Oleksandr

OLEKSANDR KOSOVAN
.NET Software Engineer
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https://www.upwork.com/freelancers/~01e07482507f54d429?
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SUMMARY EXPERIENCE
Versatile .NET Software Engineer .NET Software Engineer 10/2025 - 12/2025
with more than 4 years of
commercial experience building and Buhl IT
supporting applications using
UpWork Freelancer
ASP.NET Core, Blazor, and desktop
UI technologies. Experienced in • Delivered a microservices-based application for a Danish festival, including a
designing clean services, Blazor WebAssembly frontend hosted on Azure Static Web Apps.
implementing secure authentication • Built and maintained backend microservices on .NET 9, exposed via RESTful Web
flows, integrating third-party APIs and deployed to Azure Container Apps.
services, and working with SQL and • Implemented integration using Azure Service Bus Topics, triggering Azure
NoSQL data stores. Proven ability to Functions for event-driven workflows.
work in both greenfield and legacy • Developed a data synchronization pipeline that updates user records in an Azure
codebases, prioritize delivery, and AD B2C tenant via Microsoft Graph, executed from Azure Functions.
improve maintainability through • Designed the data layer with Entity Framework Core, using Azure SQL Database
automation, monitoring, and and Azure Cosmos DB per service.
documentation. • Implemented authentication and role-based authorization using Azure AD B2C
and JWT Bearer

SKILLS .NET Software Engineer – Crypto Trading / 06/2025 - 11/2025
Analytics
Core Quanter
C#, .NET, .NET Framework, ASP.NET • Developed applications for automated cryptocurrency trading based on custom
(Web API, MVC), Blazor strategies.
(WebAssembly / Server), WinForms, • Implemented an application for collecting analytical data on cryptocurrency
WPF markets.
• Integrated TARDIS.DEV API.
Frameworks & Libraries • Implemented a module for cryptocurrency exchanges ( trading ) integrations
using the JKORF library.
Entity Framework, Serilog, JKorf,
• Implemented authentication for a Blazor web application with Google OAuth and
Open AI, ADO.NET, Microsoft Graph,
Two-Factor Authentication (2FA).
AutoMapper, Swagger, Telegram.Bot
• Integrated PostgreSQL and ClickHouse databases to store, process, and analyze
large volumes of analytical data.
Databases • Implemented data export to Google Sheets.
SQL Server, PostgreSQL, • Developed a Telegram-based notification system to monitor and alert on system
ClickHouse, Azure Cosmos DB health and operational statuses in real time.
• Integrated Grafana for visualization of analytical data.
Cloud • Configured and maintained deployment of .NET applications along with
PostgreSQL, ClickHouse databases, and Grafana, running on Linux
Azure Static Web Apps, Azure Ubuntu/Debian servers.
Container Apps, Azure Functions, • Authored and maintained documentation using DocFX and Markdown.
Azure Service Bus

DevOps & Tooling
Full Stack Net Developer 11/2024 - 06/2025

Git, Copilot, Azure Pipelines, My English School
PowerShell, Inno Setup, Postman, • Maintained a website built on ASP.NET Web Pages with Telerik AJAX
Fiddler, DBeaver, SQL Server components.
Management Studio • Developed and integrated Telerik Reports.
• Contributed to the integration of DBS Bank services.
Web • Migrated applications from ASP.NET Web Pages to Blazor Server.
• Supported and optimized database interactions through ADO.NET.
HTML, CSS, JavaScript

GOALS
Improving English to native.
Progressing to Software Architect
role.
LANGUAGES EXPERIENCE
English Full Stack Net Developer 09/2024 - 10/2024
Pre-Intermediate ( B1 )
Pace Industries
UpWork Freelancer
• Development of web application (Blazor) with rich UI for data viewing, filtering,
and search across portals, with user authentication and authorization.
• Integrated Azure OpenAI to handle natural language queries by converting them
to T-SQL, with graphical display of results.
• Implemented user approval management, password reset functionality, and email
notifications for administrative actions.
• Connected all portals to an Azure SQL Database for centralized data storage and
management. (EF Core)
https://www.upwork.com/freelancers/~01e07482507f54d429?
p=1837936556090920960

.NET Developer ( FF Group ) 09/2023 - 09/2024
Polytech Software Kyiv, Ukraine
• XProtect Milestone MIP plugin development ( WinForms and WPF ).
• Exchange events via web sockets and build WPF UI at runtime based on received
event data.
• Writing a PowerShell that runs a program installer (InnoSetup) in silent mode with
various parameters and then runs unit tests for the installed product and
generates an "Allure" report for each installer run.
• Integration of the "Allure Report" framework for generating reports based on unit
testing results.
• Support for the existing InnoSetup installer.
• Support of Azure Pipelines.

.NET Full-stack Developer ( DocFactory ) 08/2022 - 09/2023
Polytech Software Kyiv, Ukraine
• Maintaining legacy code in a project that is developing a portal to create/edit
documentation with Oxygen XML Editor ( DITA ).
• Worked with conversion of XML ( DITA ) documents to PDF using XSLT. Also to
HTML using XHTML.
• Integration of "ASPOSE. HTML" framework. ( HTML to graphic image conversion ).
• REST data exchange.
• Support for primitive front-end ( html, js ).

.NET Junior Developer ( MSS / Inuvi ) 04/2022 - 08/2022
Polytech Software Kyiv, Ukraine
• Developed, supported, and tested ASP.NET MVC applications

.NET Junior Developer ( Sabis ) 07/2021 - 12/2021
Polytech Software Kyiv, Ukraine
• Developed, supported, and tested ASP.NET Core Web APIs and related services.
• Identified and fixed defects related to Entity Framework.

.NET Junior Developer 09/2020 - 06/2021

APEPS department of Igor Sikorsky Kyiv Kyiv, Ukraine
Polytechnic Institute
• Development of WinForms application on .NET Framework.
• Receiving data via http requests/parsing excel sheets.
• Displaying data in WinForms app and load data into remote PostgreSQL
database.

EDUCATION
Master's degree, Computer Science 09/2024 - 01/2026
National Pedagogical Dragomanov University
EDUCATION
Bachelor's degree, Software Development 09/2021 - 07/2024

National Pedagogical Dragomanov University

Junior Developer, Software Development 09/2017 - 12/2021
Kyiv Professional College of Computer Technologies and
Economics