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Oleh Skalievoi
m Founder at Sjonar | .NET Developer
Odesa, Odessa, Ukraine
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(LinkedIn)
sjonar.org/ (Company) Summary
Full-Stack .NET development (ASP .NET Core, React, AWS, Azure
Top Skills
DevOps).
C#
.NET
React.js
Experience
Languages Sjonar
English (Professional Working) Founder | .NET Developer
Ukrainian (Native or Bilingual) March 2025 - Present (1 year 2 months)
Russian (Native or Bilingual) Odesa, Odessa, Ukraine

Sjonar is a volunteer-driven platform connecting investors with projects
seeking funding. Initially focused on cultural initiatives, it evolved into a broader
investment discovery portal.

• Design and develop a full-stack web platform using .NET 10 and React.
• Build and maintain serverless infrastructure using AWS Lambda and
DynamoDB.
• Leverage AI-assisted development tools (GitHub Copilot, Lovable AI) to
accelerate code generation and prototyping.
• Define product vision and drive development as a founder.

DataArt
Middle .NET Developer
January 2021 - February 2025 (4 years 2 months)
Odessa, Ukraine

• Design, develop, and maintain back-end services and APIs using C#, .NET
5–8, and ASP.NET Core.
• Participate in the development of solutions based on microservices and
service-oriented architecture (SOA).
• Implement new business features including database entities, stored
procedures, and API endpoints.
• Maintain and support existing applications, ensuring stability and
performance.
• Perform code refactoring and contribute to system architecture
improvements.
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• Develop and maintain database solutions using MS SQL Server, T-SQL,
Entity Framework Core, and Dapper.
• Integrate messaging systems and authentication mechanisms (RabbitMQ,
OAuth 2.0 with Azure AD).
• Write and maintain unit tests to ensure code quality and reliability.
• Participate in full-stack development when required (React, Razor Pages).

Projects:
• The service provision master data. Administration web servers and
databases. Сreation new entities in UI, new stored procedures in DBs and new
endpoints in API. Stack: Microsoft .NET 6, ASP.NET Core, MS SQL Server
(MDS module, T-SQL), Dapper, RabbitMQ, OAuth 2.0 with Azure AD.

• The CRM portal providing business services. Developing tasks as a back-
end developer with covering all back-end functionality with unit tests. Stack:
Microsoft .NET 6, ASP.NET Core 6, React, RealmDB, SignalR, Azure;

• The web portal for sports tourism services. Developing stories as a full-stack
developer. Stack: Microsoft .NET Core, ASP.NET Core, Razor Pages, EF
Core, T-SQL, jQuery, Bootstrap;

• The healthcare web portal. Developing tasks as a back-end developer. Stack:
Microsoft .NET Core, ASP.NET Core, Angular, microservices;

• The CRM corporate system. Developing tasks as a back-end developer.
Stack: Microsoft .NET 5, ASP.NET Core, MS SQL Server, EntityFrmaework
Core, React, GraphQL.

BIIR Bojer Innovativ Ingeniør Rådgivning
Software Engineer
April 2019 - December 2020 (1 year 9 months)
Odessa, Ukraine

• Design, develop, and maintain full-stack applications using ASP.NET Core,
React, and Redux.
• Build and maintain real-time features using SignalR.
• Develop desktop applications using WPF.
• Perform DevOps tasks including deployment, monitoring, and environment
configuration in Azure and AWS.
• Implement and support CI/CD pipelines and cloud infrastructure (Azure App
Service, Azure Pipelines).

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• Participate in system architecture design, including defining application
structure and key technical decisions.
• Collaborate within Scrum teams and participate in Agile ceremonies.
• Contribute to product planning and prioritization as part of Product Ownership
responsibilities.

Projects:
• The B2B eCommerce website. Full-stack development incuding architecture
design and DevOps tasks. After reaching the MVP1 new tasks were Scrum
Product Owning and DevOps tasks. Stack: ASP .NET Core, React, Redux,
AWS;

• The IoT management website. Developing tasks as a back-end developer
and a DevOps. Stack: ASP .NET Core, Angular, SignalR, Azure (AppService,
Azure DevOps, Azure Service Bus);

• Series of projects related to power wind generation. Desktop development.
Stack: WPF.

1000Geeks
.NET Developer
November 2017 - October 2018 (1 year)
Odessa, Ukraine

• Desktop development: WPF (all part of the desktop of the marketing
platform).
• Web development: ASP .NET Core (improvement of the existing insurance
promotion platform);
• Architecture: Blockchain (analytics, expert assessment, solution architecture
design).

ARBITAS
Software Engineer
September 2014 - February 2017 (2 years 6 months)
Odessa, Ukraine

• Develop and coordinate a team of 3 engineers in building .NET (C#) desktop
applications using WinForms and WPF.
• Design and implement software for self-service kiosks, including payment
processing and lending solutions.
• Integrate hardware devices (payment terminals, card readers, printers) with
desktop applications.

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• Support pilot operations and ensure system readiness for production
deployment.
• Participate in preparation and successful completion of government
certification and acceptance testing.

Key Market Group
Analyst, IT Specialist
April 2011 - June 2013 (2 years 3 months)
Odessa, Ukraine

• Automate reporting processes across multiple departments using VBA
(Excel, Access, PowerPoint).
• Develop solutions for marketing research and analysis of household
appliances.

Commercial Bank "Sotskombank" LLC, Odessa (Ukraine)
Leading specialist of card operations department
September 2006 - October 2010 (4 years 2 months)
Odessa, Ukraine

Administration of card issuance systems, both front-office and back-office
(AKS for NSMEP, IS-Card for VISA): administration of servers (Windows
Server), databases (Microsoft SQL Server, Firebird) and software. Automation
of reporting using SQL stored procedures. More than 150 reports have been
automated, including quarterly reports for the National Bank and Credit
Bureaus.

• Administration of card issuance systems including databases;
• Self automation of reporting;
• Formation and sending of reports to state inspections;
• Preparation for scheduled state inspections and certifications;
• Control of information exchange with the processing center;
• Setting tasks for developers of software systems;
• Testing updates for new software versions;
• Consultations of employees of department on the use of software systems;
• Arbitration technical support.

Education
Odessa National Polytechnic University
Specialist, Control systems and automation · (1999 - 2004)

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