Jerome Gill

Software engineer in Tenerife

I'm a software engineer with fifteen years' experience building products and leading teams, from founding developer at a SaaS start-up to Head of Engineering at a Spanish software agency.

These days I'm a backend developer at Vizzuality, building tools for sustainability and conservation. I write here about software, AI-assisted development and whatever else I'm tinkering with.

Data journalism
OSINT
Civic tech
NLP
Tech & AI policy
Rock climbing
Conservation

Writing

All posts →

Sep 2026 Crossing The Antimeridian with PostGIS
Jul 2026 Maintaining a reading list with claude
Jul 2026 Revoking GH CLI oauth token
Jul 2026 More vibe porting
May 2026 Extending .gitignore for a set of non-versioned ignores

Work

2026 – now

Backend Developer · Vizzuality

Platforms for sustainable land use and carbon credits for agroforestry smallholders.
2022 – 2026

Head of Engineering · Secret Source

Engineering culture, mentoring and pre-sales; hands-on lead on AI search, RAG and agentic projects.
2020 – 2022

Senior Software Developer · Secret Source

Led the team behind a supply-chain sustainability platform for supermarkets, later acquired.
2015 – 2019

Founding Software Developer · OurPeople

Prototype to product through three funding rounds as the team grew from 2 to 15.
2014 – 2015

Software Developer · Justcollecting

Recovered and rebuilt an inherited codebase: responsive redesign, REST API, security fixes.
2013 – 2014

Developer · BoxUK

Agency projects including the BCS website and heritage web-mapping for Somerset.