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Become a sponsor to Henrik Feldt

@haf

Henrik Feldt

haf
Stockholm

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 2

@jcmrva
@ibrahim324
Past sponsors 10
@cartermp
@talkl
@devornottodev
@janisivanoov
@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!

    F# 680
  2. causiq/logary

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

    F# 527
  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 320
  5. haf/linux-intro-course

    A gentle introduction to programming networked services on linux

    F# 112
  6. haf/macos

    A complete macOS dev machine bootstrap repository.

    Shell 20

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28% towards 7 monthly sponsors goal

@jcmrva @ibrahim324

jcmrva and 1 other sponsor this goal

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$ a month

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$7 a month

Select

Individual level

If you're an individual who uses my software in your daily workflow, considering sponsoring me two coffees a month, so I can keep improvements coming.

🏄‍♂️ Perks

  • 📣 At this level, you'll receive a github mention in one of my public repositories
  • 🎬 You'll get personal access to instruction videos

$10 a month

Select

Professional level

If you think I'm doing a good job at maintaining software and answering questions in the issue tracker. Your contribution counts and sends a signal that you get value from my open work.

This tier is great if you're a person who is consulting or running a personal business.

🏄‍♂️ Perks

  • 📣 At this level, you'll receive a github mention in one of my public repositories
  • 🎬 You'll get personal access to instruction videos
  • ❓You will also get a 20 minutes Questions-and-Answers Google Hangouts with me on six occasions

$75 a month

Select

🏢 Business level

If you're running a business using my software, this is the level for you!

🏄‍♂️ Perks

  • 📣 At this level, you'll receive a github mention + business logo, in one of my public repositories
  • 🎬 You'll get personal access to instruction videos
  • ❓You will also get a an hour of QnA via Google Hangouts with me every month for a year

$750 a month

Select

🥇 Booster of open source level

You're running a business with a team of developers. Or you want to see what I can do if I get proper working-hours time to spend on open source; this tier is for you.

🏄‍♂️ Perks

  • 📣 At this level, you'll receive a github mention + business logo, in one of my public repositories
  • 🎬 You'll get personal access to instruction videos
  • ❓You will also get a an hour of QnA via Google Hangouts with me every month for a year
  • ❗️I will prioritise your feature requests when deciding what to do next for open source projects