Babis Chalios
Platform Engineer
Barcelona, Catalonia, Spain
Summary
🤩
Rockstar🎓
Top SchoolBabis Chalios is a platform engineer with 8 years of experience building secure, low-level infrastructure for cloud and edge environments, currently working on sandboxing infrastructure for AI agents at E2B. His background spans research and industry roles at AWS, Barcelona Supercomputing Center, and Volta Networks, anchored by a PhD in Computer Science from Queen’s University Belfast. He has hands-on expertise in microVMs and systems security, contributing to Firecracker by refactoring GIC support, hardening VirtIO networking behavior, and adding thorough unit and integration tests. Comfortable across research and production contexts, he blends deep systems knowledge with practical engineering to deliver resilient, test-covered platforms. Based in Barcelona, he brings a subtle research-driven rigor to platform reliability and attacker-aware design that often surfaces as protocol- and hardware-aware fixes before they hit production.
8 years of coding experience
8 years of employment as a software developer
Doctor of Philosophy (PhD) Computer Science, Doctor of Philosophy (PhD) Computer Science at Queen's University BelfastDiploma Electrical and computer engineer, Diploma Electrical and computer engineer at National Technical University of Athens
Greek, English
Stackoverflow
1reputation
0reached
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Github Skills (11)
it-security10
low-level10
firecracker10
kvm10
low-level-programming10
rust10
system-programming10
virtualization10
security10
acpi9
device-driver9
Programming languages (10)
Github contributions (5)
firecracker-microvm/firecracker
Sep 2019 - Jan 2023
Secure and fast microVMs for serverless computing.
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:1 release, 1128 reviews, 49 commits in 3 years 4 months
Contributions summary:Babis primarily contributed to enhancing the Firecracker microVM project, focusing on the implementation and improvement of low-level system components. They added support for GICv2 and its interrupt controllers by refactoring the GIC-related code to define a GICDevice Trait, allowing for the introduction of various GIC versions, including GICv2 and GICv3. Additionally, the user addressed and mitigated security vulnerabilities by making versions v1.0.0 and v1.1.0 incompatible with each other when VirtIO net device uses notification suppression. Furthermore, the user implemented and integrated a series of unit and integration tests to increase the overall project code coverage, covering aspects of networking, snapshotting, and system security.
containerssecureminimalistrustserverless
cloudkernels/firecracker
Aug 2019 - Jul 2021
Secure and fast microVMs for serverless computing.
Contributions:30 commits, 11 PRs, 127 pushes in 1 year 11 months
secureserverlessmicrovmscomputingserverless-computing
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