Experience

Industry

2023-05
Mülheim, DE

Empowering Retail at ALDI DX

International Data & Analytics, Business Engagement

Career

Senior Staff Expert

Translating Tech Business

Lead-Data Sciene

Lead-Architecture

Lead Data Engineering

Software Engineering & Testing

Lead Quality Assurance

C-Level Analyses

Team Mentoring

Data Science Chapter

Agile WoW

Impressions

Highlights

Early Birds

2024-11-06
Mülheim, DE

Dear Diary,
while we are working remotely for the most part, I enjoy office days starting off early in the canteen having a coffee and breakfast at times, meeting colleagues, checking emails, and preparing the day; the industrial yet modern flair is awesome. I specifically value our on-site sprint changes kick-starting next adventures, or exchanging with the amazing team here at ALDI DX’s International Data & Analytics. We are changing retail.

Projects

Category Management

GenAI-powered Holistic Assortment Modeling

2024 - 2025 · read more

Assortment Optimization

Constrained Assortment Optimization and Demand Estimation

2023 - 2024 · read more

SCT-based Testing

Establishment of Synthetic Control-based Field Testing

2023 - 2024 · read more

Steering Marketing

Disentangling and Targeting Multi-Channel Advertising Effects

2024 · read more

References

Daniel Kraiß

Line Manager

ALDI DX

George Adams

Personnel Manager

ALDI DX

Kevin Wong

Chapter Lead Data Science

ALDI DX

Scrum-Certified PSD Fire Protection Officer First Responder #ALDIDX #DrivingDigitalValue #ALDICrew #TeamALDI #ALDISÜD

Academia

2019-09
Cottbus, DE

Following the White Rabbit

Brandenburg University of Technology, Chair of Computer Networks

Career

Senior Scientific Researcher

Computational Social Science

Computational Linguistics

Computer Networks

Teaching

Supervision

Strategic Projects

Infrastructure

Coffee

Impressions

Highlights

Nice la Belle

2022-10-24
Nice, FR

Dear Diary,
the weather has been good to all Europe, yet, I had the pleasure of a last summer breeze attending IMC'22. Thanks for an awesome welcome reception on the rooftop of the venue; thanks for many great talks, and super interesting (poster) discussions on Internet measurements.

Projects

LaBeCo

Language Behaviour in Context - A Transdisciplinary Approach

Research Initiative

Our Contribution: Making Context computationally tabgile

2018 - 2023 · read more

AIDOS

Artificial Intelligence-based DDoS Mitigation at Internet Exchange Points

Securing Internet Exchanges with AI

2021 - 2023 · read more

PAM'21

Passive and Active Measurement Conference

(Virtual) Conference Organization

March 2021 · read more

Publications

Highlights

IPD: Detecting Traffic Ingress Points at ISPs

Stefan Mehner , Jens Helge Reelfs , Ingmar Poese , Oliver Hohlfeld

ACM Special Interest Group on Data Communication

SIGCOMM · 2024 · read more

Reviewing War: Unconventional User Reviews as a Side Channel to Circumvent Information Controls

José Miguel Moreno , Sergio Pastrana , Jens Helge Reelfs , Pelayo Vallina , Savvas Zannettou , Andriy Panchenko , Georgios Smaragdakis , Oliver Hohlfeld , Narseo Vallina-Rodriguez , Juan Tapiador

International AAAI Conference on Web and Social Media

ICWSM · 2024 · read more

Content & User Behavior in Anonymous Hyperlocal Online Platforms

Jens Helge Reelfs

Dr. rer. nat. Thesis

Dr. Thesis · 2023 · read more

Interpreting Emoji with Emoji: 🏖️ => ☀️😎🌊

Jens Helge Reelfs , Timon Mohaupt , Sandipan Sikdar , Markus Strohmaier , Oliver Hohlfeld

Workshop on Emoji Understanding and Applications in Social Media at NAACL-HLT

NAACL-HLT Emoji · 2022 · read more

Service to the Community

Highlights

WebSci

ACM Web Science Conference

Technical Program Committee

2024 , 2023

MTAP

Springer International Journal Multimedia Tools and Applications

Review

2023 , 2022 , 2021

LocWeb

WWW International Workshop on Location and the Web

Technical Program Committee

2023

TKDE

IEEE Transactions on Knowledge and Data Engineering

Review

2021

CoNEXT

ACM International Conference on emerging Networking EXperiments and Technologies

Artifact Evaluation

2021

Teaching

Highlights

Mini Internet Platform

Prof. Dr. Oliver Hohlfeld

Created by the Networked Systems Group from ETHZ, code available on GitHub

Summer 2022 , Summer 2021 , Summer 2020 ·
read more

Internet Measurements and Forensics

Prof. Dr. Oliver Hohlfeld

Awarded ‘22

Summer 2022 , Summer 2021 , Summer 2020 ·
read more

Internet - Functionality, Protocols, Applications

Prof. Dr. Oliver Hohlfeld

Summer 2020 ·
read more

Supervision

Highlights

Modeling Malicous Content via LLMs on the Jodel OSN

Leon Wolter

Brandenburg University of Technology

Master · 2022

Emoji-Enhanced Interpretable Word Embeddings

Timon Mohaupt

RWTH Aachen University

Master · 2021

Predicting Churn on the Jodel OSN

Max Bergmann

Best Faculty's Bachelor Thesis

Brandenburg University of Technology

Bachelor · 2021

References

Prof. Dr. Oliver Hohlfeld

Line/Personnel Manager

University of Kassel

Prof. Dr. Markus Strohmaier

Scientific Cooperation

Mannheim Business School

Prof. Dr. Stella Neumann

Scientific & Project Cooperation

RWTH Aachen University

#ComputationalSocialSciences #ComputationalLinguistincs #ComputerNetworks #DataScience #LeadingInternationalResearch #Teaching #Infrastructure

Academia

2015-07
Aachen, DE

There must be more out there

RWTH Aachen University, Chair of Computer Networks, Network Architectures Group

Career

Scientific Researcher

Computational Social Science

Computational Linguistics

Computer Networks

Teaching

Supervision

Projects

Infrastructure

Coffee

Impressions

Highlights

Pacific Summer nights

2019-05-19
Mendocino, CA, US

Dear Diary,
Spent some days with friends within the Bay area after WWW'19 in SF; First night on my trip to Seattle.

Peleș Castle

2016-09-03
Sinaia, RO

Dear Diary,
to be remembered: A beauty of remains! Sort of an early present to our project Meeting in Bukarest with the NETSYS Group.

Modestly pompous

2016-03-22
Cambridge, GB

Dear Diary,
the historical city of Cambridge definitely is worth a visit! You literally can feel a weird Bri’ish academic culture on the streets. If you were wondering - accomodation at Churchill College near the UCAM Computer Science facilities; and a lovely dinner at Sidney Sussex College.

Projects

SSICLOPS

Scalable and Secure Infrastructures for Cloud Operations

Federated Cloud Infrastructures

Our Contributions:

Cloud Data Policies
Enhancing Kernel-Level Networking

2015 - 2018 · read more

COMTEX

Context in Anonymous Short Texts

Anonymous Social Network/Interaction Analysis combining Lingusitics and Graph Modeling

2018 - 2019 · read more

IoTRUST

Security of Consumer Electronic Devices

Security-Risk Assessment Analysis

2018 - 2019 · read more

Publications

Highlights

Demystifying the Performance of XDP BPF

Oliver Hohlfeld , Johannes Krude , Jens Helge Reelfs , Jan Rüth , Klaus Wehrle

IEEE Conference on Network Softwarization

Netsoft · 2019 · read more

Hashtag Usage in a Geographically-Local Microblogging App

Jens Helge Reelfs , Timon Mohaupt , Oliver Hohlfeld , Niklas Henckell

International Workshop on Location and the Web at WWW

WWW LocWeb · 2019 · read more

Service to the Community

Highlights

AAIML

IEEE Advances in Artificial Intelligence and Machine Learning for Networking

Review

2019

Teaching

Highlights

Network Architectures and Performance

Prof. Dr. Oliver Hohlfeld

Summer 2018 , Summer 2017 ·
read more

Advanced Internet Technology

Prof. Dr. Klaus Wehrle

Winter 2019 , Winter 2015 ·
read more

Communication Systems Lab

Prof. Dr. Klaus Wehrle

Summer 2017 ·
read more

Supervision

Highlights

Popularity Prediction on the Jodel OSN

Jan Garcia

RWTH Aachen University

Master · 2019

Performance of Outsourcing eBPF to a SmartNIC

Jan Gosser

RWTH Aachen University

Master · 2018

Information Diffusion on the Jodel OSN

Timon Mohaupt

RWTH Aachen University

Bachelor · 2018

References

Prof. Dr. Oliver Hohlfeld

Line Manager

University of Kassel

Prof. Dr. Klaus Wehrle

Peronnel Manager

RWTH Aachen University

Prof. Dr. Markus Strohmaier

Scientific Cooperation

Mannheim Business School

#ComputationalSocialSciences #ComputationalLinguistincs #ComputerNetworks #DataScience #LeadingInternationalResearch #Teaching #Infrastructure

Industry

2013-07
Mülheim, DE

Headstart into Retail

ALDI SÜD, International Services, Buying

Career

IT-Specialist

Requirements Management

Requirements Engineering

Solution Design

Data Migration & Interdependencies

Advanced Reporting

Technical Consulting

Joint Taskforce Expansion

ALDI's Milk Mice

Impressions

Highlights

The BEAN

2013-10-13
Chicago, IL, US

Dear Diary,
unnecessary facts: This piece of art actually is called Cloud Gate created by Sir Anish Kapoor, built in 2006. Had a wonderful week meeting my colleagues from overseas and getting to know the ALDI US headquarters.

Projects

Master Data Management Suite

International and Central Buying

2013 - 2015 · read more

Ticketing System

Pilot Test and Migration Ticketing System

2014 - 2015 · read more

References

Markus Gebhardt

Line Manager

ALDI SÜD

#TeamALDI #TeamBuying #RequirementsManagement #AdvancedReporting #TaskForceExpansion