Hero background

Crafting polished
digital experiences.

Full-stack developer blending engineering and design. Obsessed with pixel-perfect interfaces, fluid animations, and exceptional performance.

Casper LocksmithkcpruFull-stackFreelance
Design systemsLanding pagesWeb appsAnimationsContent CMS
Highlights

Achievements

Photography

Linux wallpapers

You can find my wallpapers in the official repositories of popular Linux distributions. My work has been featured in releases of Ubuntu, Xubuntu, and Ubuntu Studio, reaching millions of users worldwide.

2019 — 2026

Selected work

FrontendUI/UX Design

Leśne Klimaty

A fully bespoke website for a floral studio. Features a custom UI/UX design, interactive galleries for nature-inspired arrangements, and an intuitive workshop booking system.

LinuxNixBash

Nix Dotfiles

My highly customized, declarative NixOS dotfiles. Manages system configuration, development environments, and window manager setups with reproducible builds.

Next.jsTypeScriptSanity CMS

AR PRO Cleaning - Blog

A headless CMS-powered blog built with Sanity and Next.js. Engineered for high performance, excellent SEO, and seamless content editing experience.

Next.jsTypeScriptReact

AR PRO Cleaning - Website

A high-conversion landing page and booking platform. Integrates a complex service tier system with a streamlined user flow to drive business growth.

ReactTypeScriptTHREE.jsGSAP

Designer's portfolio

An award-winning interactive portfolio. Showcases visual storytelling through custom GSAP scroll animations and immersive THREE.js WebGL experiences.

Next.jsTypeScriptLit

Pickaxe Website

A scalable frontend architecture for an AI startup. Includes complex search interfaces, real-time data fetching, and robust Lit web components.

Next.jsTypeScriptTailwind

This Portfolio

My personal digital playground. Built with the latest Next.js features, fluid Framer Motion animations, and absolute pixel perfection.

LinuxBashHaskell

Linux Dotfiles

My personal Linux dotfiles. Background music animations, custom setup.

Unity

"Primal Instincts" Game

An atmospheric 2D platformer created under extreme time constraints during HackYeah 2023.

Godot

"Pang" Game

A feature-rich clone of the classic arcade game 'Pang'. Developed in Godot, securing 1st place in the Motorola Science Cup competition.

Unity

"Dziady - The only way to redemption" Game

A narrative-driven platformer developed for the United With Ukraine Gamejam. Blends challenging gameplay with deep, emotional storytelling.

Unity

"Przysłowiowy Platformer" Game

A physics-based puzzle platformer built for the Grarantanna Gamejam. Awarded 3rd place for its innovative mechanics and creative level design.

Companies & delivery

Collaborations

2023 — 2024Full-stack partner

AR PRO Cleaning

Built a booking-first website and content stack for growth.

  • Designed and shipped the main marketing website
  • Implemented a booking flow with clear service tiers
  • Delivered a Sanity-powered blog and content workflow
2023Frontend contractor

Pickaxe Project

Shipped search and discovery experiences for an AI startup.

  • Built responsive search and results interfaces
  • Integrated content components across marketing pages
  • Optimized UI performance and interaction polish
2022Web experience build

Wojciech Lumer Studio

Delivered a portfolio site that highlights visual storytelling.

  • Translated UI/UX mockups into production React
  • Added motion and scroll-based storytelling
  • Ensured accessibility and cross-device consistency
2021 — nowFreelance partner

Fiverr Clients

Ongoing product and landing page delivery for global clients.

  • Rapid prototyping for product launches
  • Design-to-code handoff with reusable components
  • Continuous improvements and SEO tuning