# Tommy Li

> Senior Software Engineer at ClickHouse

Location: Seattle, Washington, United States
Profile: https://flows.cv/tommyli

## Work Experience
### Senior Software Engineer @ ClickHouse
Jan 2024 – Present | Seattle, Washington, United States

### Senior Software Engineer @ Brex
Jan 2022 – Jan 2024 | Seattle, Washington, United States
I worked on the Data Storage team at Brex, managing the company's hundreds of Postgres databases running on AWS RDS. I spearheaded a multi-quarter project to binpack our massive database fleet, ultimately yielding a 40% reduction in cloud costs. 

I also built fully automated zero-downtime Postgres infrastructure migrations using Temporal, Go and Terraform, which enabled the team to perform hundreds of toil-free major version upgrades on our largest scale databases.

### Database Reliability Engineer @ Datadog
Jan 2021 – Jan 2022 | Seattle, Washington, United States
I worked on the Database Reliability team for Postgres, where I led the development of Postgres on Kubernetes as a database platform. I took this from ideation to production, where it eventually served a number of high throughput production clusters with lower latency and higher availability than our previous cloud provider-managed databases. This was received by company leadership as the future of Postgres at Datadog.

I also worked on tooling and infrastructure to manage massive scale Postgres clusters deployed across multiple regions in AWS, GCP and Azure.

### Senior Software Engineer @ Coffee Meets Bagel
Jan 2019 – Jan 2021 | Greater Seattle Area
I planned and executed a series of projects to improve the reliability and cost efficiency of CMB's database systems. This included major infrastructure migrations and upgrades of Postgres (9.6 to 13), Elasticsearch (2 to 7) and Redis (4 to 6).

Later I was promoted to the technical lead of the backend platform team. I was heavily involved in hiring and project planning, and I mentored several teammates.

### Software Engineer @ Microsoft
Jan 2018 – Jan 2019 | Bellevue, Washington
I worked on Baja, the distributed database/pubsub layer of Cosmos (not CosmosDB), Microsoft's internal big data platform. I also helped drive adoption of Spark, Kafka and other open source systems across the Bing org.

### Software Developer Co-op @ Wave HQ
Jan 2015 – Jan 2016 | Toronto
I worked on the Accounting product where I shipped features across the full stack including bulk actions, multi-currency accounting, and various financial statements.


## Education
### H.B.Sc in Computer Science
University of Toronto
Jan 2012 – Jan 2017


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

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