Konstantin Gubenko

Full-Stack .NET Developer & Founder

About

I’m a software developer experienced in software architecture, design patterns, clean code and agile development. For five years I led the design, implementation, operation and further development of the software environment for the Transregio project at the University of Paderborn, building secure web apps, automation, data pipelines and real-time data capture using C#, JavaScript and Python. As a freelancer I delivered large e-commerce platforms and end-to-end solutions (ASP.NET Core, React, Vue.js), implemented REST/GraphQL/SOAP APIs, microservices, CI/CD and automated tests, and optimised relational databases (MySQL). I combine analytical, structured problem-solving with clear communication and international teamwork — fluent in English and German.

Country

Germany

City

Paderborn

Industry

Computer Software

Skill

Technology Services, Full-Stack Development, DevOps, Back-End Web Development, Architectural Design, Engineering, MongoDB, Single Page Applications, Nginx, Web Design, PostgreSQL, Blazor, Oracle Database, REST APIs, Encryption, Continuous Integration and Continuous Delivery (CI/CD), Application Programming Interfaces (API), .NET Core, React.js, PHP

Experience

Full-Stack .NET Developer & Founder

Securoia

2026-1 - Present · 9 mos

Securoia is my brainchild and passion project - a fully independent, production-ready End-to-End Encrypted (E2EE) cloud storage platform that I built entirely from scratch. Driven by a commitment to absolute data privacy, I architected a strict "Zero-Knowledge" system where the server has zero access to user files, passwords, or encryption keys. • Founded Securoia, leading the development of a secure and scalable web application. • Designed a client-side encryption protocol using Web Crypto API, enhancing data security. • Developed a high-performance SPA with Blazor WebAssembly and a RESTful API using ASP.NET Core 10. • Engineered a robust metadata management system using PostgreSQL and Entity Framework Core. • Built a secure authentication ecosystem. • Managed the full deployment lifecycle on Linux VPS, utilizing Docker for containerization and Nginx for SSL termination.

Freelance Web Developer / Software Engineer

2024-10 - 2026-1 · 1 yr 4 mos

Paderborn

In my freelance projects, including the development of extensive web shops, I realized complex applications based on object-oriented software architectures. Tasks: - Service-oriented architectures (SOA) and close coordination with users - Implementation of interfaces based on REST, GraphQL, and SOAP - Developing of microservice architectures Tech Stack: - ASP.NET Core - EF Core - PHP 8.2 - MySQL and MariaDB - Modern JavaScript frameworks (specifically React and Vue.js)

Software Developer in the project “Parametrization of attention in human-robot explanatory dialog"

Paderborn University

2021-9 - 2025-9 · 4 yrs 1 mo

Paderborn, North Rhine-Westphalia, Germany

- Developing and maintaining experiments for scientific studies using JavaScript, C#, Python, Desktop frameworks - Implementation of Auto-Deployment on Linux servers - Creation of Parsers and Utility Scripts for automation and data processing - High-Performance Computing (HPC) Operations including GPU computing with Docker and Singularity for containerized computing tasks - Documentation Management utilizing Markdown and LaTeX - Developing Web Applications with ASP.NET and .NET Core - Handling and Securing Sensitive Data - C# Simulations

Education

Paderborn University

Computer Science

2021-4 - 2025-9 · 4 yrs 6 mos

- Thesis: Computing Secure and Efficient Parameters for Lattice-Based Cryptographic Schemes - Programming & Data Structures and Algorithms - Software Engineering - Databases and Information Systems - Foundational/Advanced Concepts in Information Security - Secure Software Design - Foundations and Applications of Cryptography - System Software & Low-level Programming (ASM/C/C++) - Computer Networks - Mathematical Foundation: Analysis, Linear Algebra, Statistics - Modelling - Complexity of algorithms

Novosibirsk State Technical University (NSTU)

Mathematics and Computer Science

2018-9 - 2019-9 · 1 yr 1 mo

Deep Mathematical Knowledge: - Mathematical Analysis - Linear Algebra - Stochastics - Discrete Mathematics & Boolean Algebra _____________________________________________________ - Algorithms - Low-level Programming - Project Management