Justas Balcas
Software Engineer at Energy Sciences Network (ESnet)
Naperville, Illinois, United States
Summary
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Rockstar🎓
Top SchoolJustas Balcas is a software engineer with 12 years of experience specializing in software-defined networking, HPC clusters, and scalable on-prem Kubernetes deployments for scientific workflows. Currently at ESnet, he designs the Site Resource Manager for the SENSE project and implements in-network data caching to accelerate large-scale scientific data transfers. Previously at Caltech and CERN he managed Tier-2 computing facilities, led Kubernetes migrations, and automated infrastructure with Puppet and Ansible while mentoring junior SREs. His background in NLP and data analysis early in his career gives him a practical edge in data-driven optimization and tooling. Based in Naperville, IL, he combines systems-level networking know-how with hands-on DevOps to prototype efficient, reliable solutions for research communities. He is known for translating complex distributed systems requirements into pragmatic, production-ready architectures.
12 years of coding experience
11 years of employment as a software developer
Master's degree, Information Technology, Master's degree, Information Technology at Vytautas Magnus University
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (101)
cms10
python10
fuse10
build-configuration10
fdt10
high-performance10
science10
kubernetes10
open-science10
container10
nfs10
storage10
java10
posix10
cloud-storage10
Programming languages (11)
Github contributions (5)
sdn-sense/sense-sonic-collection
Jul 2023 - Nov 2025
SENSE SONiC Ansible Collection
Contributions:8 PRs, 23 pushes, 9 branches in 2 years 4 months
sdn-sense/sense-dellos9-collection
Jun 2023 - Apr 2026
SENSE Dell OS9 Ansible Collection
Contributions:16 PRs, 33 pushes, 22 branches in 2 years 9 months
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