About Patrik
I bring many years of experience in software and data engineering, open source, teaching, research, and IT consulting. I'm looking for interesting projects where I can apply my knowledge and further level up my skills.
German
Native or bilingual
English
Fluent
Can work on-site
Konstanz (up to 30km), Zürich (up to 30km), Frauenfeld (up to 30km), Winterthur (up to 30km)
Experience
- University of InnsbruckSecurity ResearchRESEARCHNovember 2018 - Today (7 years and 7 months)Innsbruck, AustriaI'm pursuing a PhD in Computer Science at the Security and Privacy Lab at the University of Innsbruck, Austria. My dissertation is titled "Proof-of-Work Consensus: Protocol Design, Security, and Incentives" and wraps three publications:
- In 2022, with my supervisor Rainer Böhme: "Parallel Proof-of-Work with Concrete Bounds". Published in Advances in Financial Technologies – AFT '22. https://doi.org/10.1145/3558535.3559773
- In 2023, with Ben Glickenhaus, George Bissias, and Gregory Griffith: "Tailstorm: A Secure and Fair Blockchain for Cash Transactions". Published in Advances in Financial Technologies – AFT '23. https://doi.org/10.4230/LIPIcs.AFT.2023.6
- In 2025, alone: "Automated Selfish Mining Analysis for DAG-Based PoW Consensus Protocols". Published in Applied Cryptography and Network Security – ACNS ’25. https://doi.org/10.1007/978-3-031-95761-1_8
For my research, I've programmed a lot of tooling for automated and reproducible analysis of consensus protocols: protocol specifications, network simulation, attack search with reinforcement learning and MDPs, evaluation, and visualization. The code is available on GitHub: https://github.com/pkel/cpr - Stadt KonstanzClimate Data PlatformPUBLIC SECTORMay 2024 - November 2025 (1 year and 6 months)Konstanz, GermanyBuilding the Climate Data Platform, a central component of the city's Smart Green City program. The funding Smart City grant program has a strict mandate to use open source software and release all new software as such. Hence there is full transparency about what I built:
- The climate data platform itself; based on Hypertegrity UDSP, Postgres, PostgREST, Python, Dagster, Kubernetes and ArgoCD. https://github.com/sgc-kn/platform
- Public dashboards; a static website based on Observable Framework. https://stadtdaten.konstanz.digital/ and https://github.com/sgc-kn/dashboards
- “Konstanz in Zahlen”: data management and validation with Python and Pydantic. https://github.com/sgc-kn/konstanz-in-zahlen
- University of InnsbruckTeachingEDUCATION AND E-LEARNINGNovember 2018 - February 2022 (3 years and 3 months)Innsbruck, AustriaI taught computer engineering and networks for undergrad students, first and third semester. During the pandemic we went fully online: streaming lectures and seminars on Twitch and running weekly automated and randomized tests (with R/exams) for about 250 students.
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Education
- Ph.D. CandidateSecurity and Privacy Lab, University of Innsbruck, Austria2025Researching the design, security, and incentives of proof-of-work consensus protocols. I expect to complete this degree in Q1/2026.
- M.Sc. Computer ScienceUniversity of Innsbruck, Austria2018Focus on Formal Methods and Information Security