# Dimitris Tsirogiannis

> Software Engineer at Snowflake

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/dimitristsirogiannis

I’m a technology leader and engineer with deep experience in databases, data management systems, and AI. Currently a Principal Engineer at Snowflake, I’ve previously built and scaled systems at AWS, Cloudera, and Microsoft. My work centers on solving complex data challenges, bridging research and product, and turning technical innovation into practical impact. I hold a PhD in Computer Science from the University of Toronto and am passionate about building systems that are both rigorous and useful at scale.

## Work Experience
### Principal Software Development Engineer @ Snowflake
Jan 2020 – Present
2026 - current: Working on making SQL cool again :) 
2024 - 2026: Worked on Cortex AISQL (https://arxiv.org/abs/2511.07663).
2020-2024: Worked on Unistore query processing (https://www.snowflake.com/en/data-cloud/workloads/unistore/).

### Software Engineer @ Amazon Web Services
Jan 2018 – Jan 2020 | San Francisco Bay Area
AWS Redshift. Member of the query processing team.

### Software Engineer @ Cloudera
Jan 2014 – Jan 2018 | San Francisco Bay Area
Worked on Apache Impala.

### Software Engineer @ Amiato
Jan 2012 – Jan 2014 | Palo Alto, CA
Worked on a data integration platform for semi-structured data.

### Research, SDE @ Microsoft Jim Gray Systems Lab
Jan 2010 – Jan 2012
Worked in SQL Server in-memory OLTP engine (Project Hekaton). Investigated the performance and scalability of Hekaton's core execution engine on non-uniform memory access (NUMA) hardware architectures. Implemented unique constraints in Hekaton's hash-based indices. Conducted research in workload partitioning techniques for parallel database systems.

### Research Intern @ Hewlett-Packard
Jan 2008 – Jan 2008 | Cupertino, CA
Studied and implemented query processing algorithms tailored to the performance characteristics of solid state drives.


## Education
### PhD in Computer Science
University of Toronto

### MSc in Computer Science
University of Athens

### Bachelor in Computer Science
University of Athens


## Contact & Social
- LinkedIn: https://linkedin.com/in/dimitristsirogiannis

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Source: https://flows.cv/dimitristsirogiannis
JSON Resume: https://flows.cv/dimitristsirogiannis/resume.json
Last updated: 2026-04-12