About me
Hi, I'm Lenny Muffler, a 17-year-old high school student from Stuttgart, Germany with a passion for technology and creativity. From building web applications to designing hardware prototypes, I love exploring new ways to bring ideas to life through code and design. When I'm not coding, you can find me tinkering with 3D modeling or experimenting with automation workflows. I'm always eager to learn and take on new challenges in the tech world.
17
age
Stuttgart, Germany
location
High School Student
education
Changelog from my journey
My personal timeline of growth, learning, and milestones in the world of technology, creativity, and self-discovery. A reflection of my journey, highlighting key moments, achievements, and lessons learned along the way.
2024
2024
Early projects and game engines.
- First time creating a website with WordPress
- Started learning HTML and CSS
- Built projects with Scratch
- Built projects with Unity
- Continued building with Scratch and Unity
- Learned JavaScript and TypeScript
- Started learning Git and GitHub
2025
2025
Big growth year across frontend, backend, infrastructure, and hardware.
- Learned React and Next.js
- Hosted Hetzner servers with Coolify and learned Docker
- Learned Tailwind CSS
- Replicated award-winning websites with GSAP
- Learned Three.js and React Three Fiber for these replicas
- Designed UI/UX in Figma and built interactive prototypes
- Learned Framer Motion
- Published first npm package: animated React dark mode toggle
- Built an own server with an old PC and learned Linux server management
- Hosted an n8n instance on own server
- Built mobile app with Expo and Zustand
- Built n8n app “clipshot” with Auth0, JWT, Stripe, and complex Replicate webhook workflows for cost-efficient AI video generation. This was probably the longest project I've ever worked on (Supabase, Auth0 Scopes, Stripe Webhooks for handling complex authentication and payment flows)
- Hosted PostgreSQL on own server, got hacked due to open port/weak password, and learned server/database security hardening
- Learned Angular during an internship
- Learned Blender (3D modeling, rigging, weight painting) to create assets like the homepage robot
- Learned HTTPS and domain management
- Learned Caddy and Nginx for reverse proxy and SSL management
- Learned Python for n8n custom nodes/scripts and fun projects with Pygame and CustomTkinter
- Learned reinforcement learning and built a Snake game AI with PyTorch
- Learned Arduino and microcontrollers
- Published sites on own server and Vercel with focus on performance and SEO
- Continued building with Scratch and Unity
- Learned CAD with Plasticity
- Learned PCB design with KiCad
- Built custom contact form with Resend
2026
2026
Expanding into product, content, and real-time creative workflows.
- Learning Framer for faster prototyping and design
- Doing clothing design and running a Shopify print-on-demand store
- Generating AI videos with Higgsfield, Weavy.ai, and ElevenLabs and learning DaVinci Resolve
- Building this portfolio
- Learning Unreal Engine
- Subscribing to ChatGPT Plus, Google AI Pro & Claude Pro
- Installing OpenClawd on Server and building a AI supported Trading Signal Bot
- Learning Claude Code and Codex
- Learning SwiftUI and developing iOS apps