Hi there 👋

I am Jan, a software developer and computer scientist (Dr. rer. nat.) specializing in distributed databases and distributed systems. I live in Berlin, Germany, and have been working in IT for about 20 years. Over the years, I have worked as a system administrator, network administrator, software developer, and CTO. Currently, I am a senior software developer working on a PostgreSQL extension for time-series data.

🔭 My PhD project is BBoxDB, a distributed key-bounding-box-value database. BBoxDB is a NoSQL database for multi-dimensional data implemented from scratch (see full paper). With BBoxDB Streams, the software can also process multi-dimensional data streams and execute continuous queries (e.g., continuous range queries and continuous spatial joins, see the full paper).
🌱 I also maintain the SECONDO database, an extensible database management system developed at the University of Hagen. The database can be extended with Algebra Modules that implement custom data models and operators. The software focuses on handling spatial and spatio-temporal data. I also developed Distributed SECONDO, a distributed version of SECONDO.
📚 I am the author of the book Entwicklung eines skalierbaren und verteilten Datenbanksystems, which is based on my master’s thesis. This work was awarded as outstanding and is available as a book published by Springer.
💬 I have spoken at international conferences (SSTD, IEEE BigData, CIKM, EDBT, …) about databases and have published several peer-reviewed scientific papers. Check out my Demo Paper, which won the IEEE Best Demo and Short Paper Award at BSD2019. You can also read my recent EDBT Paper, available as an open-access publication.
🤔 I’m looking for contributors to my PostgreSQL Lock Tracer project, a collection of tools designed to provide deep insights into PostgreSQL’s locking activities and troubleshoot performance-related issues.
📫 How to reach me: jnidzwetzki@gmx.de
⚡ Fun fact: My first Linux distribution was SuSE 6.1 (Kernel 2.2.6), which I installed in 1999. My first computer was a Pentium 1 with 100 MHz and 16 MB RAM running Windows 95.

Short Curriculum Vitae

From 2002 to 2005, I completed an apprenticeship as an IT specialist for system integration. Between 2006 and 2009, I attended a course in technical computer science at the DAA Technical College while working full-time. I successfully completed this course in 2009, earning the title Staatlich geprüfter Informatiker (Certified Computer Scientist).

From 2009 to 2022, I was enrolled as a part-time student at the FernUniversität in Hagen. In 2012, I earned a Bachelor of Science in Computer Science, followed by a Master of Science in Computer Science in 2014, focusing on Operating Systems, Distributed, and Cooperative Systems. In 2022, I received a Dr. rer. nat. (PhD equivalent) in Computer Science with a thesis on distributed databases.

Between 2012 and 2014, I worked as a student assistant (part-time) at the Chair of Cooperative Systems, assisting with courses on Operating Systems, Distributed Systems, and Computational Geometry. From 2020 to 2022, I served as a research assistant (part-time) at the Chair of Databases for New Applications, where I maintained the SECONDO database kernel.

For more details, visit my profile on LinkedIn.

My Interests

Database systems
Operating systems
Distributed, scalable, and fault-tolerant systems
Computer networks
Transactions and parallelism
Economics, financial markets, and algorithmic trading systems

Selected Publications

BBoxDB: A Distributed Key-Bounding-Box-Value Store - My PhD Thesis
BBoxDB Streams: Scalable Processing of Multi-Dimensional Data Streams - Distributed and Parallel Databases 2022
BBoxDB Streams: Scalable Processing of Multi-Dimensional Data Streams - Technical Report 2021
Distributed Arrays: An Algebra for Generic Distributed Query Processing - Distributed and Parallel Databases 2021 (co-author)
BBoxDB Streams: Distributed Processing of Real-World Streams of Position Data - EDBT 2021 / Slides
BBoxDB: A Distributed and Highly Available Key-Bounding-Box-Value Store - Distributed and Parallel Databases 2020
Demo Paper: Large-Scale Spatial Data Processing With User-Defined Filters in BBoxDB - IEEE Big Spatial Data 2019 / Poster / Slides
BBoxDB - A Scalable Data Store for Multi-Dimensional Big Data - CIKM 2018 / Poster
BBoxDB - A Distributed and Highly Available Key-Bounding-Box-Value Store - Technical Report 2018
Distributed SECONDO: An Extensible and Scalable Database Management System - Distributed and Parallel Databases 2017
Distributed SECONDO: An Extensible, Highly Available, and Scalable Database Management System - Technical Report 2016
Distributed SECONDO: A Highly Available and Scalable System for Spatial Data Processing - SSTD 2015 / Poster
Distributed SECONDO - A Distributed DBMS Based on SECONDO and Apache Cassandra - My Master Thesis
Optimierte Speicherzuteilung an Operatoren in Datenbanksystemen (Optimized Memory Allocation to Operators in Database Systems) - Informatiktage 2013 / Poster
Operator Cost Models for Progress Estimation and Optimization in Database Systems - My Bachelor Thesis

GPG Key

Jan Nidzwetzki jnidzwetzki@gmx.de
Fingerprint: A8FA E105 7812 65C5 7A53 58C9 918E 92F4 0507 962E

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