Simon Holliday

About Me

I'm a Senior Technologist and photographer based in Bristol, UK. I explore the world through code, sound, and image.

My work connects the physical and digital worlds - taking inputs from the analogue environment, transforming them through code, and producing meaningful, reliable outputs. From investigating AI safety to documentary photography, I am always exploring new ways to understand and analyze the world.

I am driven by a curiosity to understand the world and a desire to create meaning from it. Whether writing code using complex data systems, immersing myself in electronic music production, or scanning for radio signals, I am always exploring how we interact with our environment. I love the synthesis of technical discipline and creative expression.

With 30 years of experience delivering complex technical systems for household names, I specialise in architecting the software that makes data valuable. While I work primarily in Python today, I draw on broad experience with C, Go, PHP, and JavaScript to build the secure, scalable foundations that allow information to flow reliably. I currently work with Anomify on data analysis and AI safety, and developed passive SONAR techniques for a project led by DSTL.

My interest extends to Generative AI and the physical world. I am developing a novel approach to AI safety that replaces probabilistic AI guardrails with deterministic mathematical verification in embedding space - addressing the fundamental cost, latency, and jailbreak vulnerabilities of current industry solutions.

I have also prototyped hardware sensors using Micropython, and written Python software to decode environmental signals from bio-acoustics to radio telemetry. For me, software is a medium for exploration - a way to bridge the gap between the digital and the physical, or to find the human story within a dataset. In 2003, I created what became the world's largest database of human word associations, and more recently built the Turbo Island visitor information site.

My background is as diverse as my current work. Since graduating from Bristol University with a BA in Philosophy, I have worked with many media, advertising, and technology businesses. I co-founded a record label and an online media agency, worked on campaigns for the digital arm of a major global ad agency, and until 2019 led the technical team and architected the ad-serving platform at an online ad-tech company.

I have built and managed development teams, recruiting, interviewing, and hiring engineers, as well as setting architectural direction and chairing daily standups.

I have been privileged to work with clients including the BBC, DDB London, Derren Brown, Future Publishing, The Guardian, Hat Trick Productions, Ministry of Sound, The Musicians' Union, Objective Productions, Smirnoff, Tesco, and Volkswagen.

Photography remains a key part of how I observe the world - documenting the music scene, capturing distinctive portraits, and supporting community activism.

Current Projects

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