Leonard Lesinski
Full Stack Developer
North Rhine-Westphalia, Germany
Hi, I’m Leo! :)
I build fast, reliable web apps from frontend to backend – and I’m not afraid to go low-level when needed. Whether you're looking for a fullstack developer or someone to dig into technical depths, I’m here to help.
Technologies & SkillsMy go-to for fullstack web apps. I've built dynamic forums, member portals, and APIs with it.
since 2024
I love Svelte’s reactivity model – great for building responsive, fast UIs without boilerplate.
since 2024
Used it for building native-feeling desktop apps with a web UI and a Rust backend.
Used in
since 2025
I use Rust to build fast and safe applications – from command-line tools to backend APIs. It's great for projects where reliability and performance matter.
Used in
since 2024
I use TypeScript across all frontend projects for better DX, safety, and scalability.
since 2022
Learned Java during my early CS studies – mostly used it for OOP-heavy school projects.
since 2022
The base of my web dev journey – still useful for quick scripting and browser APIs.
since 2021
Maintained and modernized legacy PHP projects. Also used it for simple backend scripts.
since 2021
My go-to for quick prototypes, small scripts and automation tasks. Also used in early projects.
since 2020
I use it to deploy apps, serve content at the edge, and integrate services like Turnstile or D1.
since 2024
Configured NGINX as a reverse proxy and static asset server in several self-hosted setups.
since 2022
Used it for years on shared hosting and configured `.htaccess`, virtual hosts, and mod_php.
since 2021
Runs most of my frontend tooling and fullstack apps. Used with SvelteKit and various CLIs.
since 2021
My daily OS. I value its flexibility, rolling release model, and excellent community documentation.
since 2024
Ran Debian on servers and headless systems. Rock-solid and minimal, ideal for production.
since 2023
Used it as a beginner-friendly Linux distro before switching to Debian. Great for quick setups.
since 2023
Still boot into Windows occasionally for games or testing – not part of my dev setup ;)
since 2016
Developed web apps with mobile-first in mind and debugged via Android devices regularly.
since 2014
Used in early projects before switching to utility-first CSS. Still helpful for custom themes.
since 2022
My preferred styling approach for web apps. It’s fast, flexible, and scales well in teams.
since 2024
Styled every project manually before moving to SCSS/Tailwind. Still use vanilla CSS for edge cases.
since 2021