Calvin Barker
New York, US
calvinbarker1023@gmail.com

Experience


Software Engineering Manager
January 2023
 — 
Present
Rokt

Current manager of Identity; previously led Customer & Client Data and Auth

  • Integrated Experian data into Rokt's session pipeline (~6K RPS), boosting data quality and ML precision. Contributed to a broader ~6% YoY lift in value per transaction.
  • Stabilized Identity operational excellence by standardizing on-call, introducing DRIs and swimlanes, and aligning with VP-level stakeholders. Reduced on-call pages by 90% (50+ → ~5/week)
  • Migrated from a fragile, homegrown JWT system to Auth0, enabling SSO, MFA, and faster client onboarding. Used a SEV-1 to align 80+ engineers across all teams on modern architecture, reducing incidents and saving ~$2M/year in engineering capacity
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