Cosmo Braun030
WEB ENGINEER
BERLIN (030)

Web engineer
with a
designer’s eye.

I design and build software for the web, from fast interfaces to interactive systems.

View selected work
info@cosmo030.com
(A) FOCUS
Frontend and backend, TypeScript, Python
(B) ALSO
Databases, APIs, Shopify, WordPress
(C) BASED
Berlin, 030
(D) OPEN TO
Freelance, full-time
01 WORK

Selected work

Own products and client builds: what I made, how it’s built, and the part that was hard.

  • 01

    Website for a Berlin fashion label
    • Shopify
    • Liquid
    • JS
    sample030.com1440 × 900
    Full-page screenshot of the sample030 website
    FIG. 02SAMPLE030

    sample030 is a fashion label based in Berlin, founded by designer Ruben Jai, who grew up surrounded by the city's creative energy.

    • Shopify
    • Liquid
    • JS
    Visit site

  • 02

    Restaurant site, custom built and hosted on Cloudflare
    • TypeScript
    • Sanity
    • Cloudflare
    qui31.de1440 × 900
    FIG. 03QUI 31

    Blending international flavors with Italian tradition, Qui31 elevates dining to an art form.

    WHAT I DID
    Built the whole site from scratch, hosted it on Cloudflare, and wrote the TypeScript backend on Sanity Studio.
    • TypeScript
    • Sanity
    • Cloudflare
    Visit site

  • 03

    Online store for a run-flat tire-safety manufacturer
    • Shopify
    • Liquid
    • JS
    tyron-sicherheit.de1440 × 900
    FIG. 04TYRON

    Tyron is constantly developing run-flat technologies to enhance tire safety for both civilian and military applications.

    • Shopify
    • Liquid
    • JS
    Visit site

  • 04

    Online shop for refillable gas bottles for motorhomes
    • Shopify
    • Liquid
    • CSS
    • JS
    gaslowdirekt.de1440 × 900
    FIG. 05GASLOWDIREKT

    Gaslowdirekt sells refillable LPG gas bottles, filling kits and accessories to motorhome and caravan owners, as an alternative to disposable exchange bottles.

    WHAT I DID
    Mostly custom sections and UI design, built with Liquid, CSS and JS.
    • Shopify
    • Liquid
    • CSS
    • JS
    Visit site

  • 05

    Discord bot for running CTF challenges inside a server
    • Python
    • Shell
    CTFLab logo
    FIG. 06CTFLAB

    An all-in-one Discord bot for running Capture The Flag challenges directly inside a server.

    • Python
    • Shell
    Invite botSource
Smaller projects and experiments are on GitHub.
github.com/cosmo030
02 STACK

Stack

What I reach for, frontend to deployment.

Frontend

  • HTML & CSS
  • JavaScript, TypeScript
  • React
  • Next.js
  • Responsive UI & motion

Backend & tooling

  • Node.js
  • Python
  • Shell
  • SQL, MySQL, MongoDB
  • REST APIs, JSON, webhooks
  • Git

Platforms

  • Vercel
  • Cloudflare
  • Sanity
  • Shopify (Liquid)
  • WordPress
  • Webflow
  • Discord bots
03 ABOUT

About

I’m a web engineer based in Berlin. I build interfaces that load fast and stay out of the way, and the systems behind them. That ranges from client sites for a fashion label, a restaurant, a tire-safety manufacturer and a gas-equipment shop to CTFLab, a Discord bot I run for CTF challenges. I care about the details: type, spacing, and code that’s easy to change later. Right now I’m learning about system design and LLMs.

BASED
Berlin, 030
TIMEZONE
Europe/Berlin
LEARNING
System design, LLMs
OPEN TO
Freelance, collaborations, full-time
04 CONTACT

Let’s connect

info@cosmo030.com

Available for freelance projects, collaborations and full-time roles.

Send an email
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