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Web Developer & Creative Explorer

Katerina
Mäenpää

Building things that are both functional and beautiful. Based in Joensuu, Finland, open to freelance projects and collaborations worldwide.

Location Joensuu, Finland
Currently Web dev programme, Riveria (graduating June 2026)
Approach Hands-on · AI-assisted
Status Available for hire
Languages Czech · English · Finnish · Swedish (strong understanding) · Arabic (basics)
Web Developer Available for freelance Open for collaborations Based in Finland Web Developer Available for freelance Open for collaborations Based in Finland Web Developer Available for freelance Open for collaborations Based in Finland Web Developer Available for freelance Open for collaborations Based in Finland

Who
am I.

Portrait of Katerina Mäenpää in a pink dress, waist-up Let's work together

I'm Katerina, a Czech-born web developer based in Joensuu, Finland. I build websites and web apps using modern tools.

I'm currently doing a six-month web development programme at Riveria, where I work with HTML, CSS, JavaScript, WordPress and AI. I'm also a part of a startup, collaborating internationally on a mobile app and working on some personal projects on the side.

My path into tech wasn't the straightforward kind. A couple of years ago I started saying yes to new things, trying what I'd never done before, and slowly shifting from "I can't do this" to actually doing it.

What I love most about this work is when something finally clicks and what was just an idea becomes something real. I'm open to freelance projects and always happy to talk to someone with an idea they want to bring to life.

Skills &
tools.

What I have used in previous projects.

Languages

  • HTML
  • CSS
  • JavaScript

Frameworks

  • React
  • Next.js
  • React Native
  • Vite

Platforms & tools

  • WordPress
  • Supabase
  • Vercel
  • GitHub
  • VS Code / Cursor
  • Emergent

Also

  • Canva / GIMP
  • Basic photo editing
  • AI-assisted dev
01

Website Development

Clean, responsive websites built with HTML, CSS and JavaScript. From simple landing pages to multi-section business sites.

02

Web App Development

Interactive web applications built with React and Next.js. I love turning ideas into tools that solve real problems.

03

Social media management

Helping small businesses show up online - content, graphics and day-to-day social media management.

001
Web App · Full-Stack

Let It Go

Write what you can't say out loud, hit send, and let it go. A full-stack app with encrypted messages built with React and Supabase.

Next.jsTypeScriptSupabaseTailwindVercel
002
Web App · Frontend

Crochet App

A web app for crochet enthusiasts, combining a personal passion with modern front-end development using React and Vite.

ReactViteVercel
003
Website · Concept

Karelia Ulkorakennus

Concept site for an outdoor construction company. Includes an AI chatbot and a booking system with a PHP/MySQL backend and admin panel.

HTMLCSSJavaScriptPHPMySQLAI chatbot
004
Mobile App

Christmas App

A festive mobile app with four mini-games built in React Native, my first step into mobile development.

React NativeExpoReact Navigation
005
Website · Concept

Koivu & Kupari

Concept site for a carpentry business. Clean, professional design built to reflect the brand's identity and craft.

HTMLCSSJavaScript
006
Website · Concept

Pielisen Pyörähuolto

Concept site for a bicycle repair shop. Includes an AI chatbot and a booking system with a PHP/MySQL backend and admin panel.

HTMLCSSJavaScriptPHPMySQLAI chatbot
008
Website · Art

Hilltop Babies

Website for my reborn doll art, a delicate and warm design for a niche and passionate audience, built around real work.

HTMLCSSJavaScript
009
Website · WordPress

ViaDia Joensuu

WordPress website for a Joensuu-based non-profit supporting people through community meeting places, food aid and social activities.

WordPress
010
Website · Game

Puzzle Plane

A game site I built for my kids, an airplane with clickable windows leading to mini-games. My very first coding project.

HTMLCSSJavaScript
011
Website

Jordania.fi

A Finnish-language travel guide to Jordan, covering destinations, travel tips, and links to a local tour provider's packages.

HTMLCSSJavaScript

Let's build
something
together.

Whether you have a project in mind, a startup idea, or just want to say hello, I'd love to hear from you.

Send a message
Joensuu, Finland
Available for freelance