Rene Treffer
Staff Softwareengineer at Reddit, Inc.
Berlin, Germany
Summary
🤩
RockstarRene Treffer is a Staff Software Engineer based in Berlin with 16 years of experience building reliable, high-performance backend systems and production infrastructure. He blends deep systems-level expertise—evidenced by fixes to go-diskfs and filesystem/partition edge cases—with operational excellence from roles at Reddit, FitAnalytics (Snap), and SoundCloud. Rene has driven performance-focused changes in container runtime tooling (CRI-O) and contributed hardware sensor and CPU metric collectors to Prometheus node_exporter, showing a knack for observability and low-level data integrity. As a tech lead for Data & SRE, he pairs pragmatic leadership with hands-on coding to deliver scalable, production-grade services. Colleagues know him for tackling tricky edge cases (e.g., protective MBR/GPT and SMART raw values) that most teams defer, improving compatibility and long-term reliability. He combines open-source contributions with enterprise impact, making him effective at both product delivery and critical infrastructure improvements.
16 years of coding experience
14 years of employment as a software developer
Stackoverflow
784reputation
101kreached
13answers
1question
Github Skills (41)
monitoring10
kubernetes10
filesystem10
monitor10
partition10
partitioning10
hardware10
system-monitoring10
occi10
go10
prometheus10
sys10
kubernetes-pods10
gpt10
cri-o10
Programming languages (16)
Github contributions (5)
prometheus/node_exporter
Oct 2016 - Jul 2018
Exporter for machine metrics
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:2 reviews, 7 commits, 11 PRs in 1 year 9 months
Contributions summary:Rene contributed to the `node_exporter` project by implementing support for hardware sensor metrics, specifically integrating with the hwmon subsystem on Linux systems. Their work included adding new collectors, modifying existing code to handle sensor data, and writing tests to validate the sensor data collection. Furthermore, the user made architectural changes by refactoring the CPU-related metrics and moving stat_linux functions to cpu_linux. They also addressed the handling of large S.M.A.R.T. raw values within the smartmon.sh script.
exporterprometheus-exportersystem-metricshost-metricssystem-information
diskfs/go-diskfs
Aug 2020 - Aug 2020
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 reviews, 11 commits, 8 PRs in 6 days
Contributions summary:Rene primarily focused on fixing and improving the `go-diskfs` repository's ability to work with various disk partition types and filesystems, particularly FAT32. Their contributions include addressing issues related to GPT partitions, specifically the protective MBR type and partition size calculations. They also corrected backup block writing and other filesystem operations, indicating an emphasis on data integrity and compatibility. These changes involved modifying filesystem structures and algorithms to improve the functionality of the disk filesystem utilities.
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