Perihelion
AI consultancy for companies that want to ship.
Perihelion is run by Will Jones, formerly CTO and cofounder of Sano Genetics. After 7 years building a 20-strong engineering team in healthtech, I now help companies build AI-powered products and internal tools at speed.
I work with startups, scale-ups and enterprise teams across fintech, healthtech and SaaS. If you can describe what you need, I can probably build it faster than you'd expect.
What I do
- AI product engineering - from prototype to production
- Agent systems - autonomous workflows, tool use, multi-agent architectures
- Early-stage CTO coaching - hiring, culture, technical strategy
- AI integration - helping existing teams adopt AI into their stack
Projects
🎙️ Retinue
Ambient AI research assistant. Listens to conversations in real-time, detects key moments, and dispatches AI agents to research, fact-check, and surface relevant information as you talk.
👻 Boggart · boggart.ai
Hyper-personalised content generator. Ingests your digital footprint via Google services, builds a psychological profile with Claude, then generates tailored advertising - copy, images, and video. Because the best ad is the one that actually understands you.
💧 Distillation · distillation.app
Personalised knowledge synthesis. Consolidates information across the entire internet and synthesises it into pristine, information-rich knowledge tailored to your interests and goals. What you choose to read becomes more important than how much you read.
🏎️ Slipstream
High-performance Polymarket × Binance latency arbitrage bot built in Rust. Exploits price discrepancies across prediction markets and crypto exchanges at speed.
💷 LifetimeTax · lifetimetax.co.uk
Lifetime UK tax contribution calculator. Connects to HMRC via OAuth to pull your real employment and tax history, then calculates exactly how much you've paid over your lifetime.
🤖 AgentFix
Auto-fix errors in your dev server as they happen using AI. Watches your terminal, catches the error, feeds it to Claude or Cursor, and applies the patch. Zero context-switching. Built at the Build With Cursor hackathon.
🤫 Thiel Secrets · thielsecrets.com
A matching app built around Peter Thiel's contrarian question: "What important truth do very few people agree with you on?" Share your secret, swipe through others, get matched with people who see the world the same way.
🆘 HelpMe AI
Voice and image-powered AI assistant. Transcribes speech with Whisper, reads screenshots with OCR, and answers questions using GPT. Built for hands-free, eyes-free help.
📝 DocTweak
A Google Docs add-on that lets you rewrite, edit, and transform text with AI directly in the sidebar. Select text, describe what you want, get it back instantly.
Clients
Working with fintechs, healthtechs and startups across the UK. If you're building something interesting and need experienced AI engineering, I'd love to chat.
Get in touch
- Email: williamgdjones[at]gmail.com
- X: @willgdjones
- LinkedIn: willgdjones
- GitHub: willgdjones