Full-Stack Developer · Ruda Śląska, Poland

Szymon Sieczko

Angular React Node.js TypeScript Ionic

Get in touch View experience →

Years exp.

Major projects

10k+

Users served

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01 — About

Who I am

I'm a Frontend-focused Full-Stack Developer with nearly 5 years of professional experience building modern web and mobile applications that real people use every day.

My core stack is Angular, React and Node.js with TypeScript throughout. I care deeply about clean architecture, maintainable code and delivering features that actually move the needle for users and businesses.

Beyond my day job I'm building Szymon Sieczko IT — helping local businesses get online with professional websites tailored to their brand and audience.

Location Ruda Śląska, Poland

Company Euvic S.A.

Role Full-Stack Developer

Experience ~5 years

Education B.Eng. Computer Science

Status ● Open to projects

02 — Skills

Tech stack

Languages

TypeScript JavaScript HTML CSS / SCSS

Frontend

Angular React.js Ionic Redux Angular Material React Router

Backend & Data

Node.js Express REST APIs Elasticsearch Puppeteer

Tools & Version Control

Git GitHub GitLab Bitbucket

Mobile

Ionic Flutter (contrib.)

Currently building

Next.js Tailwind CSS Sanity CMS Vercel

03 — Experience

Where I've worked

Euvic S.A.

Aug 2021 – Present

● Current

Full-Stack Developer

Frontend-focused · Poland

BringLiesel — Angular & Node.js (2023–Present)

Designed and implemented frontend architecture from scratch using Angular and TypeScript
Refactored backend services from JavaScript to TypeScript in Node.js
Built secure login, password reset, shopping cart and checkout flows
Developed admin features including department and resident management
Generated dynamic PDFs using Puppeteer for reporting
Delivering a platform serving 2,000 customers and tens of thousands of users

Angular TypeScript Node.js Puppeteer Flutter

HHT — Ionic (2023)

Developed mobile application for warehouse operations using Ionic and TypeScript
Implemented inventory tracking, scanning and real-time stock monitoring

Ionic TypeScript

Vivium — React (2021–2023)

Built scalable UI using React, TypeScript, Redux and Material UI
Worked on healthcare SaaS systems supporting workforce and administrative operations
Implemented real-time chat and notifications

React TypeScript Redux Material UI

04 — Projects

Selected work

E-Commerce Platform

Client Access

BringLiesel

2023 – Present

Designed and built the Angular frontend from scratch alongside a Node.js backend migration to TypeScript. The platform served 2,000 customers before being discontinued.

Angular TypeScript Node.js Puppeteer Flutter

Mobile Application

Discontinued

HHT

2023

Cross-platform warehouse management app built with Ionic. Covered inventory tracking, barcode scanning and real-time stock monitoring.

Ionic TypeScript

Healthcare SaaS

Discontinued

Vivium

2021 – 2023

Scalable healthcare platform built with React and Redux. Supported workforce management, admin operations and real-time chat for medical teams.

React TypeScript Redux Material UI

04 — Services

What I offer

Web Development

Full-stack web applications built with Angular, React or Next.js. Clean architecture, TypeScript throughout, scalable from day one.

Business Websites

Professional landing pages for local businesses — restaurants, salons, gyms and more. Fast, SEO-ready and easy to update. Fixed monthly fee, no surprises.

Mobile Apps

Cross-platform mobile applications using Ionic and TypeScript. One codebase, iOS and Android covered.

API & Backend

REST API design and development with Node.js and Express. Third-party integrations, authentication flows and database design.

06 — Contact

Let's build something great.

Whether you need a full-stack developer for your team or a professional website for your business — I'd love to hear from you.

Email sieczkoszymon@gmail.com → Phone +48 882 518 260 → Location Ruda Śląska, Poland →

Current status

Available for projects