mcat.one

Mateusz Kania

FrontendEngineer

I make large media sites load fast. Right now that means BBC Good Food and Radio Times at Immediate.

  • Ten years
  • Fintech and media
  • Poland, remote

Open to opportunities

Connect on LinkedIn

Ten years in, the work has settled into one thing: performance at scale. Core Web Vitals, migrations, and design systems that hold up across a publisher's whole brand portfolio.

At night I build agents. AI_devs 3 Agents in 2024, 10xDevs in 2025, AI_devs 4 Builders this April. That track changed how I work more than any framework has.

Experience

2024 now

Frontend React Developer

Immediate, via emagine

Remote

  • Performance work on BBC Good Food and Radio Times, two of the UK's highest traffic content sites.
  • Shipping new features on a shared Next.js platform, in a team of three frontend, two backend and one QA engineer.
  • Part of the Auth0 rollout. Automated tests in Jest and Cypress, CI/CD pipelines on AWS.

2021 2024

Frontend Developer

SiteBox, formerly Statik Space

Remote, UK

  • Built a SaaS for managing WordPress instances in Next.js and TypeScript.
  • Web animation with GSAP and Framer Motion across client sites.
  • Custom Gutenberg blocks in React, plus Node.js and GraphQL services on MongoDB.

2020 2021

Front End Developer

Gravity Global

Nowy Sącz, PL

  • Carried the Nurture team's work forward after the acquisition, building components and sites for financial sector clients.

2016 2020

Lead of Frontend Development

Nurture

Nowy Sącz, PL

  • Led eleven developers from 2018, after joining as a frontend developer in 2016.
  • Ran hiring and onboarding, and designed growth paths for junior developers.
  • Set styling and scripting standards, ran code reviews, wrote the technical documentation, and built React blocks for the in-house Pagebox page builder.

2016

Graphic Designer

Vantis Holding

Nowy Sącz, PL

  • Designed landing page UI, advertising material and video for social platforms.

Stack

Languages

  • TypeScript
  • JavaScript (ES6+)

Frameworks

  • React
  • Next.js
  • Gatsby
  • Redux
  • MobX

Styling and motion

  • GSAP
  • Styled Components
  • Tailwind CSS
  • Material UI
  • Ant Design
  • Web Components

Testing

  • Jest
  • Cypress
  • Puppeteer

Backend and data

  • Node.js
  • GraphQL
  • REST
  • MongoDB
  • MySQL
  • MariaDB

AI

  • OpenAI API
  • Langfuse
  • Promptfoo
  • Pinecone
  • Neo4j

Platform

  • AWS
  • Docker
  • CI/CD
  • Git
  • Webpack
  • Figma
  • Jira

Let us talk

Hiring, contracting, or just want to compare notes on making big sites fast.

Connect on LinkedIn

LinkedIn is the fastest way to reach me.