About

I'm Phil — 20 years in software development, team leadership, and agile methods. I've been building products from A to Z for startups and scale-ups as a technical co-founder and CTO.

Rentier Digital is where I share what I know about building real products with AI. Not theory — practical guides, tools, and methods for solo builders and non-technical founders who want to ship.

What I do

• Full-stack architecture (React, Next.js, Supabase, Convex)
• AI-assisted development workflows
• Technical SEO and automation (n8n)
• CTO-as-a-service for non-technical founders

The Prompt Contract method

I developed Prompt Contract — a method to structure AI prompts like development contracts. Instead of hoping AI understands your intent, you contractualize expectations: stack, constraints, architecture, validation criteria.

Get in touch

Find me on GitHub.