Work Experience

Notion

Staff Product Security Engineer · - Present

2025: A very critical security-infra-product related project that can boost Notion's competitiveness for super large customer.

Staff Infra Engineer · -
  • 2024: Project leader that makes Notion scalable with world-wide data centers
  • 2023H2 Data Migration SME: Creator of a widely adopted data migration framework that more than 30 projects adopted and millions rows migrated per month
  • 2023H1 Datastore SME: Setup and improve datastore SLA by Postgres-PgBouncer-pgpool isolation

Peloton Interactive

Site Reliability Engineering Manager · -
  • Hands-on TLM: Managed enterprise SRE team of 7 direct reports and 2 offshore teams supporting AWS cloud engineering
  • Assisted Amazon B2B platform launch on 2022-08-24 that boosted stock price by 20.36%. Implemented SAP ERP system integrating with various vendors
  • Established company-wide standards on S3/SFTP data ingestion and HTTP custom headers
  • Established org-wide prod/dev data separation practice and team SLA with intake process
  • Experienced with SOX GDPR compliance in pre-IPO organization
Senior Data Engineer / Infra Pod Lead · -
  • Data Infra Pod Lead: Built ETL and data lake streaming solution with: Kubernetes/EMR/Airflow/Hudi/Spark/DBT/data catalog
  • Airflow Kubernetes Migration: Migrated all 200+ ETL jobs / data pipelines to Airflow on Kubernetes with 34 developers onboarded without business interruption
Senior Software Engineer · -
  • Kubernetes Migration Observability Leader: Migrated the whole backend service from EC2/ECS to Kubernetes without downtime. Worked with 50+ engineers to ensure metric/trace/sentry/logging pipeline/datadog mcrouter agent consistency
  • ORM Storage Migration: Led 4 people to migrate ORM's underlying storage from Redis to 66 Postgres tables without downtime

Facebook

Production Engineer (Messenger) · -

Messenger Messaging Infrastructure: Responsible for monitoring and live troubleshooting the world class highly scalable and reliable pub/sub system powering Messenger, encompassing storage and caching, realtime message routing and delivery, and messaging endpoints for browsers and mobile devices.

Uber

Infrastructure Engineer · -
  • Part of Uber's observability infra group that powers metrics collection/ingestion/storage to monitoring/alerting
  • Built Uber's "Datadog/Pagerduty" that supports 100k alerts with multi-region setup
  • Migrated the first micro-service from Uber to public cloud (DNS/load balancer/tcpdump ngrep Wireshark/CSRF attack/OAuth OneLogin integration)

LinkedIn

Site Reliability Engineer Intern · -

Linux Perf FlameGraph Streaming System: Streaming Linux CPU performance profile FlameGraph all the way to frontend UI

Jiepang.com / Guohe Ad

Backend Engineer / Lead Database Administrator · -
  • Migrated 50M photos metadata from MongoDB to MySQL with 0 downtime.
  • Migrated 50M photos actual data with a high performance file replication service in C (uses Linux syscall inotify and epoll).

Nomura Research Institute

System Engineer · -
  • Managed 7-Eleven’s IT infra include: Apache, DNS, DHCP, Squid, Mail, Sphinx.