Fabian Stäber
Senior Engineering Manager at Grafana Labs
Munich, Bavaria, Germany
Summary
🤩
Rockstar🎓
Top SchoolFabian Stäber is a Senior Engineering Manager with 14 years of experience building and leading teams in application observability, currently co-heading Grafana Labs’ Application Observability efforts. He is a long-standing Prometheus contributor and maintainer of the Prometheus Java client, bringing deep hands-on expertise in JVM metrics, OpenTelemetry, and eBPF. Fabian combines people leadership with practical engineering—previously managing multiple core Java backend teams at Instana and driving architecture and R&D at ConSol—while still shipping critical code such as quantiles for Prometheus summaries and improvements to jmx_exporter. A regular conference speaker and community organizer (Grafana & Friends, FOSDEM devroom), he bridges open source stewardship and product-focused delivery. Based in Munich, he pairs academic roots in computer science with a track record of improving observability tooling and cross-version Java compatibility.
14 years of coding experience
13 years of employment as a software developer
Dipl.-Inf. Computer Science, Dipl.-Inf. Computer Science at FAU Erlangen-NürnbergComputer Science, Computer Science at KTH Royal Institute of Technology
Stackoverflow
992reputation
57kreached
10answers
9questions
Github Skills (26)
data-collection10
testing10
java10
javas10
go10
prometheus10
jmx10
java-agent10
maven10
metric10
data-structure9
algorithm9
algorithms9
dockers9
instrumentation9
Programming languages (14)
Github contributions (5)
fstab/grok_exporter
Apr 2016 - Apr 2021
Export Prometheus metrics from arbitrary unstructured log data.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:22 releases, 429 commits, 20 PRs in 5 years
Contributions summary:Fabian's commits primarily focused on fixing and refactoring code related to metrics collection within the `grok_exporter` project. They addressed issues such as incorrect package names and added or refactored functions and data structures related to metric functionality. The user's work included changes to configuration, testing, and metric creation, suggesting involvement in the core application logic.
prometheus
prometheus/client_java
Aug 2016 - Jan 2023
Prometheus instrumentation library for JVM applications
Role in this project:Backend Developer
Backend DeveloperContributions:17 releases, 171 reviews, 134 commits in 6 years 6 months
Contributions summary:Fabian added quantiles to the summary metric, mirroring the algorithm from the client_golang library. They implemented a CKMSQuantiles class, adapting existing code from an external source. Further contributions include documenting implications of negative observations for summaries and histograms and fixing a test. These commits focus on improving the library's metric capabilities.
jvmprometheusinstrumentationjavametrics
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