Olesia S.

I help businesses build, improve, and maintain web applications, backend systems, and API integrations using C#, .NET, and ASP.NET Core. With 6+ years of software development experience, I work on backend development, database-driven applications, REST API development, third-party integrations, and workflow automation. My goal is to deliver clean, maintainable code and reliable solutions that fit your business requirements. Here's how I can help: Backend Development: Build and maintain web applications using C#, .NET, ASP.NET Core, and Entity Framework. REST API Development: Design, develop, extend, and troubleshoot APIs for web applications and external services. Database Development: Work with SQL Server and MySQL, including database queries, data access, and performance optimization. API & Third-Party Integrations: Connect applications and services to automate data exchange and business processes. Workflow Automation: Implement workflow logic and business process automation using Elsa Workflows. CI/CD Automation: Configure and maintain GitLab CI/CD pipelines to automate application builds and deployment processes. Existing Application Support: Debug issues, fix bugs, improve performance, and extend existing functionality. Technical stack: Languages: C#, JavaScript, TypeScript, SQL Backend: .NET, ASP.NET Core, ASP.NET MVC, Entity Framework APIs & Architecture: REST APIs, API integrations, microservices Databases: Microsoft SQL Server, MySQL, Oracle Frontend: Angular, Vue.js, HTML, CSS, Bootstrap Automation: Elsa Workflows CI/CD: GitLab CI/CD, automated builds, deployment automation I have experience working on business applications, including telecom BSS systems, real-time game server APIs, and pricing automation and eBay integrations. I value clear communication, thoughtful problem-solving, and code that is easy to maintain. Whether you need a new backend feature, an API integration, help with an existing .NET application, or workflow automation, I can help you move your project forward.