Full-stack engineer

GuillaumeBarra

I build high-quality web platforms engineered to scale, and ship AI-powered workflows that compound over time. Currently building and scaling Ffern (opens in new tab)'s web platform in London.

I have extensive experience building scalable web platforms, shipping apps with hundreds of thousands of users, and designing systems for over 400% year-on-year growth. An early adopter of LLM-powered development since early 2024, I've built agentic workflows spanning customer support, QA automation, and design systems. Outside of product work, I co-organise Code Green London on LinkedIn (opens in new tab), an annual conference on sustainability in tech, now in its third year.