// havox.org - v4
+John Gatward
+Software Engineer
++ Backend engineerby trade + Developer enthusiastby curiosity + Unofficial family cloud engineerby necessity +
+
+ View projects
+ Contact me
+
+
-
-
- about
-Havox & me
-
-
-
-
+
-
-
- - Havox started in 2017 as a place to dump whatever projects I had - written. Four redesigns and several dead domains later, it's still - going. Less a portfolio, more a scrapbook. -
-
- day job
-
-
- - Backend engineer at Sainsbury's Supply Chain - & Logistics. It's good fun. -
-
- dev
-
-
- - Fascinated with new languages, frameworks, and shiny tech I - probably don’t need. Constantly learning just enough to build - something slightly cooler next time. -
-
- linux
-
+
+
- Long-time Linux user and distro-hopper. Self-hosted server running
- 24/7 for friends and family who didn't ask for it but
- probably definitely appreciate it.
-
+
-
- about
+Havox & me
-
version history
-
-
-
-
-
+
- Havox V4 current
-
- 2026 → present
-
- Catppuccin Mocha. Single page. Professional.
-
-
+
+
+
+
-
-
- + Havox started in 2017 as a place to dump whatever projects I had + written. Four redesigns and several dead domains later, it's + still going. Less a portfolio, more a scrapbook. +
-
- Havox V3 ↗
-
- 2022 → 2025
-
- Borrowed a professional template and tried to make it suit my
- needs. Wasn't very 'me'.
+
+
+
+
+ day job
+
+
+ + Backend engineer at Sainsbury's Supply Chain + & Logistics. It's good fun. +
+
+ dev
+
+
+ + Fascinated with new languages, frameworks, and shiny tech I + probably don’t need. Constantly learning just enough to build + something slightly cooler next time. +
+
+ linux
+
+
+ Long-time Linux user and distro-hopper. Self-hosted server
+ running 24/7 for friends and family who didn't ask for it but
+ probably definitely appreciate it.
+
+
-
+
version history
+
+
-
+
-
+
-
-
+
+
-
-
-
-
+
+ Havox V4 current
+
+ 2026 → present
+
+ Catppuccin Mocha. Single page. Professional.
+
-
-
+
-
-
-
-
-
- Havox.org ↗
+
+
+
+
-
+ Umbra.cyou ↗
+
+ 2019 → 2022
+
+ Built from the ground up focusing on a minimal clean design.
+ Stole my code VS Code theme for a colour palette.
+
2016 → 2019
-
- Wrote the entire site in one php file. Hosted on a £1/year
- VPS.
+
+
+
+
+
-
+
+
+
-
+ Havox.org ↗
+
+ 2016 → 2019
+
+ Wrote the entire site in one php file. Hosted on a £1/year
+ VPS.
+
skills
-- What I know -
+ +skills
++ What I know +
-
-
-
- 
-
-
-
- Backend
-- Professional experience designing, building and deploying services. - Using a modern tech stack in the Supply Chain & Logistics industry. -
-
- Java
- Spring Boot
- AWS
- Kafka
- MongoDB
+
+
-
+
+
+
+
+
+
+ Backend
++ Professional experience designing, building and deploying + services. Using a modern tech stack in the Supply Chain & + Logistics industry. +
+
+ Java
+ Spring Boot
+ AWS
+ Kafka
+ MongoDB
+
+
+
+ 
+
+
+
+
+ Frontend & Creative
++ Comfortable with React and CSS. I've always enjoyed visualising + algorithms interactively - it's way more fun than a console + output. +
+
+ React
+ TypeScript
+ HTML/CSS
+
+
+
+ 
+
+
+
+
+ Systems & Infra
++ Long-term Linux & Vim user. Self-hosted web & media servers. Using + industry practices when it comes to networks & security. +
+
+ Linux
+ Docker
+ Self-Hosting
+ Wireguard
+
+
+
+ 
+
+
+
+ Academic Breadth
++ C, C++, x86_64 assembly, Haskell, R & MatLab from uni. Modules + in Advanced networking, algorithms, compilers, graphics, + cryptography, malware analysis & many more. +
+
+ C / C++
+ Haskell
+ Algorithms
+ Security
+ Low Level OS
+
-
-
-
-
-
-
- Frontend & Creative
-- Comfortable with React and CSS. I've always enjoyed visualising - algorithms interactively - it's way more fun than a console output. -
-
- React
- TypeScript
- HTML/CSS
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
+
+
-
- Systems & Infra
-- Long-term Linux & Vim user. Self-hosted web & media servers. Using - industry practices when it comes to networks & security. -
-
- Linux
- Docker
- Self-Hosting
- Wireguard
-
+
+
+
+
+
+ projects
++ Things I built +
++ A timeline of my projects and an overview of my journey as a + developer. Often inspired by something cool I saw and set out to + recreate. +
+ +
+ Featured projects
+
-
-
-
-
+
-
-
- Academic Breadth
-- C, C++, x86_64 assembly, Haskell, R & MatLab from uni. Modules - in Advanced networking, algorithms, compilers, graphics, - cryptography, malware analysis & many more. -
-
- C / C++
- Haskell
- Algorithms
- Security
- Low Level OS
+
+ 9 Feb 2025
+ Active development
+ Wordle Solver
+ Built after one too many missed 3-guess games. Now it plays
+ marginally better than me. Uses information theory to recommend
+ the next best guess.
+
+ Source code:
+ API
+ ·
+ Frontend
+
+
+ Rust
+ React
+ TypeScript
+
+
+
+ 13 Apr 2024
+ Active development
+ Crack the Quote
+ A substitution-cipher puzzle game with a daily challenge. Built
+ for me and my family to play after getting bored with NYT
+ games.
+
+ Source code:
+ API
+
+
+ Rust
+ React
+ JavaScript
+
+
+
+
+
+ All projects
+
+
+
+
+
+
+ 03 Apr 2025
+ Pub Quiz Dashboard
+ A Python dashboard to track our local pub quiz
+ performances.
+
+ Python
+
+
+
+ 14 Nov 2024
+ Thin Ice
+ A small browser tile game inspired by one I played growing
+ up.
+
+ C++
+ WebAssembly
+ Raylib
+
+
+
+ 20 Mar 2024
+ Travelling Salesman Problem
+ A nearest-neighbor + 2-opt visualiser. Wanted to revisit one of
+ my first projects with an optimised tech stack and
+ algorithm.
+
+ Zig
+ WebGL
+ WebAssembly
+
+
+
+ 31 Jan 2024
+ Flocking
+ Rewrote the project from Go to Rust, compiling it to WebAssembly.
+ Was fun being able to use DOM controls to affect the
+ simulation.
+
+ Rust
+ Raylib
+
+
+
+ 1 Nov 2023
+ Active development
+ samstoreymusic.com
+ A website design and build for a friend working in music. Saving
+ him the hosting fees :)
+
+ HTML/CSS
+ JavaScript
+
+
+
+ 21 Jul 2023
+ Game of Life
+ After building Conway's Game of Life in p5.js as one of my first
+ projects, I expanded it into a generic automata simulator.
+
+ React
+ JavaScript
+
+
+
+ 5 Feb 2022
+ Percolation
+ Watched a brilliant video by
+ Spectral Collective
+ and just had to recreate it.
+
+ C
+ Raylib
+ WebAssembly
+
+
+
+ 1 Oct 2021
+ Drawing Bézier curves
+ An interactive animation for how cubic Bézier curves are
+ constructed. Inspired by this beautiful video by
+ Fraya Holmér
+
+ JavaScript
+ p5.js
+
+
+
+ 17 Sep 2021
+ 2D Marching Squares
+ I saw the 3D version of this algorithm in a game dev log and was
+ inspired to create this 2D land-and-sea map generator.
+
+ JavaScript
+ p5.js
+
+
+
+ 2 Apr 2020
+ Müller-Lyer illusion
+ JavaScript visualisation of the Müller-Lyer optical
+ illusion.
+
+ JavaScript
+ p5.js
+
+
+
+ 27 Feb 2019
+ Fourier series
+ Builds a square wave from sine components to show Fourier series
+ in motion.
+
+ JavaScript
+ p5.js
+
+
+
+ 23 Feb 2019
+ Constructing an ellipse
+ A geometric construction demo inspired by
+ 3Blue1Brown's video
+ on Feynman's lost lecture.
+
+ JavaScript
+ p5.js
+
+
+
+ 18 Mar 2018
+ Calculating Pi
+ A Monte Carlo approximation of pi using random sampling.
+
+ JavaScript
+ p5.js
+
+
+
+ 17 Dec 2017
+ Oscillations in 3D
+ A JavaScript recreation of a Bees and Bombs animation.
+
+ JavaScript
+ p5.js
+
+
+
+ 13 Nov 2017
+ Maze generator
+ Discovered the
+ Coding Train's channel
+ and learnt coding through following along.
+
+ JavaScript
+ p5.js
+
+
+
+
+
+
+
+
+
+
+
+
+ contact
+
+
-
+
+
Let's talk
++ I am currently employed and open to the right software engineering + opportunity, particularly backend or full-stack roles with + friendly, close-knit teams. +
+For professional enquiries, connect with me on LinkedIn.
+projects
-- Things I built -
-- A timeline of my projects and an overview of my journey as a developer. - Often times getting inspired and trying to recreate something cool I - saw. -
- -
- Featured projects
-
-
-
-
- 9 Feb 2025
- Active development
- Wordle Solver
- Built after one too many missed 3-guess games. Now it plays
- marginally better than me. Uses information theory to recommend the
- next best guess.
-
- Source code:
- API
- ·
- Frontend
-
-
- Rust
- React
- TypeScript
-
-
-
- 13 Apr 2024
- Active development
- Crack the Quote
- A substitution-cipher puzzle game with a daily challenge. Built for
- me and my family to play after getting bored with NYT games.
-
- Source code:
- API
-
-
- Rust
- React
- JavaScript
-
-
-
-
-
- All projects
-
-
-
-
-
-
- 03 Apr 2025
- Active development
- Pub Quiz Dashboard
- A Python dashboard to track our local pub quiz performances.
-
- Python
-
-
-
- 14 Nov 2024
- Thin Ice
- A small browser tile game inspired by one I played growing
- up.
-
- C++
- WebAssembly
- RayLib
-
-
-
- 20 Mar 2024
- Travelling Salesman Problem
- A nearest-neighbor + 2-opt visualiser. Wanted to revisit one of my
- first projects but with a super optimised tech-stack &
- algorithm.
-
- Zig
- WebGL
- WebAssembly
-
-
-
- 31 Jan 2024
- Flocking
- Rewrote the entire project in Rust from GoLang to compile to wasm.
- Was fun being able to use DOM controls to affect the
- simulation.
-
- Rust
- Raylib
-
-
-
- 1 Nov 2023
- Active development
- samstoreymusic.com
- A website design and build for a friend working in music. Saving
- him the hosting fees :)
-
- HTML/CSS
- JavaScript
-
-
-
- 21 Jul 2023
- Game of Life
- After building Conway's Game of Life in p5.js as one of my first
- projects, I expanded it into a generic automata simulator.
-
- React
- JavaScript
-
-
-
- 5 Feb 2022
- Percolation
- Watched a brilliant video by
- Spectral Collective
- and just had to recreate it.
-
- C
- RayLib
- WebAssembly
-
-
-
- 1 Oct 2021
- Drawing Bézier curves
- An interactive animation for how cubic Bézier curves are
- constructed. Inspirated by this beautiful video by
- Fraya Holmér
-
- JavaScript
- p5.js
-
-
-
- 17 Sep 2021
- 2D Marching Squares
- I saw the 3D version of this algorithm in a game dev log and was
- inspired to create this 2d land/sea map generator thing.
-
- JavaScript
- p5.js
-
-
-
- 2 Apr 2020
- Müller-Lyer illusion
- JavaScript visualisation of the Müller-Lyer optical illusion.
-
- JavaScript
- p5.js
-
-
-
- 27 Feb 2019
- Fourier series
- Builds a square wave from sine components to show Fourier series in
- motion.
-
- JavaScript
- p5.js
-
-
-
- 23 Feb 2019
- Constructing an ellipse
- A geometric construction demo inspired by
- 3Blue1Brown's video
- on Feynman's lost lecture.
-
- JavaScript
- p5.js
-
-
-
- 18 Mar 2018
- Calculating PI
- A Monte Carlo approximation of pi using random sampling.
-
- JavaScript
- p5.js
-
-
-
- 17 Dec 2017
- Oscillations in 3D
- A JavaScript recreation of a Bees and Bombs animation.
-
- JavaScript
- p5.js
-
-
-
- 13 Nov 2017
- Maze generator
- Discovered the
- Coding Train's channel
- and learnt coding through following along.
-
- JavaScript
- p5.js
-
-
-
-
-
-
-
- contact
-
-
-
-
-
- Let's talk
-- I am currently employed and open to the right software engineering - opportunity, particularly backend or full-stack roles with friendly, - close-knit teams. -
-For professional enquiries, please contact me on LinkedIn.
-