Hazel Weakly

Fellow at the Nivenly Foundation

Hazel spends her days building out teams of humans as well as the systems and tooling to make life better for others. She currently serves as a Director of the Haskell Foundation, as a Fellow of the Nivenly Foundation, and is fondly known as the Infrastructure Witch of Hachyderm (a popular Mastodon instance).

Posts by this Author ( 4 )

observability

27 August 2025 • 11 min read

Building an ergonomic OpenTelemetry for JavaScript

OpenTelemetry’s model of traces and spans does not fit well with JavaScript’s event loop-driven design, so how to improve support for the browser?

OpenTelemetry

14 July 2025 • 9 min read

Setting up OpenTelemetry on the frontend because I hate myself

Frontend developers deserve so much better from OpenTelemetry, especially since they stand to benefit so much.

OpenTelemetry

10 June 2025 • 6 min read

OpenTelemetry challenges: Handling long-running spans

The solution to long-running spans in OpenTelemetry is more creative than “don’t have long-running spans.” Learn how to address this common problem.

observability

10 June 2025 • 7 min read

The 4 evolutions of your observability journey

The known/unknown matrix can be incredibly helpful in understanding where you are with your observability implementation.