Charles Guertin
Senior Site Reliability Expert at Lightspeed Commerce
Montreal, Quebec, Canada
Summary
🤩
Rockstar🎓
Top SchoolCharles Guertin is a Senior Site Reliability Expert based in Montreal with nine years of experience building and operating cloud-native systems, specializing in Go, Kubernetes, and AWS. He’s driven measurable cost and reliability improvements—resizing production clusters and leveraging Karpenter to cut EC2 spend by 25%, reserving RDS Graviton instances to save thousands, and implementing 99.9% SLOs. Charles automates critical operations (RDS blue/green upgrades, DR backup restores, Kafka admin tasks) and contributed company-wide Go concurrency guidance as part of a Golang steering committee. He pairs hands-on incident response experience with teaching DevSecOps assignments, showing an ability to translate production lessons into practical learning. Notably, his blend of engineering rigor and cost-conscious automation makes him as effective at reducing cloud bills as he is at raising availability.
9 years of coding experience
6 years of employment as a software developer
Bachelor's degree Software Engineering, Bachelor's degree Software Engineering at École de technologie supérieureTechnique Informatique de Gestion, Technique Informatique de Gestion at Collège Lionel-Groulx
French, English
Stackoverflow
23reputation
2kreached
0answers
1question
Github Skills (191)
statefulset10
terraform10
security10
argocd10
declarative10
cloud-native10
k8s10
operator10
monitoring10
go-client10
charts10
kubernetes-cluster10
kustomize10
continuous-delivery10
trigger10
Programming languages (19)
Github contributions (5)
cguertin14/k3supdater
Mar 2022 - Mar 2024
Updater (similar to Renovate Bot) for k3s ansible playbook versions.
Contributions:52 PRs, 84 pushes, 11 branches in 2 years 1 month
renovate-botsimilarrenovateansiblebot
cguertin14/cguertin.dev
Mar 2021 - Jan 2025
Source code for cguertin.dev
Contributions:4 releases, 1 review, 23 PRs in 3 years 10 months
patchhugodevmingw-w64
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