Stathis Karatsiolis
@stathiskaratsiolis
I build crash-safe distributed storage systems, metadata workflows, and cloud-scale reliability improvements.
United StatesWhat I'm looking for
At Nasuni, I build distributed storage systems that make large-scale retention, pruning, metadata migration, and object-storage workflows safer and faster. I moved multi-day snapshot-retention pruning to same-day cloud execution and reduced observed leaked data by 95% through failure-tolerant object-storage garbage collection.
Previously, I worked on Amazon EFS distributed metadata and led full-stack development for NoiseScore. I enjoy debugging complex filesystem failures, building durable recovery paths, and using C++, Python, PostgreSQL, and AI-assisted workflows to deliver validated fixes.
Experience
Work history, roles, and key accomplishments
Senior Software Engineer
Nasuni
Jan 2024 - Present (2 years 8 months)
Moved snapshot-retention pruning to same-day cloud execution using a C++17 state machine and PostgreSQL checkpoints. Implemented provider-failure-tolerant object-storage GC and delivered live PostgreSQL metadata migrations with zero downtime.
Software Engineer
Nasuni
Jan 2021 - Dec 2024 (3 years 11 months)
Diagnosed and resolved intermittent C++ bugs in distributed filesystem workflows and expanded automated test coverage with over 100 unit and integration tests. Authored debugging handbooks and RCA playbooks for distributed storage.
Implemented Java data structures and algorithms for failure-scenario handling in Amazon Elastic File System's distributed metadata layer. Built Python automation tooling for deployment and service-management workflows.
Backend Developer
BU Spark / BU Sail
Jan 2019 - Dec 2020 (1 year 11 months)
Led backend integration and product development for NoiseScore, a React Native mobile app for urban noise monitoring, delivering full-stack ownership from design through App Store release.
Education
Degrees, certifications, and relevant coursework
Boston University
Master of Computer Science, Computer Science
Master of Computer Science with specialization in Data Centric Computing from Boston University, completed in January 2020.
National and Kapodistrian University of Athens
Bachelor of Computer Science, Computer Science
Bachelor of Computer Science from the National and Kapodistrian University of Athens, completed in July 2018.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Salary expectations
Job categories
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