# Ethan Z.

> Senior Software Engineer @ Google | Ads Safety & Experience, Infrastructure

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

Senior SWE with over 5 years of experience at Google in Ads Safety and Payments, complemented by prior roles at Meta and Intel  (total YOE: 10). Expertise in architecting and delivering large-scale distributed systems(handling up to six‑figure QPS), RAG/context learning, LLM / ML infrastructure, and driving cross-functional initiatives to enhance advertiser experience, combat abuse, and ensure policy compliance. Key areas of impact include advertiser certification, account enforcement, real-time policy review.

Languages: C++, Java, Python, SQL, GCL, Javascript (React, Dart), Hack/PHP, Erlang.
Infrastructure: 
Google: Borg/Kubernetes, Protobuf, Flume, Spanner, Knowledge Graph, TFlex/TFX, Apres/Pub&Sub, Cdpush. 
Meta: Hive/Presto, Thrift (RPC API),TAO(Graph DB), GraphQL.
Domains: Distributed Systems, ML/LLM Infra, Full-stack, Policy Enforcement & Certificate & Experience, Ads Safety/Integrity.

## Work Experience
### Senior Software Engineer @ Google
Jan 2020 – Present | San Francisco Bay Area
Ads Safety (May, 2021 - Present)
• Key areas of impact of leading & founding, include advertiser certification, account enforcement, real-time policy review. 

Google Pay (Jul, 2020 - May, 2021)
• Designed and landed the Instant Checkout Preauth feature in Android GMS Core to improve seamless checkout experiences.
• Implemented secure, vendor-agnostic data exchange for the Courier Service in the Google Pay App, supporting all Google Pay/Wallet card-linked offers.

### Full-Stack Software Engineer @ Meta
Jan 2018 – Jan 2020 | San Francisco Bay Area
• Ads Credits & Financial Planning: Developed web applications for Ads Credits Planning & Reporting ($xxB+), including, ledger and reconciliation service, data injection pipeline from 3rd broker (xxxM entries), chatbot, dashboards and automated coupon code delivery. (Stack: Hack, React, GraphQL, Java, Presto/Hive, Thrift, Graph Database)
• WhatsApp Registration: Implemented an Erlang backend service to crawl and remove orphan accounts.

### Software Modeling Engineer @ Intel Corporation
Jan 2015 – Jan 2018 | San Jose
• Developed CAD tools in C++ for modeling RTL, netlist, and mixed-signal systems within the Quartus software suite.
• Integrated Cadence Virtuoso API to extract millions of nodes and implemented event-driven algorithms for post-synthesis netlist co-simulation for Serdes components.

### Teaching Assistant @ Columbia University in the City of New York
Jan 2014 – Jan 2014 | Greater New York City Area
Served as TA for two courses, E4321 Digital VLSI Circuits by Prof. Shepard and E4312 Analog Electrical Circuits by Prof. Dickson.

### Research Assistant @ Columbia University in the City of New York
Jan 2014 – Jan 2014
• Participated in the research of Quadrature Analog-to-Information Converter System for spectrum scanner supervised by Prof. Kinget.
• Set up Virtex-7 FPGA measurement environment by writing Verilog/VHDL for the driver of ADC FMC116 board and MATLAB for data processing. Modified application programming interface (API) and programmed in C/C++ for configuring board.


## Education
### MS degree in Electrical Engineering
Columbia University

### Bachelor's degree in Electrical and Electronics Engineering
Harbin Institute of Technology


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

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Source: https://flows.cv/ethanz
JSON Resume: https://flows.cv/ethanz/resume.json
Last updated: 2026-03-22