I'm Yassir, a vibe coding coach for founders, PMs and designers. You built an app with Claude Code, Cursor or Lovable and it mostly works. I coach you 1-on-1 to make it secure, tested and ready for real users.
"Build a secure checkout that scales..."
Hardening the ecosystem
Claude Code, Cursor and Lovable get you from idea to working app in days. What they don't do is tell you where the security holes are, or why changing one thing breaks three others. That's what 1-on-1 Claude Code coaching is for: you fix it yourself, with someone who has shipped production apps guiding you.
AI writes code quickly, but you're not sure if it's opening doors for hackers or leaking data.
You've built features, but the underlying structure feels like a house of cards ready to collapse.
You want to launch, but don't know if your app can actually handle 100 or 10,000 real users.
You're learning fast, but hitting invisible walls that Claude Code can't seem to explain.
AI tools get you 80% there. I show you the final 20%.
Fast, readable, but dangerously insecure.
Through my company, WebMastry, I've managed and delivered production apps since 2021. Here are two of them. They're where I learned what breaks once real users show up, and it's what I coach you to check in your own app.
Both figures: the AI Co-Teacher Platform, a WebMastry project.
Built an AI assistant that helps teachers automate daily tasks, from lesson planning to student feedback, serving 15,000+ educational organizations.
Carbon footprint tracking system for investment decisions, managing environmental data for 100,000+ companies worldwide.

I'm Yassir, and yassir.codes is my 1-on-1 coaching for vibe coders: founders, product managers and designers who build apps with AI coding tools like Claude Code, Cursor and Lovable. I help you take a prototype that mostly works and make it ready for real users: secure, tested and deployed properly. I've been writing software since 2018, and in 2021 I founded WebMastry, a development agency that has delivered production software for clients in the US, Australia, New Zealand and Germany, on projects from $5k to $100k+. Coaching is not done-for-you. We meet for 90 minutes on Google Meet or Zoom, you share your screen and work on your own codebase, and I guide. Before every paid session I spend 45 to 60 minutes reviewing your code, and within 24 hours you get a written recap. Your first session is $50.
Background
~8 years building products and leading development teams.
How I coach
You type, I guide. If I type, you learn nothing.
Start with a free call, test the fit for $50, or take the full path from prototype to production.
$50$100
90 minutes on your real project, with a codebase review before we meet. Want to keep going? Get the pack within 7 days after and $50 comes off.
Book your first session$600· 6 × 90 min
Six sessions, one step at a time: audit, security, data, testing, deploy, handover. WhatsApp support in between. You leave with an app that holds up and the know-how to keep it that way.
See the pack15 minutes. Tell me what you built and where it's stuck, and I'll tell you honestly whether coaching is the right move.
Book the free callNo coaching reviews here yet, because the coaching offer is new. These are from founders who hired my agency, WebMastry, to build their software.
"Yassir did an excellent job. Working with him allowed me to save several hours of my own development time. He took initiative and kept working on the problem until he figured it out. Very little management was needed. I hope to work with him again in the future."
"WebMastry has done an outstanding job with our SaaS analytics platform. They built it exactly as per our specifications, took initiative to suggest new design features, and went above and beyond to make sure we are happy with the results. They make an excellent external dev team."
"Working with WebMastry was an absolute pleasure. Total professional, Yassir is very knowledgeable and wonderful to work with. Looking forward to working with them again soon."
Tactical advice on vibe coding, architecture, and security.