Oleh Skalievoi
Founder | .NET Developer @ Sjonar
About
Full-Stack .NET development (ASP .NET Core, React, AWS, Azure DevOps).
Ukraine
Odesa
Program Development
C#, .NET, React.js, .NET 9, Azure DevOps, .NET Core, SQL, git, JIRA, Lovable AI Web Development, ASP.NET MVC, WPF, HTML, CSS, Bootstrap, JQuery, AJAX, WCF, Angular 19, ASP .NET Web Forms
Experience

Founder | .NET Developer
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.

Middle .NET Developer
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. • 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.

Software Engineer
BIIR Bojer Innovativ Ingeniør Rådgivning
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). • 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.

.NET Developer
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).

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

Analyst, IT Specialist
Key Market Group
Odessa, Ukraine
• Automate reporting processes across multiple departments using VBA (Excel, Access, PowerPoint). • Develop solutions for marketing research and analysis of household appliances.

Leading specialist of card operations department
Commercial Bank "Sotskombank" LLC, Odessa (Ukraine)
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.
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