Sean O'toole
Software Development Engineer IV at Capital One
Greater Derby Area United Kingdom
Summary
👤
Senior🎓
Top SchoolSean O'toole is a seasoned Software Development Engineer IV with 11 years of experience leading cloud-native transformations and delivery at Capital One, where he guides multiple agile squads and shapes platform-wide patterns for serverless deployments. He combines deep backend expertise in Java and Kotlin with practical frontend and infrastructure know-how, having migrated on-premise systems to microservices and pioneered serverless Lambda/S3 applications. A recognized communicator and award-winning presenter, Sean runs software craftsmanship sessions, mentors engineers across teams, and co-owns documentation initiatives that improve discoverability and developer onboarding. He also builds hands-on side projects—a planning poker app, team-building algorithm game, and an agile teaching site—showing a persistent focus on learning-by-doing and teaching practical TDD/BDD techniques. Unusually for an engineer, his background in counseling psychology informs his collaborative leadership and emphasis on knowledge-sharing cultures.
11 years of coding experience
9 years of employment as a software developer
Bachelor of Science (BSc) Counseling Psychology, Bachelor of Science (BSc) Counseling Psychology at University of Derby
Stackoverflow
4,314reputation
195kreached
30answers
3questions
android
top-5%
screen
top-1%
android-layout
top-1%
eclipse
top-5%
Github Skills (66)
testing10
screen10
gradle-plugin10
lambda10
versioning10
continuous-integration10
aws-lambda10
android-layout10
gradle10
aws10
semantic-versioning10
developer-tools9
python9
serverless9
eclipse9
Programming languages (8)
Github contributions (5)
development-and-dinosaurs/planning-poker
Nov 2023 - Jun 2024
Planning Poker application for agile refinement ceremonies
Contributions:10 releases, 88 PRs, 113 pushes in 6 months
agilekotlinplanning-poker
development-and-dinosaurs/gatling-lambda-extension
Jan 2020 - Jun 2022
A Gatling extension for invoking lambda functions
Contributions:7 releases, 54 commits, 47 PRs in 2 years 5 months
gatlinglambda-functionsserverlessaws-lambdainvoking
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