Eleni Tzirita Zacharatou
@elenitz.bsky.social
Assistant Professor and Head of the "Spatial Analytics and Large-Scale Data Processing" group at the Hasso Plattner Institute (@hpi.bsky.social).
Previously at ITU Copenhagen, TU Berlin, and EPFL (PhD).
https://heltzi.github.io
Previously at ITU Copenhagen, TU Berlin, and EPFL (PhD).
https://heltzi.github.io
Pinned
I am excited to join the #HPI faculty in Potsdam, Germany, where I will lead the "Spatial Analytics & Large-Scale Data Processing" research group.
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
Reposted by Eleni Tzirita Zacharatou
📢📢 The September 2025 issue of SIGMOD Record is out, so is the Reminiscences column. Thank you, Viktor Leis, Anja Gruenheid, @senorcarbone.bsky.social, and @elenitz.bsky.social for the great contributions!
pdf --> sigmodrecord.org/publications...
pdf --> sigmodrecord.org/publications...
September 30, 2025 at 12:53 PM
📢📢 The September 2025 issue of SIGMOD Record is out, so is the Reminiscences column. Thank you, Viktor Leis, Anja Gruenheid, @senorcarbone.bsky.social, and @elenitz.bsky.social for the great contributions!
pdf --> sigmodrecord.org/publications...
pdf --> sigmodrecord.org/publications...
I’m honored and grateful to be recognized as a Distinguished Reviewer for #VLDB2025. 🎉
Congrats to all the other Distinguished Reviewers and Associate Editors — great to be in such company!
Congrats to all the other Distinguished Reviewers and Associate Editors — great to be in such company!
September 3, 2025 at 9:09 AM
I’m honored and grateful to be recognized as a Distinguished Reviewer for #VLDB2025. 🎉
Congrats to all the other Distinguished Reviewers and Associate Editors — great to be in such company!
Congrats to all the other Distinguished Reviewers and Associate Editors — great to be in such company!
Sadly, I won’t be at #VLDB2025 🇬🇧, but Xenofon Chatziliadis will present our #ADMS paper on GPU-accelerated optimization for streaming systems. 🚀
📅 Mon, 9:00–9:30 (Moore Room, 4F)
📄 Paper: www.vldb.org/2025/Worksho...
🔗 Builds on NEMO (VLDB 2024): www.vldb.org/pvldb/vol17/...
📅 Mon, 9:00–9:30 (Moore Room, 4F)
📄 Paper: www.vldb.org/2025/Worksho...
🔗 Builds on NEMO (VLDB 2024): www.vldb.org/pvldb/vol17/...
August 29, 2025 at 6:03 PM
Sadly, I won’t be at #VLDB2025 🇬🇧, but Xenofon Chatziliadis will present our #ADMS paper on GPU-accelerated optimization for streaming systems. 🚀
📅 Mon, 9:00–9:30 (Moore Room, 4F)
📄 Paper: www.vldb.org/2025/Worksho...
🔗 Builds on NEMO (VLDB 2024): www.vldb.org/pvldb/vol17/...
📅 Mon, 9:00–9:30 (Moore Room, 4F)
📄 Paper: www.vldb.org/2025/Worksho...
🔗 Builds on NEMO (VLDB 2024): www.vldb.org/pvldb/vol17/...
Thank you @bifold.berlin for the feature!
@hpi.bsky.social
#SpatialAnalytics #LargeScaleData #WomenInSTEM
@hpi.bsky.social
#SpatialAnalytics #LargeScaleData #WomenInSTEM
HPI appoints BIFOLD fellow Eleni Tzirita Zacharatou as professor
Prof. Dr. Eleni Tzirita Zacharatou, BIFOLD Junior Fellow and former postdoctoral researcher in the DIMA group, has been appointed W2 Professor at the Hasso Plattner Institute, University of Potsdam. H...
www.bifold.berlin
July 17, 2025 at 11:03 AM
Thank you @bifold.berlin for the feature!
@hpi.bsky.social
#SpatialAnalytics #LargeScaleData #WomenInSTEM
@hpi.bsky.social
#SpatialAnalytics #LargeScaleData #WomenInSTEM
This week, I had the pleasure of visiting #Snowflake's #Berlin office to share an overview of my past and ongoing #research.
As you can see in the photos, I’m doing my best to live up to the stage presence of my cartoon #cat self 😀
As you can see in the photos, I’m doing my best to live up to the stage presence of my cartoon #cat self 😀
June 19, 2025 at 3:20 PM
This week, I had the pleasure of visiting #Snowflake's #Berlin office to share an overview of my past and ongoing #research.
As you can see in the photos, I’m doing my best to live up to the stage presence of my cartoon #cat self 😀
As you can see in the photos, I’m doing my best to live up to the stage presence of my cartoon #cat self 😀
Reposted by Eleni Tzirita Zacharatou
City data speaks – and here's how to listen
🌆📊 Cities are full of hidden stories in traffic, noise, and crime data. Eleni Tzirita Zacharatou @elenitz.bsky.social turns raw numbers into visuals that reveal what’s really going on.
#SoapboxScienceBerlin #WomeninScience #scicomm
🌆📊 Cities are full of hidden stories in traffic, noise, and crime data. Eleni Tzirita Zacharatou @elenitz.bsky.social turns raw numbers into visuals that reveal what’s really going on.
#SoapboxScienceBerlin #WomeninScience #scicomm
June 15, 2025 at 3:03 PM
City data speaks – and here's how to listen
🌆📊 Cities are full of hidden stories in traffic, noise, and crime data. Eleni Tzirita Zacharatou @elenitz.bsky.social turns raw numbers into visuals that reveal what’s really going on.
#SoapboxScienceBerlin #WomeninScience #scicomm
🌆📊 Cities are full of hidden stories in traffic, noise, and crime data. Eleni Tzirita Zacharatou @elenitz.bsky.social turns raw numbers into visuals that reveal what’s really going on.
#SoapboxScienceBerlin #WomeninScience #scicomm
🌟 Looking forward to joining this fun and unique event.
🗓️ Sunday, June 15, 2025
🕒 3–7 PM
📍 Holzmarkt 25, Berlin
Come say hi!
#ScienceForEveryone #WomenInSTEM #WomenInScience #SoapboxScience #SciComm
🗓️ Sunday, June 15, 2025
🕒 3–7 PM
📍 Holzmarkt 25, Berlin
Come say hi!
#ScienceForEveryone #WomenInSTEM #WomenInScience #SoapboxScience #SciComm
To start the week, let's introduce another wonderful speaker: Dr Eleni Tzirita Zacharatou ✨
She is an Assistant Professor at the @hpi.bsky.social
She is an Assistant Professor at the @hpi.bsky.social
June 2, 2025 at 3:41 PM
🌟 Looking forward to joining this fun and unique event.
🗓️ Sunday, June 15, 2025
🕒 3–7 PM
📍 Holzmarkt 25, Berlin
Come say hi!
#ScienceForEveryone #WomenInSTEM #WomenInScience #SoapboxScience #SciComm
🗓️ Sunday, June 15, 2025
🕒 3–7 PM
📍 Holzmarkt 25, Berlin
Come say hi!
#ScienceForEveryone #WomenInSTEM #WomenInScience #SoapboxScience #SciComm
Check out Harry's podcast on our Sheet Reader parser!
Parsing #Excel #spreadsheets at lightning speed — that’s exactly what we built SheetReader for!
📢 The fifth and final episode of the “DuckDB in Research” podcast series is out!
Haralampos Gavriilidis | SheetReader: Efficient spreadsheet parsing
🎧 Apple: podcasts.apple.com/us/podcast/h...
🎧 Spotify: open.spotify.com/episode/2CRR...
Haralampos Gavriilidis | SheetReader: Efficient spreadsheet parsing
🎧 Apple: podcasts.apple.com/us/podcast/h...
🎧 Spotify: open.spotify.com/episode/2CRR...
April 18, 2025 at 6:23 PM
Check out Harry's podcast on our Sheet Reader parser!
Reposted by Eleni Tzirita Zacharatou
Parsing #Excel #spreadsheets at lightning speed — that’s exactly what we built SheetReader for!
📢 The fifth and final episode of the “DuckDB in Research” podcast series is out!
Haralampos Gavriilidis | SheetReader: Efficient spreadsheet parsing
🎧 Apple: podcasts.apple.com/us/podcast/h...
🎧 Spotify: open.spotify.com/episode/2CRR...
Haralampos Gavriilidis | SheetReader: Efficient spreadsheet parsing
🎧 Apple: podcasts.apple.com/us/podcast/h...
🎧 Spotify: open.spotify.com/episode/2CRR...
April 18, 2025 at 5:39 PM
Parsing #Excel #spreadsheets at lightning speed — that’s exactly what we built SheetReader for!
Reposted by Eleni Tzirita Zacharatou
📢 📢 Pamela Delgado (HES-SO, Switzerland) has a fully-funded PhD position on efficient GPU resource management for deep learning! My team @itu.dk is looking forward to collaborating with her in this project! For more info on the position, see the image and the link: www.jobup.ch/en/jobs/deta...
April 14, 2025 at 3:50 PM
📢 📢 Pamela Delgado (HES-SO, Switzerland) has a fully-funded PhD position on efficient GPU resource management for deep learning! My team @itu.dk is looking forward to collaborating with her in this project! For more info on the position, see the image and the link: www.jobup.ch/en/jobs/deta...
Last week at #EDBT2025 in Barcelona was a blast! Gave an invited talk (thanks #Huawei!), moderated a DEI panel, and co-organized a DEI tutorial. Wrapped it all up with experiencing the stunning architecture and cultural scene in the city 🏛️🌞.
#academia #conference #databases
#academia #conference #databases
April 4, 2025 at 12:14 PM
Last week at #EDBT2025 in Barcelona was a blast! Gave an invited talk (thanks #Huawei!), moderated a DEI panel, and co-organized a DEI tutorial. Wrapped it all up with experiencing the stunning architecture and cultural scene in the city 🏛️🌞.
#academia #conference #databases
#academia #conference #databases
Reposted by Eleni Tzirita Zacharatou
I am recruiting 2 PhD students for Fall'25 @csaudk.bsky.social to work on bleeding-edge topics in #NLProc #LLMs #AIAgents (e.g. LLM reasoning, knowledge-seeking agents, and more).
Details: www.cs.au.dk/~clan/openings
Deadline: May 1, 2025
Please boost!
cc: @aicentre.dk @wikiresearch.bsky.social
Details: www.cs.au.dk/~clan/openings
Deadline: May 1, 2025
Please boost!
cc: @aicentre.dk @wikiresearch.bsky.social
Open positions and projects
### Open semester and Master's projects If you're an AU student looking for a semester project, a Bachelor project, or an MS thesis project, please refer to [this list](projects). ### Prospective PhD ...
www.cs.au.dk
March 18, 2025 at 9:12 AM
I am recruiting 2 PhD students for Fall'25 @csaudk.bsky.social to work on bleeding-edge topics in #NLProc #LLMs #AIAgents (e.g. LLM reasoning, knowledge-seeking agents, and more).
Details: www.cs.au.dk/~clan/openings
Deadline: May 1, 2025
Please boost!
cc: @aicentre.dk @wikiresearch.bsky.social
Details: www.cs.au.dk/~clan/openings
Deadline: May 1, 2025
Please boost!
cc: @aicentre.dk @wikiresearch.bsky.social
Excited to serve as Program Co-chair for #HDMS 2025! We warmly welcome all members of the Greek database community to submit their work and join us in the beautiful city of Ioannina.
Conference website: acmsigmod.gr/hdms/2025/
Conference website: acmsigmod.gr/hdms/2025/
March 18, 2025 at 2:05 PM
Excited to serve as Program Co-chair for #HDMS 2025! We warmly welcome all members of the Greek database community to submit their work and join us in the beautiful city of Ioannina.
Conference website: acmsigmod.gr/hdms/2025/
Conference website: acmsigmod.gr/hdms/2025/
Reposted by Eleni Tzirita Zacharatou
🚀 Willkommen am HPI: Zwei neue Professorinnen für #KI und #Datenanalyse! 🎉
Das Institut wächst weiter und begrüßt Prof. Dr. Sandra Wachter im Bereich Künstliche Intelligenz und Prof. Dr. Eleni Tzirita Zacharatou mit ihrer Expertise im Forschungsfeld Datenanalyse. 🔗 hpi.de/artikel/zwei...
Das Institut wächst weiter und begrüßt Prof. Dr. Sandra Wachter im Bereich Künstliche Intelligenz und Prof. Dr. Eleni Tzirita Zacharatou mit ihrer Expertise im Forschungsfeld Datenanalyse. 🔗 hpi.de/artikel/zwei...
March 3, 2025 at 4:19 PM
🚀 Willkommen am HPI: Zwei neue Professorinnen für #KI und #Datenanalyse! 🎉
Das Institut wächst weiter und begrüßt Prof. Dr. Sandra Wachter im Bereich Künstliche Intelligenz und Prof. Dr. Eleni Tzirita Zacharatou mit ihrer Expertise im Forschungsfeld Datenanalyse. 🔗 hpi.de/artikel/zwei...
Das Institut wächst weiter und begrüßt Prof. Dr. Sandra Wachter im Bereich Künstliche Intelligenz und Prof. Dr. Eleni Tzirita Zacharatou mit ihrer Expertise im Forschungsfeld Datenanalyse. 🔗 hpi.de/artikel/zwei...
I am excited to join the #HPI faculty in Potsdam, Germany, where I will lead the "Spatial Analytics & Large-Scale Data Processing" research group.
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
March 3, 2025 at 1:46 PM
I am excited to join the #HPI faculty in Potsdam, Germany, where I will lead the "Spatial Analytics & Large-Scale Data Processing" research group.
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
Looking forward to collaborating with many great students and peers here!
#SpatialAnalytics #LargeScaleData #NewJob
Reposted by Eleni Tzirita Zacharatou
Registration open until 21/04 for the 2025 VLDB Summer School ☀️ 28-31/07 - University of Wroclaw 🇵🇱
We have great lecturers on privacy preserving data management, data analytics, distributed databases, cloud computing, graph data & data(base) theory.
👉 vldb-sc25.cs.uni.wroc.pl
@vldb.bsky.social
We have great lecturers on privacy preserving data management, data analytics, distributed databases, cloud computing, graph data & data(base) theory.
👉 vldb-sc25.cs.uni.wroc.pl
@vldb.bsky.social
February 17, 2025 at 8:25 PM
Registration open until 21/04 for the 2025 VLDB Summer School ☀️ 28-31/07 - University of Wroclaw 🇵🇱
We have great lecturers on privacy preserving data management, data analytics, distributed databases, cloud computing, graph data & data(base) theory.
👉 vldb-sc25.cs.uni.wroc.pl
@vldb.bsky.social
We have great lecturers on privacy preserving data management, data analytics, distributed databases, cloud computing, graph data & data(base) theory.
👉 vldb-sc25.cs.uni.wroc.pl
@vldb.bsky.social
Reposted by Eleni Tzirita Zacharatou
📢📢VLDB26 (@vldb.bsky.social) will have a ShadowPC! Apply at forms.office.com/e/XYihKj4UKq by March 1! Great opportunity for folk who are new to the data management community & want to gain paper reviewing experience. More info at application form. Chairs: @zistvan.bsky.social, Tianzheng Wang, & I.
Microsoft Forms
forms.office.com
February 10, 2025 at 5:26 PM
📢📢VLDB26 (@vldb.bsky.social) will have a ShadowPC! Apply at forms.office.com/e/XYihKj4UKq by March 1! Great opportunity for folk who are new to the data management community & want to gain paper reviewing experience. More info at application form. Chairs: @zistvan.bsky.social, Tianzheng Wang, & I.
Reposted by Eleni Tzirita Zacharatou
📢📢 Have a PhD position on the IO-path of deep learning, co-funded by Innovation Fund Denmark. Selected candidate will be affiliated with Samsung Research Denmark and IT University of Copenhagen. Supervised by Vivek Shah, Javier González, and me. More details at www.linkedin.com/jobs/view/41...
Samsung Semiconductor hiring Industrial PhD Placement in Copenhagen, Capital Region of Denmark, Denmark | LinkedIn
Posted 3:30:26 PM. Samsung Semiconductor Denmark Research (SSDR) is Europe's R&D hub for Samsung's Memory Division…See this and similar jobs on LinkedIn.
www.linkedin.com
February 6, 2025 at 8:28 PM
📢📢 Have a PhD position on the IO-path of deep learning, co-funded by Innovation Fund Denmark. Selected candidate will be affiliated with Samsung Research Denmark and IT University of Copenhagen. Supervised by Vivek Shah, Javier González, and me. More details at www.linkedin.com/jobs/view/41...
New #BTW25 paper📍We enhance classic spatial indexes with a machine-learned search technique, boosting query performance by up to 53x.
🔗 Read more in our paper: heltzi.github.io/publications...
🔗 Read more in our paper: heltzi.github.io/publications...
January 21, 2025 at 8:28 PM
New #BTW25 paper📍We enhance classic spatial indexes with a machine-learned search technique, boosting query performance by up to 53x.
🔗 Read more in our paper: heltzi.github.io/publications...
🔗 Read more in our paper: heltzi.github.io/publications...
Happy to be part of this great initiative, and excited to interact with even more community members in the future! 😊 #AIgrid
We thank all #AIgrid mentors for their commitment to the next generation of #AI #researchers. BIFOLD proudly announce that our scientists, Begüm Demir (RSG Lead) and Eleni Tzirita Zacharatou ( BIFOLD fellow), are taking on mentorship roles.
www.linkedin.com/posts/ai-gri...
@elenitz.bsky.social
www.linkedin.com/posts/ai-gri...
@elenitz.bsky.social
AI Grid on LinkedIn: #artificialintelligence #computerscience #datamanagement #dataanalysis…
🌟 Meet 4 of our AI Grid Mentors! 🌟
At AI Grid, we are proud to have some of the leading minds in #ArtificialIntelligence as mentors in our network. Today…
www.linkedin.com
January 16, 2025 at 1:36 PM
Happy to be part of this great initiative, and excited to interact with even more community members in the future! 😊 #AIgrid
🌟 Promoting diversity, EDBT/ICDT 2025 🇪🇸 awards 5 students free conference registration 🌟
📢 Call: edbticdt2025.upc.edu?contents=di_...
🏆Awards: 5 grants for free registration (travel not included)
👉Apply here: forms.gle/6MefnqBHo3pF...
📅 Apply by: Feb 3, 2025
🌈 Results: Feb 14, 2025
Please share 😊
📢 Call: edbticdt2025.upc.edu?contents=di_...
🏆Awards: 5 grants for free registration (travel not included)
👉Apply here: forms.gle/6MefnqBHo3pF...
📅 Apply by: Feb 3, 2025
🌈 Results: Feb 14, 2025
Please share 😊
January 14, 2025 at 2:38 PM
🌟 Promoting diversity, EDBT/ICDT 2025 🇪🇸 awards 5 students free conference registration 🌟
📢 Call: edbticdt2025.upc.edu?contents=di_...
🏆Awards: 5 grants for free registration (travel not included)
👉Apply here: forms.gle/6MefnqBHo3pF...
📅 Apply by: Feb 3, 2025
🌈 Results: Feb 14, 2025
Please share 😊
📢 Call: edbticdt2025.upc.edu?contents=di_...
🏆Awards: 5 grants for free registration (travel not included)
👉Apply here: forms.gle/6MefnqBHo3pF...
📅 Apply by: Feb 3, 2025
🌈 Results: Feb 14, 2025
Please share 😊
🎉First paper of 2025! Great collaboration with Thanasis Georgiadis & Prof. Nikos Mamoulis.
🚀 We propose a new raster intervals approximation—lightweight, effective & tunable—delivering 3x speedup in spatial joins!
📖 link.springer.com/article/10.1...
#vldbjournal #spatial #data
🚀 We propose a new raster intervals approximation—lightweight, effective & tunable—delivering 3x speedup in spatial joins!
📖 link.springer.com/article/10.1...
#vldbjournal #spatial #data
Raster interval object approximations for spatial intersection joins - The VLDB Journal
Spatial join processing techniques that identify intersections between complex geometries (e.g., polygons) commonly follow a two-step filter-and-refine pipeline. The filter step evaluates the query pr...
link.springer.com
January 11, 2025 at 5:13 PM
🎉First paper of 2025! Great collaboration with Thanasis Georgiadis & Prof. Nikos Mamoulis.
🚀 We propose a new raster intervals approximation—lightweight, effective & tunable—delivering 3x speedup in spatial joins!
📖 link.springer.com/article/10.1...
#vldbjournal #spatial #data
🚀 We propose a new raster intervals approximation—lightweight, effective & tunable—delivering 3x speedup in spatial joins!
📖 link.springer.com/article/10.1...
#vldbjournal #spatial #data
Reposted by Eleni Tzirita Zacharatou
EDBT/ICDT now also has a BlueSky account: @edbticdt.bsky.social Preparations are well underway for the 2026 edition is Tampere, Finland 🇫🇮
December 9, 2024 at 11:35 AM
EDBT/ICDT now also has a BlueSky account: @edbticdt.bsky.social Preparations are well underway for the 2026 edition is Tampere, Finland 🇫🇮