Karolis Kalantojus
Software Development Engineer at Amazon Web Services (AWS)
Vilnius, Vilnius County, Lithuania
Summary
👤
Senior🎓
Top SchoolKarolis Kalantojus is a pragmatic Software Development Engineer with 11 years of experience designing and shipping cloud-native automation and operational tooling, currently driving reliability and scale at AWS from Vilnius. He blends deep hands-on engineering in Python, JavaScript and SQL with fluency in languages like Go, Rust and Elixir when the problem demands it, favoring simple, auditable solutions over complexity. At AWS he built services that saved thousands of engineering hours—reducing region build times from weeks to hours, cutting fleet update effort by thousands of hours, and turning a 30-minute regional health check into a 2-second operation. He routinely applies TDD, CI/CD, observability, and deployment patterns (canaries, fractional deployments, automated rollbacks) to de-risk production changes and improve security posture. Comfortable leading small cross-functional teams, he also mentors peers, runs internal tooling projects that become team standards, and volunteers as a security guardian to elevate organizational practices. With a background in applied physics and optical systems, he brings a rare combination of scientific rigor and practical systems engineering to complex distributed problems.
11 years of coding experience
10 years of employment as a software developer
Master's degree Laser and Optical Technology/Technician, Master's degree Laser and Optical Technology/Technician at Vilniaus universitetas / Vilnius University
Github Skills (171)
python10
odoo10
recovery10
web-automation10
erp10
django10
docker-compose10
golang10
management10
multi-process10
checksum10
gzip10
docker10
behave10
docker-image10
Programming languages (5)
Github contributions (5)
versada/misc-addons
Jun 2018 - Jan 2020
Miscellaneous Odoo addons
Contributions:2 PRs, 3 pushes, 2 branches in 1 year 7 months
pythonodoomiscellaneouserpaddons
kkarolis/ctshed
Mar 2019 - Mar 2019
Contributions:32 commits, 23 pushes, 2 branches in 2 days
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