# Dan Zhao

> Software Engineer at TikTok.

Location: Berkeley, California, United States
Profile: https://flows.cv/danzhao

## Work Experience
### Senior Software Engineer @ TikTok
Jan 2024 – Present | San Jose, California, United States

### Software Engineer @ TikTok
Jan 2020 – Jan 2024 | Mountain View, California, United States

### Software Engineer, Data @ Hygiena
Jan 2020 – Jan 2020 | California, United States

### Data Engineering Fellow @ Insight Data Science
Jan 2020 – Jan 2020 | San Francisco Bay Area
− Developed a user analysis platform which detects popular origins/destinations of taxi and sharing bike trips to/from transportation hubs in New York and provides a comparison between current and historical data
− Built a batch processing pipeline to ingest >300 GB historical trip data and transportation related data, preprocess and perform computation with Spark, store the aggregated results in PostgreSQL with PostGIS extension, and finally use Dash to provide a map-based information query UI and visualize query results
− Designed a data ingest tool that identify a general schema and allow data in various schema to be ingested and converted through Airflow into the platform without recoding

Please check the following link for more information: https://github.com/danzhaozju/insight

### Undergraduate Research Assistant @ Zhejiang University
Jan 2016 – Jan 2018 | Hangzhou, Zhejiang, China
Study on Performance of Countercurrent Bioelectrode Nitrogen Removal System (12/2017-05/2018)
- Consturcted the reverse seepage bioelectrode system by reversing the substrate flow in MFC.
- Meatured the removal rate and load of nitrogen pollutants, to evaluate the denitrification performance.
- Adopted the cyclic voltammetry curve, to examine the electrochemical activity and energy recovery potential of the bioelectrode.
- Revealed that the functional microorganisms and metabolic characteristics are the critical factors that determined the enrichment of electrotrophic microorganisms from inocula and the performance of bio-cathode denitrification

Effects of Inoculum on the Performance of Bio-cathode Denitrification (04/2016-05/2017)
- Developed the specific research plan and designed the experiment based on the independent study of bioelectrode denitrification mechanism and bacteria metabolic characteristics.
- Measured the utilization rate and slew rate of the substrate, nitrate and bicarbonate to identify the nitrogen removal performance of inoculum under no electron donor circumstance.
- Adopted gravimetric determination method to obtain the weight of the denitrification, denitratation, and anammox electrode; calculated and compared the growth rate and biomass production.
- Analyzed the influence mechanism of inoculum on bioelectrode nitrogen removal performance and the reasons behind the differences in nitrogen removal performance.
- Published a paper and received two national patents.

Attenuation Effect of Alkalization by Bio-cathode Denitrification and Its Mechanism (05/2017-07/2017)
- Designed the bioelectrochemical denitrification reactor and heterotrophic denitrification reactor.
- Explored the influence of substrate concentration on the attenuation effect of alkalization by bio-cathode denitrification.
- Damaged the cell membrane structure in a high pH environment to study the changes of membrane properties under the condition of high alkalinity.


## Education
### Master of Science - MS in Civil and Environmental Engineering
University of California, Berkeley
Jan 2018 – Jan 2020

### Bachelor's degree in Environmental Engineering
Zhejiang University
Jan 2014 – Jan 2018


## Contact & Social
- LinkedIn: https://linkedin.com/in/dan-zhao123

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Source: https://flows.cv/danzhao
JSON Resume: https://flows.cv/danzhao/resume.json
Last updated: 2026-03-23