I'm Javier Ruiz Salvador — Product Manager & AI Builder
Staff PM with 15+ years building B2B, B2C, and B2B2C products at scale.
Currently building Zarkus — an AI-powered endurance training app — as solo founder: full-stack product (iOS · Android · web · Python backend · AI coach with agents + evals · Garmin integration), shipped solo using Claude Code, Supabase, Vercel, Claudfare, Resend, Telegram, Posthog and Langchain.
I use AI tooling daily — not to generate boilerplate, but to ship products I couldn't build alone. That's given me hands-on knowledge of agent architecture, evals, prompt engineering, and context management.
What I've shipped:
Also, you can find me on Linkedin: https://www.linkedin.com/in/javier-ruiz-salvador-pm/