Staffan Gimåker
Member Of Technical Staff at Modal
Stockholm, Sweden
Summary
🤩
Rockstar🎓
Top SchoolStaffan Gimåker is a seasoned backend and infrastructure engineer with 14 years of experience building resilient distributed systems from Stockholm. He has a strong track record at Spotify, Detectify, Modal Labs and now Modal, focusing on orchestration, networking and performance-sensitive C++ work as well as DevOps tooling. Notable open-source contributions include improving Spotify’s Helios orchestration CLI and adding migration-aware rolling updates, and optimizing memory- and compaction-heavy trie structures in the core of ZeroMQ. Comfortable across systems and tooling, he combines production-first pragmatism with low-level problem solving—often surfacing fixes that prevent subtle runtime failures. Trained in computer engineering at KTH, he brings both academic grounding and a practical knack for hard-to-reproduce issues in distributed environments.
14 years of coding experience
13 years of employment as a software developer
Computer Engineering, Computer Engineering at KTH Royal Institute of Technology
English, Swedish
Github Skills (15)
javas10
container10
docker10
orchestration10
mq10
c-language10
zeromq10
orchestra10
cprogramming-language10
messaging10
dockers10
networking10
java10
concurrency10
testing9
Programming languages (7)
Github contributions (5)
spotify/helios
May 2015 - Jul 2017
Docker container orchestration platform
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:122 commits, 83 PRs, 173 pushes in 2 years 2 months
Contributions summary:Staffan contributed to the container orchestration platform by implementing a hack to improve the JSON output of the "helios status" command. The user also added a "--migrate" flag to the rolling-update command, which facilitates migrating services to deployment groups. Furthermore, the user addressed an issue related to potential null pointer exceptions within the RollingUpdateService and introduced more flexible host selectors for deployment groups. The commits demonstrate an involvement in both the core functionality of the orchestration platform and the related testing and tooling.
containersorchestrationcontainer-orchestrationdockerdocker-container
zeromq/libzmq
Jan 2012 - Feb 2012
ZeroMQ core engine in C++, implements ZMTP/3.1
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits in 1 month
Contributions summary:Staffan primarily focused on optimizing the `mtrie` and `trie` data structures within the ZeroMQ core engine. Their contributions involved pruning redundant nodes, reducing memory usage, and fixing bugs related to the table compaction logic. They also addressed a bug in `xpub.cpp`, where unexpected data was handled, improving the robustness of the system. Furthermore, they resolved address resolving issues within the connection process.
concurrencyzeromqnetworkingstreampushpull
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