Leon Kessler
Principal Software Engineer at Westminster City Council
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolLeon Kessler is a Principal Software Engineer based in London with over 15 years of cross-industry experience delivering large-scale, Drupal-centric web platforms. He combines hands-on engineering with technical leadership—driving architecture, CI/CD, and dev-ops using Kubernetes, Helm, Terraform and AWS while mentoring teams and improving delivery processes. Leon has led complex multisite, multilingual and GDPR-sensitive projects for government and large charities, and repeatedly contributed back to the Drupal ecosystem through modules and themes. He excels at translating stakeholder needs into pragmatic technical designs, running workshops, and producing clear documentation that empowers teams. Notably, he has built decoupled Drupal/NodeJS architectures and integrated products like Akeneo, Dynamics and AWS Cognito in greenfield multisite builds. Comfortable both as an individual contributor and a cross-organisational spokesperson, he champions open source and working transparently.
11 years of coding experience
12 years of employment as a software developer
Diploma Web Design and Development, Diploma Web Design and Development at Qantm College
Github Skills (100)
cloud-platform10
drupal10
docker10
php10
dom-parser9
virtualbox9
go9
cli8
sdk8
perl8
freeradius8
portal8
javascript-client7
circleci7
jquery7
Programming languages (10)
Github contributions (5)
ministryofjustice/prisoner-content-hub-backend
Jan 2021 - Jan 2023
Drupal instance serving the prisoner facing hub
Contributions:83 releases, 75 reviews, 1085 commits in 1 year 11 months
servingprisoner-content-hubphpdockerdrupal
leonk/drupal-vm-pantheon
Dec 2015 - May 2016
Contributions:6 commits, 4 pushes in 5 months
drupalpantheon
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