About Skills Services Projects Contact
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.

View my work Get in touch
Location Joensuu, Finland
Education Web Development, Riveria · Social Media Management & Marketing, Udemy
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
01 - Who am I

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.

In June 2026, I completed a six-month web development programme at Riveria, where I worked 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.

02 - My toolkit

Skills &
tools.

What I have used in previous projects.

Languages

  • HTML
  • CSS
  • JavaScript

Frameworks

  • React
  • Next.js
  • React Native
  • Vite
  • Prisma

Platforms & tools

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

Also

  • Canva / GIMP
  • Basic photo editing
  • AI-assisted dev
03 - What I can do for you
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.

04 - Things I've built
001
Web App · Full-Stack · PWA

Speakeasy

A speaking-practice PWA. Spin the wheel, get an unexpected topic, prepare, speak out loud for a timed session, and rate how it felt. Built to make daily speaking practice simple.

Next.jsTypeScriptTailwindPrismaPostgreSQLPWA
Live app ↗ GitHub
002
Website

ViaDia Joensuu

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

WordPressElementor
Live site ↗
003
Website · Course project

Karelia Ulkorakennus

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

HTMLCSSJavaScriptPHPMySQLAI chatbot
GitHub
004
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 Next.js and Supabase.

Next.jsTypeScriptSupabaseTailwindVercel
Live app ↗ GitHub
005
Website · Course project

Pielisen Pyörähuolto

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

HTMLCSSJavaScriptPHPMySQLAI chatbot
GitHub
006
Website · Travel

Jordania.fi

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

HTMLCSSJavaScript
Live site ↗ GitHub
007
Mobile App · Game

Christmas App

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

React NativeExpoReact Navigation
GitHub ↗
008
Website · Course project

Koivu & Kupari

A website for a carpentry business, with a clean, professional design built to reflect the brand's identity and craft.

HTMLCSSJavaScript
Live site ↗ GitHub
009
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
Live site ↗ GitHub
010
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
Live app ↗ GitHub
011
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
Live site ↗ GitHub
05 - Contact me

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
katerina.maenpaa@outlook.com
github.com/katerikoti
Joensuu, Finland
Available for freelance