Олесь

Oles ANDRELA
Bratislava, Slovakia / Remote
[open contact info](look above in the "contact info" section)
https://github.com/DKraiser

Summary
.NET Developer with hands-on experience building backend services, REST APIs, and
data-processing systems using C# and ASP.NET Core. Strong foundation in OOP,
SOLID principles, and clean architecture, combined with practical experience deploying
and maintaining production applications. Comfortable working with databases, Git-
based workflows, and modern development practices. Interested in building reliable,
maintainable software and contributing to complex business-critical systems.

Technical Skills
Languages
C#
SQL
Python
JavaScript
C/C++

Backend Development
.NET Core
ASP.NET Core
REST API Development
MVC Architecture
API Integration
Clean Architecture

Databases
MS SQL Server
PostgreSQL
 MySQL
Redis

Data Access
Entity Framework
Basic familiarity with ADO.NET
SQL Query Optimization

Tools & DevOps
Git / GitHub
Docker
Linux
Swagger / OpenAPI
CI/CD fundamentals

Software Engineering
OOP
SOLID Principles
Design Patterns
Agile & Scrum fundamentals
Unit Testing fundamentals

Professional Experience
Backend / DevOps Developer
mttechnology.eu

Developed and maintained backend services using ASP.NET.
Designed and implemented REST APIs for data access and integration.
Built automated data collection and processing pipelines.
Implemented caching solutions using Redis to improve performance.
Deployed and maintained applications in Linux and Docker environments.
Participated in architecture decisions, infrastructure setup, and system optimization.
Worked with relational databases and structured data processing.

Backend Developer
trealway.com

Developed REST API for a customer feedback platform.
Implemented backend business logic and data management functionality.
Managed deployment and hosting infrastructure using Docker and Linux.
Configured domain, SSL/TLS certificates, and supporting services.
Maintained existing functionality and resolved production issues.

Technical Projects
AI news analysis and aggregation platform
Newtor - AI powered service for news analysis. Newtor is a fullstack microservice
application developed in ReactJs / .NET 10 stack. Currently it is in early development
stage.

Client-Server GNU/Linux Shell
Developed a client-server application with shell functionality.
Implemented socket-based communication using C and C++.
Worked with Linux system interfaces and low-level programming concepts.
Focused on performance, debugging, and system reliability.

Additional Projects
Database-driven applications with PostgreSQL schema design.
Data processing, parsing, and automation tools in C# and Python.
Machine learning projects using Python and PyTorch.
Custom UDP-based communication protocol and network traffic analysis.
Algorithmic and data structure implementations in C/C++.
Game development projects using Java (LibGDX) and C# (Unity).

Education
Slovak University of Technology in Bratislava (FIIT STU)
Bachelor's Degree in Informatics
2022 – 2025
Additional Information
Strong understanding of OOP, SOLID principles, and maintainable software design.
Experience working with Git-based development workflows.
Familiar with Agile development processes and Scrum methodology.
Basic experience with unit testing and test-driven development concepts.
Comfortable reading technical documentation and communicating in English.
Strong analytical and problem-solving skills.
Experience collaborating with cross-functional teams and adapting to existing
codebases.

Objective
Seeking a Junior .NET Developer position where I can contribute to the development of
reliable backend systems while continuing to grow my expertise in .NET Core,
ASP.NET Core, software architecture, testing practices, and scalable enterprise
applications. Particularly interested in systems that require high reliability, data
processing, integrations, and long-term maintainability.