Oliver Havis

I'm a software engineer in Lincoln. Day to day I build backend systems in PHP, with Symfony at Wren Kitchens and Laravel on my own products. For my dissertation I trained a fall detection model and built it to run on a Raspberry Pi.

Selected work

2025

Fall detection on edge hardware

My dissertation. A computer vision model that spots falls from a webcam feed and alerts a carer, built to run on a Raspberry Pi.

92% accuracy across five posture classes, on 1,736 held-out test images.

  • Python
  • TensorFlow
  • MobileNetV2
  • TFLite
  • OpenCV
  • Grad-CAM

2023 to now

Perform Data Track

An exam management platform for performing-arts awarding bodies: candidate entry, examiner marking and certificates in one system.

  • Laravel 12
  • PHP 8.2
  • Livewire
  • Alpine
  • Tailwind
  • MySQL

2026

Area Risk Snapshot

Type in a UK postcode, get an honest summary of recently reported street crime nearby, from police.uk open data.

  • Laravel 13
  • Livewire 4
  • PHP
  • SQLite
  • PHPUnit

2024 to now

Client systems at havis.dev

Two builds from my own practice: a learning platform for a university department, and a website rebuild for a dance awarding body.

  • Laravel
  • Livewire
  • Canvas LMS API
  • OAuth
  • Next.js

2022

Hand gesture volume control

Pinch your thumb and finger closer or further apart in front of a webcam and the Mac volume follows.

  • Python
  • OpenCV
  • MediaPipe

Experience

  1. Jan 2026 to nowSystems Developer, Wren Kitchens
  2. 2024 to nowIndependent developer, havis.dev
  3. Jun 2022 to Jan 2026Mid Web Developer, We Create Digital
  4. Feb 2022 to Aug 2024Software Developer (freelance), Global Agent Networks
  5. Sep 2019 to Aug 2021Full Stack Developer, Independent Dance Training
  6. 2021 to 2025Software Engineering, Bournemouth University

The full CV has the detail