Hi! I am Stefan
I am a techie - not just at work, but also in my free time. I love drones and capturing the beauty of the Swiss mountains. I also enjoy playing with Smart-Home and IoT technology: there are sensors all over our apartment.
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I recently joined the Dfinity Foundation in Zurich to help build the Internet Computer. I'm excited to work with a smart team of excellent researchers and engineers on what could well be a revolution in the way we think about the internet.
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Before Dfinity, I was at Oracle Labs in Zurich, Switzerland, where I was working, among others, with Hassan Chafi, Sungpack Hong and Tim Harris. I am mostly involved with Callisto RTS and PGX.D, Oracle's distributed graph analytics framework.
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Callisto RTS
A runtime system for parallel applications with efficient work distribution down to small batch sizes to avoid work-imbalance. I also helped to extend it with Smart Collections, a programming language independent abstraction for data structures, which is tuning memory allocation to machine characteristics. -
PGX.D
PGX.D is a distributed graph processing framework. My main responsibility was to add fault-tolerance and elasticity to it.
In 2014, I also had the honor to finish an internship with Tim Harris at Oracle Labs in beautiful Cambridge, UK. -
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I earned my PhD from the Systems Group at ETH Zurich under the supervision of Prof. Timothy Roscoe. In addition to work on the Barrelfish operating system, I was leading two projects during my PhD:
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Shoal
A runtime for multicore machines that automatically tunes memory allocation and applies NUMA replication based on memory access patterns given by programmers or extracted by high-level compilers. -
Smelt
A framework to automatically build low-latency message-passing tree topologies for multicore machines based on simulation on the pairwise latency of all CPUs.
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I wrote my diploma thesis at IBM Research and Development in Böblingen, where I investigated the Performance of the VSAM file system in the z/VSE mainframe operating system.
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Before my time in Zurich, I studied at the Karlsruhe Institute of Technology (KIT), during which I have been working as research assistant in humanoid robotics and sensor networking.
