Giannis Fikioris
Ph.D.,  Cornell University
gfikioris [at] cs [dot] cornell [dot] edu

I am a fourth year PhD student in the theory group at Cornell University. I am very fortunate to be advised by Éva Tardos and be supported by the NDSEG fellowship. I am broadly working on Algorithmic Game Theory and Learning Theory problems. My most recent work has been on Mechanism Design and/or Online Learning with global constraints.

During Fall 2023, I was a Student Researcher in the Market Algorithms team at Google Research. This internship led to No-Regret Algorithms in non-Truthful Auctions with Budget and ROI Constraints, published with Mingfei Zhao and Gagan Aggarwal.

Before coming to Cornell, I received my BSE from the department of Electrical and Computer Engineering at the National Technical University of Athens. I completed my undergraduate thesis with Dimitris Fotakis, titled Perturbation Stability for Mechanism Design.

From July 2019 to August 2020, I was working at NCSR “Demokritos” in the Complex Event Recognition Group, advised by Alexander Artikis.

How to pronounce my name.


  • Theoretical Computer Science
  • Algorithmic Game Theory
  • Learning Theory


Cornell University
2020 - present
Ph.D. in Computer Science
National Technical University of Athens
2014 - 2019
B.Sc. in Electrical and Computer Engineering



Work Experience

  • Student Researcher at the Market Algorithms, Google Research Sep. 2023 - Nov. 2023
    I worked with Mingfei Zhao and Gagan Aggarwal on problems related to Online Learning and Mechanism Design.
  • Research Associate at the Complex Event Recognition Group, NCSR “Demokritos” Jul. 2019 - Aug. 2020
    I worked on an algorithm that compresses the route of a ship, to make a simpler trajectory with less points. This allows a complex event recognition engine (RTEC) to identify various events more quickly and accurate.

Awards and Honors

  • Onassis Scholarship, three year financial support Cornell, 2022
  • NDSEG Fellowship, three year full financial support Cornell, 2022
  • NSF GRFP Fellowship, declined in favor of NDSEG Cornell, 2022
  • Gerondelis Scholarship, one time financial support Cornell, 2021
  • Papakyriakopoulos Award, for highest grade in Mathematic-related courses in 1st and 2nd semesters NTUA, 2015
  • Kritikos Grant, for highest grade in Mathematic-related courses in 1st year NTUA, 2015

Teaching Experience