Rodion

Rodion Klochkov
.NET Software Engineer
.NET Software Engineer with 5+ years of commercial experience developing and maintaining
applications using C#, .NET, ASP.NET Core and MS SQL Server. Experienced in backend
development, REST APIs, business logic, database development, background processing and
system integrations. Worked with enterprise web and desktop applications, large existing codebases,
production issue investigation, performance improvements and legacy code refactoring.

WORK EXPERIENCE
.NET Software Developer at GeekGroup, USA
April 2025 - Present
• Developed and maintained enterprise web applications for managing programs, events, speakers,
attendees and related business processes across multiple client projects.
• Implemented new features and business logic using C#/.NET, ASP.NET, Entity Framework and MS
SQL Server.
• Worked on business workflows including status changes, cancellations, milestones, invitations,
permissions, sponsorships and budgeting.
• Developed functionality for MER and REP portals, including forms, validation, search, filters and
client-specific configuration.
• Worked with SQL Server, stored procedures and Entity Framework to implement data-related
functionality and investigate application issues.
• Developed and maintained REST API integrations, including migration of an external API
connection from TLS to mutual TLS (mTLS).
• Investigated and fixed production and UAT issues involving performance, HTTP 500/504 errors,
reports, time zones, notifications and data processing.
• Maintained and improved existing enterprise code, fixed regression issues and supported different
client configurations within the same platform.
.NET Software Developer at Fozzy Group, Ukraine – Kyiv
Jul 2022 – September 2026
• Developed and maintained backend services for internal retail systems using C#, ASP.NET Core,
Entity Framework Core and MS SQL Server.
• Implemented new features and business logic for store operations, task management,
merchandising, pricing, checklists, employee workflows and internal analytics.
• Developed REST APIs and integrations between internal services and external systems.
• Worked with Hangfire, RabbitMQ, Redis and SignalR for background processing, messaging,
caching and real-time updates.
• Worked extensively with MS SQL Server, including queries, stored procedures, views and
database-related performance improvements.
• Developed and maintained desktop applications using Avalonia UI and MVVM for store terminals,
including electronic queue and label-printing systems.
• Implemented local data storage and synchronization for store applications, allowing them to
continue working when connection to backend services was temporarily unavailable.
• Developed a .NET Worker Service for automatic processing and distribution of planogram files
between internal systems and store network folders.
• Integrated applications with Elasticsearch, MinIO, Azure services and other internal company
systems.
• Investigated and fixed production issues, improved existing functionality and refactored legacy code.

.NET Software Developer at IT-ENTERPRISE ERP, Ukraine – Kyiv
Feb 2022 – Jan 2023
• Developed and maintained backend functionality for ERP business automation modules using C#
and MS SQL Server.
• Implemented data-processing logic using SQL, T-SQL and LINQ.
• Developed and updated stored procedures, functions and database logic.
• Fixed defects and improved existing ERP functionality.
• Worked with an existing enterprise codebase while maintaining compatibility with current business
processes.

.NET Software Developer at PosiTrace by GFM, Ukraine – Kramatorsk
Jun 2021 – Jan 2022
• Developed and maintained web application functionality using .NET and MS SQL Server.
• Implemented backend features and database-related changes.
• Participated in development, testing and bug fixing of existing functionality.
• Refactored existing code and improved maintainability of legacy modules.

EDUCATION

Donbass State Engineering Academy, Ukraine – Kramatorsk
Sep 2012 – Dec 2017
Master’s Degree in Automation and Computer-Integrated Technologies

TECHNICAL SKILLS
Backend: C#, .NET, ASP.NET Core, ASP.NET MVC, Web API, Entity Framework / EF Core, LINQ,
Dapper
Database: MS SQL Server, T-SQL, Stored Procedures, Views, Redis
Architecture & Patterns: MVC, MVVM, CQRS, MediatR, Clean Architecture, Repository Pattern,
Dependency Injection
Messaging & Background Processing: RabbitMQ, MassTransit, Hangfire, Azure Service Bus
Search & Storage: Elasticsearch, MinIO, Azure Blob Storage
Desktop & UI : Avalonia UI, XAML, Razor, Blazor, JavaScript, TypeScript
Communication: REST, HTTP/S, SignalR, gRPC, TCP/IP
Tools & Infrastructure: Git, Bitbucket, GitHub, Jira, TeamCity, Docker, Kubernetes, Prometheus,
Grafana

LANGUAGES
• Ukrainian – Native
• English – B1

Dnipro / Kyiv, Ukraine
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