Helena Cho
Data Engineer
San Francisco, CA helena.cho@example.com +1 (555) 034-1014
Profile
Data engineer who ships trustworthy pipelines. Prefers clear contracts, tested transforms, and alerts that wake the right person.
Experience
Data Engineer
2021 – Present
Pipeline Commons · San Francisco, CA
- Rebuilt the nightly warehouse load, cutting failures from 12% to under 1%.
- Introduced data contracts that blocked breaking schema changes in CI.
- Reduced dashboard freshness lag from 6 hours to 45 minutes for revenue metrics.
Analytics Engineer
2018 – 2021
Bay Metrics · Oakland, CA
- Modeled 30 core tables used by finance and growth teams.
Skills
SQL · dbt · Airflow · Snowflake · Python · Data quality
Education
M.S. Data Engineering
2018
Bay Technical Institute
Projects
Contract Test Harness
Lightweight checks for schema drift before warehouse publish.