Juraj Michálek
Senior Solutions Architect at Grafana Labs
Madrid, Community of Madrid, Spain
Summary
🤩
Rockstar🎓
Top SchoolJuraj Michálek is a Senior Solutions Architect based in Madrid with 11 years of experience designing and operating large-scale observability and monitoring platforms. He has led migrations to vendor-neutral OpenTelemetry pipelines, built federated Prometheus/Thanos deployments ingesting hundreds of billions of metrics, and driven cost- and reliability-focused observability initiatives across companies like Matillion, Medallia, and Swiss Re. An active contributor to prominent open-source projects, he has implemented Prometheus remote write features in the OpenTelemetry Collector and extended Grafana Mimir’s OTLP metrics and alerting capabilities. Juraj combines hands-on backend and DevOps engineering with practical architecture work, frequently turning complex ingestion and metadata translation problems into maintainable production systems. A detail-oriented pragmatist, he often surfaces subtle interoperability fixes (e.g., HTTP 429 retries and metric translation nuances) that materially improve observability reliability.
11 years of coding experience
8 years of employment as a software developer
High School Diploma Information Technology, High School Diploma Information Technology at Gymnázium Viliama Paulinyho-Tótha
English, Slovak, Czech
Github Skills (22)
observability10
go10
prometheus10
opentelemetry10
otel10
metric10
alerts9
testing9
alertview9
alertdialog9
alertifyjs9
microservices8
microservices-application8
configuration-management7
jsonnet7
Programming languages (16)
Github contributions (5)
grafana/mimir
Mar 2022 - Oct 2024
Grafana Mimir provides horizontally scalable, highly available, multi-tenant, long-term storage for Prometheus.
Role in this project:
Backend Developer & DevOps Engineer
Backend Developer & DevOps EngineerContributions:28 reviews, 11 PRs, 65 comments in 2 years 7 months
Contributions summary:Juraj primarily focused on enhancing the Grafana Mimir project's capabilities related to OTLP metrics ingestion, implementing metadata translation and storage features. They also contributed to the configuration of alerts within the Mimir mixin, introducing features to make range intervals and other alert parameters configurable. Additionally, the user improved the codebase by adding spans and enhancing code readability, further ensuring the reliability and maintainability of the project.
tenantobservabilitygrafanaprometheusstorage
open-telemetry/opentelemetry-collector-contrib
Jun 2022 - Mar 2025
Contrib repository for the OpenTelemetry Collector
Role in this project:Backend Developer
Backend DeveloperContributions:91 reviews, 18 PRs, 169 comments in 2 years 9 months
Contributions summary:Juraj primarily contributed to the `prometheusremotewrite` exporter within the OpenTelemetry Collector Contrib repository. Their work includes adding features like retrying on HTTP 429 errors and fixing metric comparison functions. They also implemented initial support for Prometheus remote write 2.0, specifically focusing on translating gauge metrics. Furthermore, the user made several updates to support various metrics from prometheusreceiver.
contribopentelemetry-collectortracingtempoobservability
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