Kopersky.pl – Fulstack developer

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Maciej Koperski

Programmer Developer

Olsztyn, Poland

maciej.koperski@o2.pl

570 113 995

Maciej KOPERSKI

FULLSTACK DEVELOPER

Enthusiastic developer passionate about engaging projects and seeking a great place for further growth.

Video CV

About me

Self-taught Fullstack Developer who thrives on turning complex challenges into practical, real-world applications. Experienced in building, configuring, and administering e-commerce solutions from the ground up.

Eager to contribute my skills in creative problem-solving to a team dedicated to building impactful digital products and fostering a culture of continuous improvement.

Outside of coding, my curiosity extends to 3D modeling and leveraging Raspberry Pi for hardware automation. You’ll also find me hiking, cycling, or strategizing over board games.

Video resume

Education profile

M.Eng. in Mechanical Engineering
University of Warmia and Mazury in Olsztyn, Poland 2011 - 2013 Specialization: Computer-Aided Engineering in Mechanical Design and Manufacturing
B.Eng. in Technical and IT Education
University of Warmia and Mazury in Olsztyn, Poland 2007 - 2011
Telecommunications Technical Secondary School
Technikum No. 9 in Olsztyn, Poland 2003 - 2007 Diploma: Technician’s Certificate in Telecommunications

Work experience

Fullstack developer
Freelancer 2021 - present Node.js (React.js), PHP and Python applications API integration and data exchange Web development and e-commerce solutions Workflow automation using Excel VBA and Google Apps Script Design and prototyping in Photoshop and Figma
Administrator systemów alarmowych
22 Wojskowy Oddział Gospodarczy 2013 - present Authorized Access to Classified Information – Confidential Level (until 2033) Administration of Security Systems: Alarms, Access Control, and CCTV Creating Reports and Querying Databases Drafting and Reviewing Investment Proposals Training Delivery and Monitoring Contract Performance Systems & Tools: ARITECH | TITAN | GALAXY | FRONTSHELL IB SYSTEM | IFTER EQU | MS OFFICE + VBA
Web developer
Pigmejka.pl 2014 - 2019 Developed an online store on WordPress with WooCommerce Migrated the e-commerce store to IdoSell (IAI-Shop) platform Configured the store and integrated it with external systems, including BASELINKER and SALESMANAGO Created an API-based application for integration with EMPIK, EMAG, MORELE, and CARREFOUR, managing product listings and synchronizing stock and pricing Built an application for generating unique product descriptions from XML files provided by various suppliers, implementing a custom ETL process Prepared graphics, marketing campaigns, and sales reports for the store Conducted product photography and produced advertising animations using DaVinci Resolve and Blender

Technical skills

Working with data:

Data processing and database import using API and file formats such as JSON, CSV, XML
Design and implementation of ETL processes, including generation of CSV and XML files using XPath and XSLT
Automation and bulk product uploads to e-commerce platforms
Data manipulation in Excel (VBA) and Google Sheets (Apps Script)

PHP SQL Excel + VBA Apps script ETL XML CSV JSON API

E-commerce:

Development, configuration, and maintenance of online stores based on WooCommerce and IdoSell (IAI-SHOP)
Integration with external systems and third-party services
Data updates via API using PHP + SQL and scheduled CRON jobs
Creation of graphics, promotional videos, and product photography

WordPress Woocommerce IdoSell (IAI-Shop) Baselinker HTML CSS Photoshop Figma

Node.js / React.js:

Backend development with Node.js and Express.js, including database management with MongoDB
Frontend development using React.js and Redux
Data processing and integration through APIs
Implementation of external libraries and third-party integrations

Node.js React.js MongoDB JSON API Photoshop Figma

Other technologies

API testing using Postman
Basic usage of GIT and GitHub for version control
Simple configuration of Docker and Docker-Compose
3D modeling and animations in Blender and DaVinci Resolve
Basic programming for Raspberry Pi
Familiarity with engineering software: AutoCAD, Inventor, SolidWorks

Postman GIT/ GITHUB Docker Blender DaVinci Resolve Raspberry Pie AutoCAD Inventor SolidWorks

Software applications

HTML, CSS, PHP, JS, MYSQL

Inventory management system development for tracking product stock levels

WordPress as a headless CMS for content and data management
Creation of categories and products, including real-time stock updates
Generation of statistics by category and date
Export of data to XML/CSV formats compliant with ERP system requirements

NODE.js, REACT.js, MYSQL, JSON

Backend development in Node.js and frontend implementation in React.js
Random word selection from a JSON file with storage in a MySQL database
Game logic implementation with team division into two groups (guessers and clue-givers)