University


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

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