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Hi, Its Sergej
Im a
Full stack software engineer at Mullan Lighting. I build internal systems in PHP and JavaScript: a warehouse management system, upgrades to the company CRM, and a packaging system for the sales office. Bachelor of Science (Hons) in Computing from Dundalk Institute of Technology.
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Years Experience
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Projects Completed
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Technologies Mastered
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GitHub Contributions
Education
09/2020 – 06/2024
Dundalk Institute of Technology
Bachelor of Science (Hons) in Computing (Software Development)
08/2013 – 06/2019
St. Macartan's College, Monaghan Town
Leaving Certificate
Work Experience
July 2026 – Present
Full Stack Software Engineer
Mullan Lighting
Designed and built a warehouse management system from scratch in PHP and JavaScript, replacing paper-based processes. It covers stock levels, locations, and goods in and out. Upgrading the existing CRM for customers, orders, and quotes, and building a packaging system the sales office uses to price products by how they are packed.
PHP
JavaScript
Sept 2024 – June 2026
Supply Chain Analyst
Monaghan Mushrooms
Built Python and SQL forecasts of supply against production demand, including compost. Automated reports and dashboards, and cut manual reporting time.
Python
SQL
Jan 2023 – May 2023
Software Developer Intern
Re-Gen Waste Ltd
Developed and optimized reporting features in C# and .NET. Wrote SQL queries and stored procedures, and worked in Agile sprints using Git.
C#
.NET
SQL
Projects
Label Tech
LabelTech is a web app that detects label errors in manufacturing by comparing scanned labels with database records. It minimizes human error, improves efficiency, and ensures quality assurance.
HTML
CSS
JavaScript
SQL
Computer Vision
Machine Learning
Transport4U
Mobile app that lets users buy bus tickets and use QR codes for boarding. Motion sensors show bus capacity, while drivers can track scanned tickets, update stops, and report issues.
Android
Java
SQL
QR Code
Auzins.eu (in development)
Professional fitness booking and management platform for personal trainers. Enables clients to book training sessions, manage appointments, and track their fitness journey. Features instructor dashboard for session management, client tracking, and schedule optimization.
HTML
CSS
JavaScript
MySQL
FIFA World Cup Predictions 2026
Interactive web experience for exploring and sharing predictions around the FIFA World Cup 2026—fixtures, outcomes, and fan engagement in one place.
CSS
Python
TypeScript
eCommerce Platform
Full-stack eCommerce platform with role-based access control. Features include guest checkout, user account management, order history, and comprehensive admin panel for product and user management.
React
Node.js
MySQL
Payment
Skills
HTML5
95%
Expert in semantic HTML5, creating accessible and well-structured web pages.
CSS3
90%
Proficient in modern CSS, including Flexbox, Grid, animations, and responsive design.
JavaScript
85%
Strong experience in ES6+, DOM manipulation, async programming, and modern frameworks.
React
80%
Building modern web applications with React, hooks, context API, and component architecture.
Java
85%
Proficient in Java for building scalable backend systems, OOP, and enterprise applications.
Python
80%
Experienced in Python for scripting, automation, data processing, and backend development.
SQL
75%
Strong knowledge of database design, queries, optimization, and working with MySQL/PostgreSQL.
RESTful APIs
80%
Designing and consuming RESTful APIs, understanding HTTP methods, and API best practices.
Git & GitHub
85%
Version control with Git, collaborative workflows, branching strategies, and GitHub.
Achievements
Bachelor's Degree
Bachelor of Computing in Software Development from Dundalk Institute of Technology
2024Software Development Internship
Successfully completed internship program, gaining practical industry experience
2023Full-Stack Project
Developed complete eCommerce platform with role-based access and payment integration
2023Mobile App Development
Created Transport4U app with QR code scanning and real-time capacity tracking
2023Quality Assurance Tool
Built LabelTech for manufacturing quality control and error detection
2024Open Source Contributor
Active contributor to open-source projects and maintaining personal GitHub repositories
Ongoing