Calvin Kessler
Lead Data Engineer - Audience Delivery Platform
Chicago, Illinois, United States
Summary
👤
Senior🎓
Top SchoolCalvin Kessler is a Lead Data Engineer with 8 years of experience building high-throughput, cost-efficient data platforms for advertising at Epsilon, specializing in Spark, Databricks, and cloud migrations. He’s delivered measurable impact—cutting audience delivery times from days to hours and scaling pipelines to serve trillions of user attributes—while embedding CI/CD and observability directly into data workflows. Calvin combines deep engineering craft (custom Spark UDFs, Kafka Connect, Airflow DAG generation) with product-minded automation, having prototyped AI-assisted support via AWS Bedrock to speed incident triage. He’s comfortable bridging on-prem and cloud-native architectures, having led EMR and Databricks migrations that dramatically reduced activation latency. Outside of pipelines, he brings analytical rigor from academic research and a creative side as a musician, Brazilian jiu-jitsu practitioner, and part-time haiku writer—traits that surface in pragmatic, elegant engineering solutions.
8 years of coding experience
2 years of employment as a software developer
College of DuPageBachelor of Arts (B.A.) Economics, Bachelor of Arts (B.A.) Economics at University of Illinois Urbana-ChampaignMetea Valley High School
Stackoverflow
31reputation
169reached
1answer
1question
Github Skills (15)
jupyter-kernels8
kernel6
apache-spark6
hadoop-yarn6
docker6
jupyter-notebook6
gateway6
scala6
jupyter6
spark4
python4
apache3
kubernetes3
multi-tenant3
scalable3
Programming languages (1)
Github contributions (5)
McKalvan/secpy
Jan 2022 - Apr 2022
Contributions:8 releases, 11 commits, 7 pushes in 2 months
McKalvan/aoc_2022
Dec 2022 - Dec 2022
Contributions:12 pushes, 1 branch in 10 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.