Erwan Sagnardon

BTS SIO student, AI enthusiast, and product builder. I build SaaS apps and explore artificial intelligence to create tools that simplify people's lives.

Thing I've done

• CEO of Helionis Labs, startup building apps and SaaS products
• BTS SIO student in Rouen, France
• Building multiple SaaS products solo
• Long-term vision: becoming a product builder and creating useful SaaS

Thing I've build

• OpenFlux — RSS tech watch aggregator. Built with Astro, auto-updated daily via GitHub Actions.
• StagePilot — Internship search CRM for students. Organize, track and optimize applications.
• SoflyUp — Photo-free dating app. Based on passions and human connection.
• Feels — AI-powered messaging coach. Decode intentions and reply with confidence.

Tech I love

• Next.js — Fullstack React framework for the modern web
• React / React Native — UI for web and mobile
• TypeScript — Static typing for reliable code
• Tailwind CSS — Fast and consistent utility-first styling
• PostgreSQL — Reliable open-source relational database
• Convex — Reactive backend with realtime sync
• Vercel — Instant deployment and hosting
• LangChain / LangGraph — AI agent orchestration

Latest posts

• Hello World: My First Blog Post — March 11, 2026
• Building a SaaS Solo: What I Learned Shipping 3 Products — March 8, 2026
• 5 Next.js App Router Tips I Wish I Knew Earlier — March 1, 2026

My activities

Get in touch

A project, a question, or just want to chat? Feel free to reach out.