# Ruotian Wang

> Engineer

Location: Bellevue, Washington, United States
Profile: https://flows.cv/ruotian

## Work Experience
### Senior Software Engineer @ DoorDash
Jan 2024 – Present

### Software Engineer @ DoorDash
Jan 2022 – Jan 2024 | Seattle, Washington, United States
@ Foundation Data - Data Storage

### Software Development Engineer II @ Amazon Web Services (AWS)
Jan 2020 – Jan 2022

### Software Development Engineer @ Amazon Web Services (AWS)
Jan 2019 – Jan 2020 | Greater Seattle Area
@AWS Amazon Fraud Detector - AutoML

● Joined team when service in private Beta, worked with team to make it launch in 2019 re:Invent.

● Leading S-Goal project: launching Account-Take-Over model type in 7 regions. Re-architected container-based enrichment system into SDK based sub-system; Re-architected aggregation during inference from Apache Flink based into Lambda based data ingestion system.

● Leading S-Goal project: launching Transaction-Fraud-Insignt model type in 7 regions. Designed and implemented Data Lake and query engine to generate model training raw data; Lead and passed AppSec review; Owned SDK release process.

● Tech lead to make Amazon Fraud Detector service PCI-ISO compliance.

● Tech lead to design and implement Scientist Experimentation Platform to support troubleshooting customer facing issue without eyes-on customer data.

### Software Development Engineer @ Amazon
Jan 2018 – Jan 2019 | Seattle, Washington
@Amazon Prime - AutoTargeting

● Designed and implemented offline data processing pipeline using PySpark with ability to process 200MM+ records, and generated segment level model performance results used inside WBR report.

● Built automation pipeline for data loading and reporting jobs, set up Tableau WBR report to review clients' model performance.

● Built rule-based automating selection tool to reset WW 200+ marketers' experiment baseline so that all experiments have incremental performance.

● Implemented offline simulation tool and reduced 80% time to evaluate performance of different feature generator methods (Raw, Prime2Vec, XGBoost) combined with several scoring algorithms (BLIP, BLR).

### Teaching Assistant @ Northeastern University
Jan 2018 – Jan 2018 | Greater Seattle Area
Teaching assistant of INFO 7390 Advanced Data Science (Professor: Ebrahim Nasrabadi)

### Software Development Engineer Intern @ Amazon
Jan 2017 – Jan 2017 | Greater Seattle Area
@Amazon Prime - AutoTargeting

● Built a one stop portal (corporation scope) for onboarding new business groups from outside Prime team to use Multivariate machine learning model in a self-service manner and setting up experiments (configuring to enable both online simulation and offline training)

● Configuration service framework design: use ARest to build a RESTful service provider; React and Redux to design front-end based on Flux architecture principal; DynamoDB to provide storage solution

### SAP Data Warehouse Intern @ Accenture
Jan 2014 – Jan 2015 | Tianjin Bunge
●  Coordinated with US/India/China/Singapore teams to develop consolidated BW reports(containing MM, SD, FI, GTM, Future Trading) using SAP software. 

●  Shortened the existing half-day' reporting delay time to less than 2 hours, contributed to higher visibility of business running and promoted reaction to external future trading.

●  Gathered requirements, data modeling in BW, designed and developed ETL, developed Query.

### Data Analyst Intern @ Wandou Labs
Jan 2013 – Jan 2014 | Tianjin City, China
●  Responsible for the promotion and marketing of Wandoujia Product, including making relative marketing plans, in Tianjin area.

●  Successfully squeezed another competitor named 91 Cell phone Assistant out of Tianjin market, established a dominant position in locale.

### IT Support Intern @ China National Petroleum Corporation
Jan 2011 – Jan 2012 | Tianjin City, China
●  Responsible for assisting the HR Manager in dealing with some daily affairs, especially the construction of ERP deployment about employees’ information. 

●  Improved my practical ability of database related knowledge.


## Education
### Master’s Degree in Master of Science(MS), Information System
Northeastern University
Jan 2016 – Jan 2018

### Bachelor’s Degree in Management Information Systems, General
Nankai University
Jan 2011 – Jan 2015


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

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