Skip to content
You must be logged in to sponsor haf

Become a sponsor to Henrik Feldt

My name is Henrik and I've been writing software for the world to use since 2004. I love getting in the flow while writing software that is fun for my fellow engineers to use.

My ultimate goal is spending my time improving the world with software, continuously applying what I learn to improve it and make it more fun (smooth!) to use! I love the feeling of reading about or talking with happy users of my projects!

Strong testing methods for everyone!

I maintain Expecto, a F# .Net [ unit/stress/property ] testing library. If I had more time with it (through sponsorships) I could afford to start implementing all the wonderful papers I read about coverage/static code analysis-guided fuzzing, and create more integrations with load- and stress-testing frameworks.

Open source / inexpensive, self-hosted analytics/metrics/logging/tracing

Secondly, I maintain and improve Logary, a JavaScript, F# and C# [ metrics | tracing | logging ] [ library | ingestion | analytics | log-router ] that expose a unified surface area for all of the above for the cloud-native software stack. All of the Logary suite is free to use; but the .Net client library, which costs a few dollars; if and only if you're running a for-profit company and for the nodes running in production.

If I had sponsorship for Logary I would be able to move much faster — that would mean drastically improving the docs and making realtime business analytics and metrics/tracing much more approachable to developers in all different sorts of languages.

So far, I've had implementations in Swift, Kotlin, JavaScript, TypeScript, C#, F#, C++ and Go use the API's that Logary expose, and it would be great to provide open source clients or configs for all those languages to log/trace/do metrics with.

Your contribution matters

Even though I feel passionate about the above projects, they are all maintained on my spare time. I would love to work more focused on open source. If you appreciate what I'm doing; even if you can only contribute a small amount, it would make a world of difference to me❣️

@haf

For this next level I'm planning releasing one about how to do test async values (Task, Job/Alt, Async) — I hope you're enjoying the video series and the glimpses of Sweden at the end of each 🔆

Current sponsors 1

@jcmrva
Past sponsors 11
@cartermp
@talkl
@devornottodev
@janisivanoov
@ibrahim324
@ninjarobot
@ameier38
@Kuass
@github
@MaxWilson
Private Sponsor

Featured work

  1. haf/expecto

    A smooth testing lib for F#. APIs made for humans! Strong testing methodologies for everyone!

  2. causiq/logary

    Logs and metrics are one! Professional logging, metrics and analytics for your apps.

  3. causiq/sdk

    A browser JavaScript client for Logary or any other HTTP server you wish to send to.

    TypeScript 10
  4. haf/Http.fs

    A simple, functional HTTP client library for F#

    HTML 321
  5. haf/linux-intro-course

    A gentle introduction to programming networked services on linux

  6. haf/macos

    A complete macOS dev machine bootstrap repository.

    Shell 20

14% towards 7 monthly sponsors goal

@jcmrva

jcmrva sponsors this goal

Select a tier

$ one time

Choose a custom amount.