Seth Lumnah
Lead Software Engineer at Capital One
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolSeth Lumnah is an AWS-certified lead software engineer with 12 years of experience modernizing banking platforms and building resilient, event-driven microservices. At Capital One he led the customer profile orchestration and replacement of a legacy vendor service, delivering a data platform that saved over $1M annually without disrupting integrated systems. He is fluent in Go and cloud-native architectures—designing Lambda-based ingestion pipelines, tokenization subprocesses, and replay systems to validate new services against legacy behavior. A pragmatic builder and mentor, Seth has led cross-functional teams, onboarded Go developers, and scaled automation that dramatically increased throughput while cutting error rates. He pairs startup-era full-stack engineering (co-founding and shipping multiple microservices and payment integrations) with enterprise-grade delivery and cost-conscious design. Based in New York, he brings a mix of hands-on implementation, systems thinking, and operational discipline to complex data modernization challenges.
12 years of coding experience
19 years of employment as a software developer
Computer Science, Computer Science at Binghamton UniversityBachelor of Science Business Management, Bachelor of Science Business Management at Wright State University
English, Chinese
Github Skills (41)
localhost9
command-line-arguments8
chrome8
environmental7
sqrl7
linux7
firefox7
macos6
password-manager6
windows6
ios6
cryptography5
vault5
pods5
security5
Programming languages (2)
Github contributions (5)
sedalu/dotfiles
Feb 2022 - Dec 2024
Contributions:2 PRs, 3 pushes, 4 branches in 2 years 10 months
sedalu/goconfig
Mar 2019 - Jan 2022
Your configuration library for your Go programs.
Contributions:3 pushes, 2 branches in 2 years 10 months
golangenvironment-variablesconfigurationconfiguration-managementconfiguration-files
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