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Oleh Sokolyk
Created AtUpstaffer since September, 2025

Oleh Sokolyk — Full-Stack .NET Developer

Expertise in Full Stack Web (4.5 yr.), Back-End Web (4.5 yr.).

Last verified on September, 2025

Core Skills

C/C++/C#
ASP.NET Core Framework
Entity Framework
Dapper
React
React

Bio Summary

Engineer with extensive expertise in full-stack .NET development, proficient in implementing complex server-side APIs, CRM, and e-commerce platforms. Advanced knowledge in a range of technologies including ASP.NET Core, React, Redux, Akka.NET, SignalR, EF Core, Dapper, SQL Server, AWS, and Azure. Demonstrated success in migrating legacy systems to .NET 6.0, optimizing data access, and ensuring high system reliability. Holds a Bachelor's degree in Computer Sciences and excels in integrating real-time data analytics with robust, scalable database designs. Backed with a strong foundation in software engineering practices and principles, the engineer is distinguished by their ability to deliver high-quality, maintainable, and performance-focused business solutions, having a tangible impact on operational efficiency and user engagement.

Technical Skills

Programming LanguagesTypeScript
JavaScript FrameworksAngularJS, React, Vue.js
.NET PlatformASP.NET Core Framework, Dapper, Entity Framework, Identity Server, .NET
C++ Libraries and ToolsC/C++/C#
JavaScript Libraries and ToolsWebpack
Databases & Management Systems / ORMMariaDB, Microsoft Azure SQL Server, MS SQL Server Management Studio, MySQL, PostgreSQL
Amazon Web ServicesAWS EC2
Azure Cloud ServicesAzure DevOps, Microsoft Azure SQL Server
Deployment, CI/CD & AdministrationBlazor, CI/CD
Virtualization, Containers and OrchestrationDocker, Terraform
Version ControlGit
QA, Test Automation, SecuritySelenium, xunit
Third Party Tools / IDEs / SDK / ServicesVisual Studio
Other Technical SkillsRider

Work Experience

Senior Full Stack .NET Developer, Concord CRM Integration

Duration: January 2022 – August 2025

Summary: Developed and maintained a CRM platform tightly integrated with the Concord e-shop, delivering reliable sales and financial workflows, robust third-party synchronization, role-based access control, and real-time features while modernizing the stack for performance and maintainability.

Responsibilities: Developed and maintained integrations between the Concord e-shop and CRM to synchronize sales, client records, orders, and administrative workflows. Designed and implemented core sales and order-processing logic. Built a resilient synchronization pipeline with a third-party service. Implemented role-based permission schemes. Developed cash-inflow and cash-outflow modules. Addressed production incidents and change requests. Implemented actor-based background processing with Akka.NET. Managed file processing, centralized logging, and automated report generation. Authored and optimized SQL queries and stored procedures. Migrated backend from ASP.NET Core 3.1 to .NET 6.0. Maintained API contracts and collaborated with frontend teams.

Technologies: ASP.NET Core, React, Redux, Akka.NET, SignalR, Entity Framework Core (EF Core), Dapper, MS SQL Server

Senior Full-Stack .NET Developer, Business Intelligence Solutions

Duration: March 2022 – February 2023

Summary: Delivered robust, high-performing business applications designed to support operational efficiency, real-time data analytics, seamless integration, and improved user engagement across diverse organizational workflows.

Responsibilities: Designing and implementing PostgreSQL database strategies. Establishing data integrity with stored procedures and triggers. Modernizing legacy code for better maintainability. Promoting SOLID principles through code reviews and architectural guidance. Integrating Blazor UI components with backend .NET services. Building high-performance .NET backend services. Containerizing environments with Docker to standardize builds.

Technologies: C#, .NET, Blazor, PostgreSQL, Docker, Entity Framework Core, xUnit, CI/CD

Full-Stack .NET Developer, E-Commerce Platform Development

Duration: September 2021 – September 2022

Summary: Developed and maintained core commerce functionality for an online retail platform, implementing product catalog, ordering, and user account features and performing a framework upgrade to modernize the stack.

Responsibilities: Designed and implemented the Products module and inventory management. Architected pricing and discount logic. Built the shopping cart system. Implemented server-side order processing. Developed user registration and authentication flows. Optimized data access using EF Core + Dapper. Collaborated with frontend team to align API contracts and development.

Technologies: C#, ASP.NET Core, Entity Framework Core, Dapper, React, Redux, RESTful Web API, SQL Server / T-SQL, xUnit

Full-Stack Developer, Business Intelligence Platform

Duration: September 2019 – October 2022

Summary: Built predictive analytics and test modules for business reviews, enhancing strategic decision-making through data-driven insights.

Responsibilities: Engineered ASP.NET Core Web API for real-time data synchronization. Developed complex T-SQL reporting pipelines. Employed Dapper for performance-sensitive data access. Integrated IdentityServer4 for centralized authentication. Designed actor-based processing with Akka.NET. Built front-end interfaces with React and Redux. Instituted robust source-control and release practices. Collaborated to translate business requirements into analytics features.

Technologies: C#, ASP.NET Core, Identity Server 4, Akka.NET, MSSQL, Dapper, ReactJs, Redux, xUnit, CI/CD

Full Stack Developer, Partner B2B CRM

Duration: June 2018 – October 2021

Summary: Delivered advanced CRM functionalities including dynamic promotional tools and robust analytics, significantly improving user engagement and business processes.

Responsibilities: Designed and implemented a secure partner registration and authorization system. Developed scalable server architecture and advanced partner stock management module. Spearheaded the development of an order wizard. Automated the import/export process for price lists. Created a partner dashboard with detailed pricing and discounts. Led system integration efforts.

Technologies: C#, ASP.NET Core Web API, ReactJS, Redux, TypeScript, MS SQL, T-SQL, Entity Framework, Dapper, xUnit, CI/CD, AWS

Education

  • Bachelor's degree in Computer sciences
  • Lviv Polytechnic National University
  • September 2017 – June 2021

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