About the author
Felix joined Elastic in 2018 where he built the Elastic APM Java agent from the ground up. Two years in, he took the role of the tech lead for the APM Agents team. Another two years later, he became tech lead of application observability. Since Oct 2023, Felix is a floating tech lead in observability, focusing on strategical initiatives, such as working with other teams to make Elasticsearch the best place to store your observability signals. Felix is also a passionate home barista and loves practicing latte art.
Author's articles
Don't leave metrics on the table: query them with the ES|QL TS command
Recalibrate your mental model for time series queries: learn why FROM can produce inaccurate results for metrics, how TS fixes that, and when to use each command.
May 11, 2026
Bringing Fire to Elasticsearch: Adding Native Prometheus API Support
Query Elasticsearch directly from Prometheus-compatible clients via native PromQL, discovery, and metadata endpoints. Send data to Elasticsearch with Prometheus Remote Write.
May 7, 2026
30x faster than Prometheus: How we rebuilt Elasticsearch as a leading columnar metrics datastore
Elasticsearch now stores OTel metrics at 3.75 bytes per data point and queries them up to 30x faster than Prometheus. Here's how we rebuilt TSDS and ES|QL.