# David Rozenfeld

> Senior Software Development Engineer at AWS Aurora

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

## Work Experience
### Senior Software Development Engineer @ Amazon Web Services (AWS)
Jan 2024 – Present | Palo Alto, California, United States
Aurora DSQL Query Processing Team

- Leading internal and external observability initiatives, including customer facing cluster metrics, billing and metering, and end to end internal query tracing and monitoring
- Designed and implemented user facing limits for private and public preview product

### Senior Software Development Engineer @ Amazon Web Services (AWS)
Jan 2021 – Jan 2024 | Palo Alto, California, United States
Aurora MySQL Database Kernel Team

- Helped launch AMS 3.0 - a MySQL 8.0 compatible version of Aurora MySQL. Responsible for transaction layer implementation of AMS 3.0 - communication between db engine and storage layer for transaction processing.
- Designed, implemented, and delivered Active Directory Authentication for Aurora MySQL.
- Security lead - CVE analysis and implementation, implementing proactive security measures, federal security compliance
- Designed, prototyped, and implemented vector data type prior to open source community

### Software Development Engineer II @ Amazon Web Services (AWS)
Jan 2019 – Jan 2021 | Palo Alto, California, United States
Aurora MySQL Database Kernel Team

- Designed, implemented, and delivered inplace major version upgrade feature
- Implemented new security model for AMS 3.0 - leveraging new MySQL 8.0 roles feature
- Delivered currency of MySQL 8.0.22 and 8.0.23 for AMS single-handedly

### Software Development Engineer @ Amazon Web Services (AWS)
Jan 2017 – Jan 2019 | Palo Alto, CA
Aurora MySQL Database Kernel Team

- Designed, implemented, and delivered distributed DDL query capabilities for Multi-Master project
- Helped launch Aurora MySQL 2.0 - a MySQL 5.7 compatible version of Aurora MySQL

### SDE Intern @ Amazon Web Services (AWS)
Jan 2016 – Jan 2016 | Palo Alto, CA
Aurora MySQL Database Kernel Team
- Developing high performance geospatial query processing for Aurora’s relational database engine
- Researched existing geospatial implementations using z-order indexes
- Optimizing a generic z-order index algorithm to achieve better performance than standard MySQL running on the same hardware

### Software Engineering Intern @ Sighten, Inc.
Jan 2016 – Jan 2016 | San Francisco, CA
- Developed infrastructure for new roles and permissions in Sighten’s user management system 
- Created new data models to manage costs on a per-quote basis and implemented services to communicate with a REST API
- Implemented a user interface for organization administrators to manage costs in the quoting process
- Wrote end-to-end tests for new user interfaces using Protractor
- Technology stack: HTML, Javascript (Angular, Protractor), Python (Django), PostgreSQL, Jenkins CI

### Research Assistant @ Dartmouth College Department of Computer Science
Jan 2015 – Jan 2015 | Hanover, NH
- Worked on the interdisciplinary multi-university Trustworthy Health and Wellness Project (THAW): a project aiming to improve security and privacy in health and wellness software
- Reverse engineered two wired medical devices to communicate with a Linux embedded system to securely broadcast data over wifi to a database endpoint

### Software Engineering Intern @ Kahuna, Inc
Jan 2014 – Jan 2014 | Palo Alto, CA
- Developed and documented new features for the Kahuna Mobile Engagement Engine, upgraded the product to support iOS 8
- Optimized product performance by implementing multi-threading in the SDK
- Worked with the backend team to develop new protocols for client-server communication 
- Developed automated feature and performance tests 
- Worked with customers onsite and remotely to help integrate Kahuna SDK into their applications

### Designer and Developer @ MakeSchool
Jan 2012 – Jan 2014 | Palo Alto
- Designed and developed the entire game from the front-end interface to the back-end integration
- Created in-app marketplace for real-money transactions to allow purchases of virtual currency for the game’s upgrade system
- Designed and implemented custom particle effects and proprietary physics engine for all character interactions 
- Implemented features such as global leaderboards and Facebook integration to add social incentives to the game

### Software Engineering Intern @ Duck Duck Moose
Jan 2013 – Jan 2013 | San Mateo
- Extended DDM’s cross-platform game development framework with classes built on top of Apple’s UIWebView and MoviePlayer to support in-app web page viewing and video streaming
- Rewrote a script that extracts images from individual layers in Photoshop files to achieve a 50% performance gain
- Made company’s entire app catalog iPhone 5 compatible

### Research Intern @ Stanford University
Jan 2012 – Jan 2012 | Stanford
- Reviewed up-and-coming gaming technologies, studied the psychology and business models behind successful games
- Synthesized this information to create an assessment of the trajectory of the gaming industry through 2020

### Engineering/Marketing Intern @ Xpert Financial
Jan 2011 – Jan 2011 | San Mateo
- Created webpages with interactive graphs to keep track of company’s revenue and deal flow
- Cross-referenced client data in Salesforce with companies’ websites to create investor prospect lists

### Web Application Development Intern @ Xpert Financial
Jan 2010 – Jan 2010 | San Mateo
- Created a currency converter supporting 86 currencies using proprietary JavaScript kits and XML
- Wrote PHP scripts to update the currency converter daily using an Oanda Exchange Rate Feed for data retrieval


## Education
### B.A. in Computer Science, Economics
Dartmouth College

### Menlo School


## Contact & Social
- LinkedIn: https://linkedin.com/in/davidrz
- Website: http://bit.ly/mgwukkw

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