Fabian Reinartz
Software Engineer at Cradle
Switzerland
Summary
🤩
Rockstar🎓
Top School
Top expert inCloud-Native DevOps with Kubernetes
Fabian Reinartz is a seasoned software engineer with 11 years of experience building and operating cloud-native monitoring and storage systems, currently based in Switzerland. He has held senior engineering roles at Google and Databricks and now works at Cradle, bringing deep hands-on expertise in Prometheus, Kubernetes, and distributed storage. Fabian is a prolific open-source contributor across flagship CNCF projects—Prometheus, Thanos, kube-state-metrics and the Prometheus Operator—where he’s implemented core controller logic, TSDB improvements, and monitoring integrations with Grafana and GCS. His work blends backend systems engineering, DevOps, and test automation, with notable contributions to metric instrumentation, alerting rules, and reliable long-term storage. Colleagues rely on him for pragmatic refactors and careful testing that improve observability at scale. He pairs academic foundations from Edinburgh and Universität des Saarlandes with a track record of shipping production-grade infrastructure.
11 years of coding experience
10 years of employment as a software developer
Computer Science, Computer Science at The University of EdinburghBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Universität des Saarlandes
English, German
Github Skills (46)
monitoring10
json10
kubernetes10
docker10
back-end-development10
data-integrity10
api-design10
testing10
data-serialization10
alerts10
data-structure10
serialization10
google-cloud-storage10
go10
prometheus10
Programming languages (15)
Github contributions (5)
prometheus/common
Jun 2015 - Nov 2017
Go libraries shared across Prometheus components and libraries.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:103 commits, 39 PRs, 94 pushes in 2 years 5 months
Contributions summary:Fabian contributed to the Prometheus common library, primarily focused on the `model` package. Their commits involved importing dependencies from the `client_golang` library, indicating integration work with the Prometheus client. Furthermore, the changes in `signature_test.go` demonstrate a focus on testing and verifying functionalities related to metric signatures and fingerprints. The contributions reveal development activity within core data structures and functionalities used by Prometheus components.
golangmetricsshared-librariesprometheus
prometheus/prometheus
Jan 2015 - Jan 2019
The Prometheus monitoring system and time series database.
Role in this project:Back-end Developer
Back-end DeveloperContributions:40 releases, 1750 commits, 890 PRs in 3 years 11 months
Contributions summary:Fabian was involved in refactoring and enhancing the Prometheus TSDB's internal storage. They contributed to the core functionality, including index management, chunking, and series data serialization by modifying existing code. Furthermore, the user implemented the features in the writer package like adding the CRC32 checksums to various parts in the codebase, ensuring data integrity. The user also made significant improvements to the query process, which is evident from the changes related to postings list operations, along with implementing the new storage APIs.
time-series-databaseprometheus-exporterseries-databasealertingdatabase
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