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Prof. Dr. Jacques Klein

Chief Scientist (Full Prof.)
Co-head of the TruX Research Group
SnT Centre, University of Luxembourg
jacques.klein at uni.lu
Google Scholar / DBLP / Orbi.lu
LinkedIn / Semantics Scholar
ORCID: 0000-0003-4052-475X

Contact:

Address: 6, rue Richard Coudenhove-Kalergi,
L-1359 Luxembourg, Luxembourg
Phone: +352 466644 5600
email: jacques.klein at uni.lu
skype: jacquesklein2302
Twitter: @JacquesKlein14

Short Bio:

Since 2010, I have been working at the SnT center of the University of Luxembourg, first as a Research Scientist (from 2010 to 2015), then as a Senior Research Scientist (Faculty position, from 2015 to 2019), and as Chief Scientist I (Associate Prof., from 2019 to 2022). Finally, in January 2023, I was promoted to full professor (Chief Scientist II). With my colleague Prof. Bissyande, we are heading the TruX research group. Since Oct. 2018, I have been a member of the University Council of the University of Luxembourg as a representative of the Interdisciplinary Centers Professors. From August 2021 to May 2022, I was a visiting scholar at the University of Washington, Seattle, in the PLSE group (mostly working with Prof. Mike Ernst and Prof. René Just).

Research interests:

I am working in Software Engineering and Software Security, with a specific focus on:

1. Program analysis -- applied to mobile security,
2. Software debugging -- especially bug localization and program repair, and
3. NLP and AI for software engineering -- especially to devise new code representation techniques.

Employment History:

• Jan. 2023- present: Chief Scientist I (Full Prof.) at SnT, University of Luxembourg
• Nov. 2019- Dec. 2022: Chief Scientist II (Associate Prof.) at SnT, University of Luxembourg
• Aug. 2015- Oct. 2019: Senior Research Scientist (Faculty Member) at SnT, University of Luxembourg
• Mar. 2010- Jul. 2015: Research Scientist, Faculty of Science, Technology and Communication, University of Luxembourg, SnT member
• Mar. 2009- Mar. 2010: Project Leader, Public Research Center Gabriel Lippmann, Belvaux, Luxembourg
• 2007-2009: Post-Doc, University of Luxembourg
• Sep. 2003- Dec. 2006: INRIA PhD Student, INRIA Rennes Bretagne Atlantique, Triskell Team

Education:

• 2006: Ph.D. in Computer Science, University of Rennes 1, France
• 2003: Engineering School, Mulhouse, France

Grants:

I am/was Principal Investigator on a dozen of projects including industrial partnership projects. I acquired more than 5 million euros of project funding (mainly through projects funded by the Luxembourg Research Agency, the European Commission, and industrial partnerships). The full list of acquired grants could be found here.

Publications:

All my publications are available on my publication page.
Selected publications can be found here.

PhD Supervision:

I supervise the following PhD students (often with the help of colleagues, in particular Prof. Dr. Tegawendé F. Bissyandé):

1. From Nov. 1, 2021: Damien Francois working on the IDAE (Integrative Data Analysis in Epilepsy) project, University of Luxembourg IAS Audacity funding (also advised by Prof. Alexander Skupin)
2. From Feb. 1, 2022: Alioune Diallo working on Android app analysis, LuxWAyS funding
3. From Jun. 15, 2022: Yewei Song working on NLP, Chatbot, and AI, FNR BRIDGES funding and Industrial Partnership funding from BGL BNP Paribas
4. From Sep. 1, 2022: Despoina Giarimpampa working on Security Operations Center Automation, Industrial Partnership funding from the Army of Luxembourg
5. From Oct. 15, 2022: Marco Alecci working on Android Security, FNR CORE funding (REPROCESS Grant)
6. From Mar. 15, 2023: Jules Wax working on Explainable AI for non-Experts, Industrial Partnership with Zortify
7. From Nov. 1, 2023: Pedro Jesus Ruiz Jimenez working on Android App Analysis, FNR CORE funding (UNLOCK Grant)
8. From Feb. 15, 2024: Omar El Bachir working on NLP, Chatbot, and AI, Industrial Partnership with BGL BNP Paribas
9. From Dec. 1, 2024: Loïc Taleb working on vulnerability and malware detection, Industrial Partnership funding from the Army of Luxembourg
10. From Nov. 1, 2025: Laura Bernardy working on NLP for dark web analysis
11. From Nov. 1, 2025: Elouan Rigaut working on Stalkerware and Threat Intelligence

Past PhD Supervision:

1. From Apr. 2021 to Dec. 2024: Dr. Tiezhu Sun
• PhD Title: Boosting Android Malware Learning
• Funding: FNR AFR
• Supervision done in collaboration with Prof. Bissyandé
• Currently Research Associate at the SnT, University of Luxembourg
2. From Feb. 2019 to Jun. 2023: Dr. Yusuf Arslan
• PhD Title: On the Integration of Interpretable Machine Learning Techniques to Machine Learning Pipelines
• Funding: Partnership with BGL BNP Paribas and FNR BRIDGES programme (project ExLIFT)
• Supervision done in collaboration with Prof. Bissyandé
3. From Mar. 2019 to Mar. 2023: Dr. Cédric Lothritz
• PhD Title: NLP De Luxe - Challenges for Natural Language Processing in Luxembourg
• Funding: Industrial Partnership funding, Partnership with BGL BNP Paribas and the Weicker Foundation
• Supervision done in collaboration with Prof. Bissyandé
• Currently Research Associate at LIST, Luxembourg
4. From Feb. 2019 to Jan. 2023: Dr. Nadia Daoudi
• PhD Title: Revisiting and Boosting state-of-the-art ML-based Android Malware Detectors
• Funding: University of Luxembourg Internal research project
• Supervision done in collaboration with Dr. Kevin Allix
• Currently Research Associate at LIST, Luxembourg
5. From Nov. 2019 to Jan. 2023: Dr. Jordan Samhi
• PhD Title: Analyzing Unanalysable Android Apps' Code
• Funding: FNR AFR
• Supervision done in collaboration with Prof. Bissyande
• Currently Research Scientist (permanent position) at the SnT, University of Luxembourg
6. From Jul. 2018 to Sep. 2022: Dr. Timothée Riom
• PhD Title: A Software Vulnerabilities Odysseus: Analysis, Detection, and Mitigation
• Funding: FNR CORE
• Supervision done in collaboration with Prof. Bissyande, Prof. Allix, and Prof. Bartel
• Currently Post-Doc at the Umeå University, Sweden
7. From Apr. 2017 to Apr. 2021: Dr. Pingfan Kong
• PhD Title: Taming Android App Crashes
• Funding: FNR AFR
• Supervision done in collaboration with Prof. Bissyande and Prof. Li
• Currently Software Engineer at Huawei, Hong Kong
8. From Jan. 2017 to Jan. 2021: Dr. Jun Gao
• PhD Title: Mining App Lineages: A Security Perspective
• Funding: FNR Pride
• Supervision done in collaboration with Prof. Bissyande and Prof. Li
• Currently Software Engineer at John Deere Bank, Luxembourg
9. From Sept. 2015 to July 2019: Dr. Médéric Hurier
• PhD Title: Creating better ground truth to further understand Android malware
• Funding: UL structural
• Supervision done in collaboration with Prof. Bissyande (the official supervisor was Prof. Le Traon)
• Currently working as a freelancer
10. From Jan. 2015 to Jan. 2018 : Dr. Daoyuan Li
• PhD Title: Transforming Time Series for Efficient and Accurate Classification
• Funding: Paul Wurth Partnership
• Supervision done in collaboration with Prof. Bissyande (the official supervisor was Prof. Le Traon)
• Currently working at Finquest
11. From Sept. 2013 to Nov. 2016: Dr. Li Li
• PhD Title: Boosting Static Security Analysis of Android Apps through Code Instrumentation
• Funding: FNR CORE ANDROMAP project
• Supervision done in collaboration with Prof. Bissyande (the official supervisor was Prof. Le Traon)
• Currently Professor at Beihang University, China
12. From Oct. 2011 to Oct. 2015: Dr. Kevin Allix
• PhD Title: Challenges and Outlook in Machine Learning-based Malware Detection for Android
• Funding: UL structural
• Supervision done in collaboration with Prof. Bissyande (the official supervisor was Prof. Le Traon)
• Currently freelancer, France
13. From Sept. 2011 to Sept. 2015: Dr. Phu Nguyen
• PhD Title: Model-Driven Security With Modularity and Reusability For Engineering Secure Software Systems
• Funding: FNR CORE MITER project
• The official supervisor was Prof. Le Traon
• Currently Research Scientist at SINTEF, Oslo, Norway
14. From Oct. 2010 to Sept. 2014: Dr. Alexandre Bartel
• PhD Title: Static Analysis for Android Security
• Funding: AFR
• Supervision done in collaboration with Prof. Monperrus (the official supervisor was Prof. Le Traon)
• Currently Professor at the Umeå University, Sweden

I was partially involved in the supervision of the following PhD thesis:

• From Oct. 2011 to May 2015: Dr. Christopher Henard
• PhD Title: Test of Large Scale Software Product Line
• Funding: Cetrel Partnership
• PhD student mainly advised by Prof. Y. Le Traon and Dr. Mike Papadakis
• Currently working at QuanoX
• From Nov. 2013 to Oct. 2016: Dr. Assaad Moawad
• PhD Title: Towards ambient intelligent applications using Models@run.time and machine learning for context-awareness
• Funding: FNR CORE COPAIN Project
• PhD student mainly advised by Prof. Y. Le Traon and Dr. Francois Fouquet
• Currently working at DataThings
• From Nov. 2013 to Oct. 2016: Dr. Jabier Martinez
• PhD Title: Mining Software Artefact Variants for Product Line Migration and Analysis
• Funding: AFR from FNR
PhD student mainly advised by Prof. Y. Le Traon, Prof. Tewfik Ziadi and Dr. Tegawende Bissyande
• Funding: AFR from FNR
• Currently working at TECNALIA Research & Innovation
• From Aug. 2013 to Nov. 2016: Dr. Thomas Hartmann
• PhD Title: Enabling Model-Driven Live Analytics for Cyber-Physical Systems: The Case of Smart Grids
• Funding: AFR and the CREOS partnership
• PhD student mainly advised by Prof. Y. Le Traon and Dr. Francois Fouquet
• Currently working at DataThings

Dataset:

With my colleagues, we maintained a constantly growing set of Android apps (more than 24 millions apks in early 2024) that we make available to the research community: https://androzoo.uni.lu/

Service:

• General Co-Chair of ASE 2023 and MobileSoft 2025
• Program Committee (co-)Chair: ISSTA 2027, MobileSoft 2023
• Steering committee member of the ACM SIGSOFT International Symposium on Software Testing and Analysis - ISSTA - (since July 2025), the IEEE/ACM International Conference on Automated Software Engineering - ASE -(since Sept. 2023) and of MobileSoft (since 2023)
• Editorial Board Member of the Springer Empirical Software Engineering Journal (EMSE), since 2021
• Since 1 June 2022, member of the evaluation committee for Brainstorm and Distinguished projects of the Institute for Advanced Studies (IAS) of the University of Luxembourg
• Member of the "Institut Grand-Ducal - Section des Sciences" (from June 2024)
• Conference Program Committee Member: ICSE 2026 (Area chair), ISSTA 2026 (Area chair), FSE 2026, ASE 2025, ISSTA 2025, ICSE 2025, ISSTA 2024, ISSTA 2023, SANNER 2023, SecDev 2023, ASE 2022, SANNER 2022, ASE 2021, MSR 2021 Registered Report, MobileSoft 2021, ASE 2020, ICSE 2020, SPLC 2019, ISSTA 2018, SPLC 2017, MODELS 2016, ESSOS 2016, QRS 2016, SmartGridComm 2016 & 2015, WAMA 2016, NIER@ICSE 2015 (New Ideas and Emergent Results at ICSE), QRS 2015, SDL Forum 2015, SAM 2014 (System Analysis and Modelling conference), QSIC 2014 (International Conference on Quality Software), NIER@ICSE 2014 (New Ideas and Emergent Results at ICSE), QSIC 2013 (13th International Conference on Quality Software), AOSD/MODULARITY 2013 (12th International Conference on Aspect-Oriented Software Development) , SEAA 2010
• Co-Chair of the Artifact Evaluation Committee of ESSOS 2016
• Co-coordinator (with Prof. Tom Mens) of the ERCIM New No. 88, Jan. 2012, Special Theme: "Evolving Software"
• Organizing Chair of the 6th IEEE International Conference on Software Testing, Verification and Validation (ICST 2013)
• Tools Demonstration Track Co-Chairs at CSMR 2013 (European Conference on Software Maintenance and Reengineering)
• Workshop Program Committee Member: WAMA 2016-2017, MOMO 2016, REVE2015, REVE2014, VAO 2016-2015-2014, JLDP 2013, CMA@MODELS 2013, CMA@RE 2013, VAO 2013, JLDP 2012, JLDP 2011, VAST 2011, MDSM 2011, Meta-Aspect 2010
• Luxembourgian representative at the ERCIM Software Evolution Working Group
• Reviewer of the following journals: Empirical Software Engineering, IEEE Transaction on Software Engineering (TSE), Springer Software and Systems Modeling (SOSYM), IEEE Transactions on Dependable and Secure Computing (TDSC), Software: Practice and Experience (SPE), Springer Transactions on Pattern Languages of Programming, IST, ACM Survey, TAOSD (LNCS Transactions on Aspect-Oriented Software Development journal), etc.
• External reviewer of the following conferences: TOOLS’12, ICST’12, ICSE@NIER’12, ICSE'09, MODELS'09, EMISA'09, MODELS'07, MODELS'06, ISSRE'06, LMO'O6, SCESM'06
• Poster Track co-chair at ICST 2020
• Member of the University Council of the University of Luxembourg as representative of the FSTC’s scientific, administrative and technical staff from May 2010 to July 2015
• Since Oct. 2018, member of the University Council of the University of Luxembourg as representative of the Interdisciplinary Centers Professors.

Teaching Responsability:

• I am responsible for the following courses:
• “Introduction to Static Program Analysis”, in the Master in Information and Computer Sciences (MICS) of the University of Luxembourg. 45 teaching units and 5 ECTS.
• "Software Vulnerabilities: Exploitation and Mitigation" in the Master in Information and Computer Sciences (MICS) of the University of Luxembourg. 45 teaching units and 5 ECTS.
• "Static and dynamic software security analysis" in CYBERUS (Erasmus Mundus joint Master in Cybersecurity). 45 teaching units and 5 ECTS.
I was responsible for the course entitled "Principles of Software Engineering" in MICS from 2016 to 2020 (45 teaching units among which 30 were done by myself).
• Master thesis supervision:
• Adrien Geets (2023, University of Luxembourg), Lucas Visintin ((2023, University of Luxembourg)), Pedro Ruiz (2023, University of Luxembourg), Frederick Van Der Windt (2023, KTH), Claude Ohloff (2022, University of Luxembourg), Ye Qiu (2022, University of Luxembourg), Isabella Olariu (2022, University of London), Vanitha Varadharajan (2021, University of Luxembourg), Nabila Khouya (2021, University of Luxembourg), Mansaf Bourkaib (2021, University of Luxembourg), etc.

Awards:

• November 2025: ASE 2025 Distinguished Reviewer Award.
• May 2025: Best paper award for the paper entitled "Enhancing Small Language Models for Cross-Lingual Generalized Zero-Shot Classification with Soft Prompt Tuning" presented at the First Workshop on Language Models for Underserved Communities (LM4UC) (at NAACL 2025).
• April 2025: ICSE 10 years most influential paper award for “IccTA: Detecting Inter-Component Privacy Leaks in Android Apps”. The authors are: L. Li, A. Bartel, T. F. Bissyandé, J. Klein, Y. Le Traon, S. Arzt, S. Rasthofer, E. Bodden, D. Octeau, and P. McDaniel. \url{https://doi.org/10.1109/ICSE.2015.48}. Published at ICSE 2015.
• June 2024: 2024 Most Influential PLDI Paper Award for the PLDI 2014 paper "FlowDroid: Precise Context, Flow, Field, Object-sensitive and Lifecycle-aware Taint Analysis for Android Apps".
• September 2024: Most Influential Paper in Software Product Line research for our paper ICST 2010 entitled "Automated and Scalable T-wise Test Case Generation Strategies for Software Product Lines"
• July 2020: KDD Health Day, AI for COVID-19, Best paper award for the paper entitled "Data-driven Simulation and Optimization for COVID-19 Exit Strategies"
• September 2018: IPSJ SIG SE Excellent Research Award, Information Processing Society of Japan, for our ICSE 2028 paper entitled "FaCoY - A Code-to-Code Search Engine"
• May 2018: FOSS (Free, Open Source Software) Impact Award, MSR, for our MSR 2018 paper entitled "Characterising Deprecated Android APIs"
• March 2016: Award of Best ERA paper, SANER, for our SANER 2016 paper entitled "Parameter Values of Android APIs: A Preliminary Study on 100,000 Apps"

Keynotes:

• June 2025 at the International Conference on Predictive Models and Data Analytics in Software Engineering (PROMISE 2025), Trondheim, Norway.
  Title: Datasets, AI, and Static Analysis for Efficient Mobile App Analysis
  You can download the slides here: [pdf]
• April 2025, Keynote presentation for the ICSE 10 years Most Influential Paper award, at ICSE 2025, Ottawa, Canada.
• December 2024 at the APSEC 2024 conference.
  Title: Mobile App Analysis
  You can download the slides here: [pdf]
• July 2024 at the NLPAICS 2024 conference.
  Title: AI for Software Vulnerabilities and Android Malware Detection
  You can download the slides here: [pdf]
• June 2024 at the DefMal 2024 Workshop.
  Title: AI for Software Vulnerabilities and Android Malware Detection
• June 2021 at the 1st International Symposium on Advanced Security on Software and Systems (ASSS 2021).
  Title: A Journey Through Android App Analysis: Solutions and Open Challenges
  I wrote a short paper for this keynote. You can download it here: [pdf]

MISC:

• My wife is breeding Bernedoodle. Do not hesitate to visit her website.