Terence Hinrichsenterence ~ $

Somerset West, South Africa

Terence Hinrichsen

Software developer

I build software that has to keep working long after the excitement wears off: line-of-business systems in F# and .NET by day, and apps for the church and running-club communities I belong to the rest of the time.

See the workAbout me

Terence Hinrichsen

terence.fsxF# · UTF-8
type Developer =    { Name      : string      Based     : string      Day       : string      Evenings  : string list      Languages : string list } let terence =    { Name      = "Terence Hinrichsen"      Based     = "Somerset West, South Africa"      Day       = "line-of-business systems that must keep working"      Evenings  = [ "church hymn tooling"; "running-club software" ]      Languages = [ "F#"; "C#"; "Dart"; "TypeScript" ] } terence |> shipIt   // since 2017

I build software that has to keep working long after the excitement wears off. F# and .NET by day; Flutter and Astro for the communities I belong to the rest of the time.

ls ./projectscat about.mdgithub ↗
All projects →all 10 →

NAC Virtual Accompanist

A mobile app that plays full organ accompaniments for hymns, so congregations without an organist can still sing.

  • Proof of concept
  • 2026
  • Flutter · Dart · Riverpod · just_audio · Python · FluidSynth

Tuner & Pitch Pipe

An Android app for musicians: a real-time chromatic tuner and a pitch pipe in one, built around a hand-written YIN pitch detector.

  • Live
  • 2026
  • Flutter · Dart · Material 3 · just_audio

NACMIRS

The New Apostolic Church Music Information & Resource System: hymn scheduling, service programmes and music resources for congregations across Southern Africa.

  • Live
  • 2025
  • F# · Fable · React · Supabase · PostgreSQL · Azure

StockPro

Stock control and field jobs for HVAC and refrigeration teams: parts on every van, jobs assigned to a technician, and a signed job report from the client's site, even with no signal.

  • Live
  • 2026
  • React · TypeScript · Supabase · Capacitor · PWA

What I work withtype Skills =

Languages
F# · C# · TypeScript · Dart · SQL · Python
Frameworks
.NET · SAFE Stack · Fable · Flutter · Astro · Next.js · React
Data
SQL Server · PostgreSQL · Supabase · Sage Evolution
Ships with
Git · GitHub Actions · Vercel · cPanel · Android
{ Languages : "F#" | "C#" | "TypeScript" | "Dart" | "SQL" | "Python"  Frameworks: ".NET" | "SAFE Stack" | "Fable" | "Flutter" | "Astro" | "Next.js" | "React"  Data      : "SQL Server" | "PostgreSQL" | "Supabase" | "Sage Evolution"  Tooling   : "Git" | "GitHub Actions" | "Vercel" | "cPanel" | "Android"}

Writing$ git log --oneline blog/

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  1. Hello, hinrichsen.me

    Why I finally set up a personal site, what lives here, and what it is built with.

    1 min read