# Kun Zhou

> Infrastructure @ Sierra

Location: San Francisco, California, United States
Profile: https://flows.cv/kunzhou

I am an experienced software engineer with a background in database infrastructure and distributed systems.

## Work Experience
### Software Engineer @ Sierra
Jan 2025 – Present

### Software Engineer @ Airtable
Jan 2023 – Jan 2025 | San Francisco, California
I worked on both online and offline storage systems at petabyte scale. Here are some highlights:
- Led the productionalization of our first change data capture system built on Apache Flink
- Built a petabyte-scale MySQL-to-S3 archival system for cost-effective live serving
- Reduced MySQL replication lag from hours to sub-second
- Developed an automated pipeline for high-risk MySQL DDL migrations

### Software Engineer @ Stripe
Jan 2021 – Jan 2022 | South San Francisco, California
I worked on high availability initiatives on the merchant services team, here are some highlights:
- Resharded billions of records to mitigate projected cross-region query latency increase in preparation of a multi-regional active-active setup
- Reduced $1.3M in annual AWS costs by right-sizing key MongoDB clusters
- Created a data access library to transparently migrate queries to a new, highly-available data plane

### Software Engineer @ WePay
Jan 2019 – Jan 2021 | Redwood City, California
I worked on the merchant onboarding team, here are some highlights:
- Built a session-based onboarding microservice using Kafka, Cassandra, and gRPC
- Reduced local microservice build times by 80% with incremental Gradle builds
- Migrated multi-factor authentication to a new Java microservice

### Software Engineering Intern @ WePay
Jan 2018 – Jan 2018 | Redwood City, California

### Software Engineering Intern @ REalyse (UK)
Jan 2018 – Jan 2018 | London, United Kingdom


## Education
### Bachelor of Arts in Mathematics
Skidmore College

### Visting Undergraduate Student in Mathematics
The London School of Economics and Political Science (LSE)


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

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Source: https://flows.cv/kunzhou
JSON Resume: https://flows.cv/kunzhou/resume.json
Last updated: 2026-04-11