# Sen Li

> Staff Software Engineer at LinkedIn

Location: Mountain View, California, United States
Profile: https://flows.cv/senli

I have 6 years experience in software development especially in building large scale distributed system and analytics system.

## Work Experience
### Staff Software Engineer @ LinkedIn
Jan 2022 – Present | Sunnyvale, California, United States

### Software Development Engineer II @ Amazon
Jan 2018 – Jan 2022 | Greater Seattle Area
Tech lead - Batch processing system:
·	Responsible to lead a team of 4 SDEs to build an offline analytics ETL application that takes customer event data, transforms it to joined and aggregated business metrics to be shown on an UI interface.
·	Designed a system architecture to batch process data, led communication with UX, business and dependency teams, and implemented data lake data ingestion and data publishing components.
·	The system will run analytics ETL jobs for 30k customers with 5.2GB/hour peak throughput.

Tech lead - Online low-latency analytics system:
·	Responsible to lead a team of 3 SDEs to build an online low-latency analytics application that ingests business metrics data from different data sources into an Elasticsearch and serves the data on the UI.
·	Designed the system architecture and the public API schema, implemented an Elasticsearch query builder which translates API requests to Elasticsearch queries.
·	The system serves UI reporting requests for 30k customers with 100M total document count, 55GB total data size, and 50 TPS.

Tech lead - re-architecture Amazon advertising reporting campaign placement reporting engine to reduce UI latency, improve scalability, improve development velocity and reduce hardware cost.
·	Responsible to lead a team of 2 SDEs to improve Amazon advertising UI online reporting latency and campaign placement index scalability, reduce hardware cost, and increase developer velocity.
·	Designed a re-architecture solution for existing Amazon advertising system, implemented new ETL job to create a new dataset, migrated five clients to the dataset and built test script to make sure the data consistency between new dataset and old dataset.

Tech lead - develop a offline report generation system for Amazon advertisers to allow them generate campaign performance report at daily granularity up to two years.

### Software Development Engineer I @ Amazon
Jan 2017 – Jan 2018 | Greater Seattle Area
Core developer - develop a feature to support campaign placement level reporting on Amazon advertising portal UI.

Core developer - develop a offline reporting scheduler which Amazon advertisers can use to schedule generating report in excel and CSV.


## Education
### Master’s Degree in Computer Science
Stony Brook University

### Bachelor's degree in Computer Science
Beijing University of Posts and Telecommunications


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

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