Hi there 👋

I am Jan, a software developer and computer scientist (Dr. rer. nat.) with a focus on distributed databases and distributed systems. I live in Berlin (Germany) and have been working in IT for about 20 years. I worked as a system administrator, network administrator, software developer, and CTO. At the moment, I am working as a senior software developer 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’m also maintaining the SECONDO database. This is an extensible database management system developed at the university at Hagen. The database can be extended by Algebra Modules that implement custom data models and operators. The software focuses on the handling of 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 (my master thesis, awarded as outstanding work and available as a book published by Springer).
💬 I also talked at international conferences (SSTD, IEEE BigData, CIKM, EDBT, …) about databases and published some peer-reviewed scientific papers. Have a look at my Demo Paper, which won the IEEE best demo- and short paper award at the BSD2019. See also my recent EDBT Paper, available as open access publication.
🤔 I’m looking for help on my PostgreSQL Lock Tracer project. A collection of tools to gain deep insights into PostgreSQL’s locking activities and troubleshoot performance-related issues.
📫 How to reach me: jnidzwetzki@gmx.de
⚡ Fun fact: My first installed Linux Distribution was a SuSE 6.1 (Kernel 2.2.6) in 1999, and my first computer was a Pentium 1 with 100 MHz and 16 MB RAM running Windows 95.

Short Curriculum Vitae

In the years 2002 - 2005, I did an apprenticeship as an IT specialist for system integration. From 2006 - 2009, parallel to my job, I attended a course for technical computer science at the DAA technical college. I successfully completed this course in 2009 as Staatlich geprüfter Informatiker (Certified Computer Scientist).

Between 2009 - 2022, I was enrolled as a part-time student at the FernUniversität in Hagen. In 2012, I graduated with a Bachelor of Science in Computer Science. In 2014, I graduated with a Master of Science in Computer Science with a focus 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.

From 2012 - 2014, I was also a student assistant (part-time) at the chair of Cooperative Systems for the courses Operating Systems, Distributed Systems, and Computational Geometry. In the years 2020 - 2022, I was a research assistant (part-time) at the chair of Databases for New Applications and maintained the SECONDO database kernel.

For more information, see my profile at 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 Cassandata - 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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