Calvin Barker
Experience
Software Engineering Manager
January 2023
— February 2026
Rokt
Manager of Identity; previously led Customer & Client Data and Auth
- Owned Customer Identity for Rokt's transaction-time ads network, delivering real-time identity resolution at p99 <50 ms latency requirements.
- Integrated Experian and other third-party data sources into the session pipeline (~6K RPS), improving identity resolution and ML signal quality and contributing to an approximate 6% YoY lift in value per transaction.
- Stabilized core identity infrastructure by formalizing on-call, defining DRIs, and introducing clear operational swimlanes, reducing weekly pages by ~90% (50+ to ~5) while supporting continued traffic growth.
- Led the migration from a bespoke JWT-based auth system to Auth0, enabling SSO and MFA, accelerating advertiser and client onboarding, and materially reducing auth-related production incidents.
Software Engineer
February 2021
— January 2023
Google
Engineering Productivity (EngProd) in Google Cloud Platform
- Conceived and built a Go load testing tool to trigger three-day-long mass creation events of 50M encryption keys for regular system capacity verification that helped unblock a Google Cloud deal valued at $1.1B
- Instituted an integration testing suite that decreased load test complexity by 90% per project by reducing the required number of files from 40+ to four and the average code line count from 4324 to 430
- Co-orchestrated a 253-team pilot of a code quality framework to enforce best-practice metrics that led to adoption across all 3000+ teams in Google Cloud
Senior Software Engineer
August 2019
— January 2021
Foundry.ai
- Architected a multi-tier data lake using AWS S3, Glue, Athena/Presto, and Terraform that trimmed data scientists' toil for machine learning model development from over a week to under 10 minutes
- Initiated a serverless ETL pipeline using AWS Glue, Spark, and Delta Lake that lowered data latency from four days of manual work to 30 minutes and associated monthly cloud costs from over $20,000 to $3,000
Senior Data Engineer
July 2017
— August 2019
Capital One Financial Corporation
- Spearheaded production efforts for a new microservice-based credit review product that complied with complex internal quality standards and enabled production deployments of changes within 20 minutes
- Engineered a data-detection application with Spark to replace an underperforming vendor product that increased daily throughput from 1.5 TB to 30 TB while decreasing the average cost per TB from $532 to $2.88
- Redesigned AWS infrastructure for a critical data-scanning stack that implemented automatic scaling and cut disaster recovery time and point objectives from three hours to under 30 seconds
Education
The Georgia Institute of Technology
August 2019
— May 2022
Master of Science in Computer Science
The University of North Carolina at Chapel Hill
August 2013
— May 2017
Bachelor of Science in Computer Science & Economics
Publications
Container assembly with electronic transaction component
June 2020
U.S. Patent No. 11375833 (granted July 2022).
Skills
Software Engineering:
Go, Python, TypeScript, Java, Scala
Data Systems:
PostgreSQL/MySQL, Snowflake, Spark, Delta Lake
Platform & Infrastructure:
AWS, Terraform, EC2, ECS, Lambda, IAM, Docker, CI/CD, Monitoring & Observability (Datadog)
Engineering Leadership:
Team Building, People Management, Cross-functional Alignment, OKRs, Hiring & Mentorship, Performance Management