# Mateusz User

Mateusz User is a remote worker on Himalayas, Software Engineer at XTM International, based in Poland.

Source: https://himalayas.app/@mateuszuser4

```text
Frontend Developer at XTM International who developed a real-time text editor for linguists in a translation management system.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Poland |
| Authorized to work in | Poland |
| Salary expectations | 160k+ PLN |
| Job categories | Front End Developer, Full Stack Developer |
| Skills | React, TypeScript, JavaScript, Frontend Architecture, WebSockets, Component Libraries, Redux, Redux toolkit, Redux Saga, Immer, React Hooks, Context API, HTML5, CSS, SCSS |
| LinkedIn | https://linkedin.com/in/mateusz-klimorowski-frontend-developer |
| GitHub | https://github.com/matt65dos |

## What I'm looking for

```text
I’m open to frontend and frontend-focused full-stack roles. I’m currently expanding my full-stack development experience through personal projects.
```

## About

```text
At XTMInternational, I developed core modules for a Translation Management System, including a complex real-time text editor that serves as the primary workspace for linguists. I also co-developed a React component library used across the system’s applications.

I contributed to migrating legacy JavaScript and AngularJS applications to React, implemented accessibility improvements, and wrote and maintained tests. Through personal projects such as DentWise, Luma Studio, and Northwind, I’m expanding into frontend-focused full-stack development.
```

## Experience

### Software Engineer

XTM International. Aug 2024 - Jul 2026

```text
Developed core modules of a large-scale Translation Management System, including a complex real-time text editor. Co-developed a React component library, implemented WCAG accessibility improvements, and wrote unit and integration tests.
```

Skills: React, TypeScript, Redux, Redux-Saga, Immer, WebSockets, Vitest, React-Testing-Library, Jest, Vite, Jenkins, WCAG, Performance-Optimization, Code-Review, Scrum

### Frontend Developer

XTM International. Jan 2017 - Jul 2024

```text
Developed TMS application modules in JavaScript/jQuery and AngularJS, later in React and TypeScript. Contributed to migration of legacy applications to React, wrote tests, and maintained Jenkins pipelines.
```

Skills: React, TypeScript, JavaScript, Redux, Redux-Saga, Jest, React-Testing-Library, Webpack, Jenkins, jQuery, AngularJS, HTML, CSS, Code-Review, Scrum

### Junior Frontend Developer

VoidEntity. May 2016 - Dec 2016

```text
Designed, developed and deployed websites and web applications on the WordPress CMS, delivering client-specific solutions.
```

Skills: WordPress, HTML, CSS, JavaScript

## Education

### Claude Academy

Claude 101, Artificial Intelligence. 2026 - 2026

```text
Completed Claude 101 certification in 2026.
```

### KnowBe4

Cybersecurity, GDPR/PII, Secure AI Usage & Corporate Ethics, Cybersecurity. 2022 - 2026

```text
Completed cybersecurity, GDPR/PII, secure AI usage, and corporate ethics training from 2022 to 2026.
```

### Scrum Fundamentals Certified

Scrum Fundamentals Certified, Project Management. 2023 - 2023

```text
Earned Scrum Fundamentals certification in 2023.
```

### Poznań University of Physical Education

Master of Physiotherapy, Physiotherapy

```text
Master of Physiotherapy degree from Poznań University of Physical Education.
```

## Tech stack

- Jenkins
- PostgreSQL
- Sentry
- Node.js
- Next.js
- Figma
- Jest
- React
- jQuery
- AngularJS
- Webpack
- JavaScript
- HTML5
- WordPress
- Strapi
- Redux
- redux-saga
- TypeScript
- React Testing Library
- Git
- SQL
- Drizzle ORM
- TanStack Query
- Cursor
- Clerk
- Vite
- Vitest
- Polar
- Immer
- Claude Code
- Redux Toolkit
- Express
- REST APIs

To contact Mateusz, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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