David Justen

Technische Universität Berlin
Faculty IV - Electrical Engineering and Computer Science
Big Data Engineering Group (DAMS Lab)

Room TEL-0812, Ernst-Reuter-Platz 7, 10587 Berlin

I am a second-year PhD student at Technische Universität Berlin, supervised by Prof. Matthias Boehm. Prior to this, I was a PhD student at Prof. Hasso Plattner’s Enterprise Platform and Integration Concepts (EPIC) chair at the Hasso Plattner Institute in Potsdam. My research focusses on query optimization for analytical database systems and cloud-based data processing. Specifically, I am looking into adaptive query processing and robust plan generation to reduce the effects of erroneous cardinality estimates.



  • Justen, David: Cost-efficiency and Performance Robustness in Serverless Data Exchange. SRC@SIGMOD 2022


  • Research and Implementation of Database Concepts (HPI) [WS22]
  • Develop Your Own Database (HPI) [SS22]
  • Trends and Concepts of Business Application Architecture (HPI) [SS22]

Work Experience

  • March ‘22 - present
    Research Assistant @ Hasso Plattner Institute, Potsdam, DE
  • October ‘19 - March ‘20
    Software Development Intern @ SAP, New York, US
  • March ‘18 - June ‘18
    Software Development Intern @ Native Instruments, Berlin, DE


  • 2018 - 2022
    IT-Systems Engineering (M.Sc.), Hasso Plattner Institute (University of Potsdam)
    Thesis: Cost-efficiency and Performance Robustness in Serverless Join Processing
  • 2015 - 2018
    Media Computer Science (B.Sc.), Berlin University of Applied Sciences and Technology
    Thesis: Evolving Neural Networks to Steer Autonomous Agents in a Labyrinth