Vitalii

VITALII YAREMA
Senior C# .NET Software Engineer
E-mail: [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)

SUMMARY
Senior C# .NET Software Engineer with 10+ years of experience building desktop, web, and cloud applications using the full Microsoft technology stack. Strong background in developing and maintaining enterprise‑level systems, microservices, and high‑load applications. Skilled in modern .NET development, distributed systems, databases, and cloud platforms (Azure/AWS). Experienced working with international teams across the USA, Australia, and Europe. Focused on clean architecture, performance optimization, and delivering reliable, maintainable solutions.

CORE SKILLS
Languages: C# (.NET), SQL, T‑SQL, PL/SQL, JavaScript, TypeScript, C/C++, PHP
Backend: ASP.NET, Web API, REST, Entity Framework, Dapper, SignalR, Microservices
Frontend: Blazor, React, Angular, Vue, jQuery, HTML/CSS, Bootstrap
Desktop: WinForms, WPF, XAML
Cloud & DevOps: Azure, AWS, Docker, CI/CD, Jenkins, TeamCity, Azure DevOps
Databases: MS SQL, Oracle, PostgreSQL, MySQL, MongoDB
Tools & Concepts: Multithreading, async programming, Unit Testing, Git, SVN, Jira, Swagger, Redis, WebSockets, Agile/Scrum

PROFESSIONAL EXPERIENCE

Senior C# .NET Software Engineer
Dec 2024 – Present
Employer - Started in Norwegian Company which has become the part of the USA based company – Ripple operations - https://www.rippleoperations.com/
WEB app:
• Developing and maintaining distributed web services and backend modules using C# .NET, JavaScript, Web API, SQL, DevExpress, MS SQL, Azure.
• Implementing new UI components and improving existing functionality in a large enterprise system, including by clients’ requests.
• Designing and optimizing REST APIs, improving performance and reliability.
• Refactoring legacy modules to modern .NET standards, improving maintainability.
• Collaborating with an international distributed team (Europe/USA/Asia) using Agile/Scrum.
• Participating in code reviews, architectural discussions, and technical decision‑making.
• Troubleshooting production issues and improving system stability.

Self‑Employed Software Engineer
Dec 2023 – Nov 2024
• Delivered multiple custom software solutions for the USA based clients using C# .NET, WinForms/WPF, ASP.NET, SQL.
• Built and enhanced web applications, desktop tools, automation utilities, and REST APIs.
• Designed application architecture, database schemas, and deployment pipelines.
• Implemented integrations with third‑party APIs and cloud services.
• Managed full SDLC: requirements gathering, planning, development, testing, deployment, and support.
• Improved client systems’ performance and reliability through refactoring and optimization.
• Communicated directly with clients, providing technical consulting and solution design.

Senior C# .NET Software Engineer
Jun 2019 – Nov 2023
Employer - GlobalLogic Ukraine - https://www.globallogic.com/ua/
Project 1 — for Australian branch of the company Resmed in the USA - https://www.resmed.com/
Desktop app WinForms/WPF:
• Supported and enhanced a large enterprise WinForms/WPF application used by thousands of users.
• Modernized legacy modules, migrated components to newer .NET versions, and improved UI/UX.
• Implemented new business‑critical features and optimized performance of heavy modules.
• Refactored outdated code, introduced clean architecture principles, and improved maintainability.
• Led modernization of core modules and mentored junior developers.
• Improved application stability by resolving complex production defects.
Project 2 — for Deluxe Media Inc. in the USA - https://www.bydeluxe.com/
WEB Microservices:
• Developed and maintained media‑processing microservices using ASP.NET Web API, React, JavaScript, Docker, PostgreSQL, AWS, LINQPad, DBeaver.
• Added new microservices and extended existing ones to support new workflows.
• Improved API performance and reduced processing time through optimization and caching.
• Enhanced system reliability by fixing production issues and improving monitoring/logging.
• Participated in architectural improvements and design of new service components.
• Collaborated with US‑based teams in a long‑term distributed environment.

C# .NET Software Engineer
May 2018 – Jun 2019
Employer - Enamine Ltd (Ukraine) - https://enamine.net/
Desktop app WinForms/WPF:
• Supported and extended internal CRM/ERM systems built with WinForms, WPF, Oracle.
• Implemented major new features and refactored existing modules to improve performance.
• Integrated peripheral devices via COM ports, enabling automated data exchange.
• Developed and optimized numerous Oracle stored procedures and database logic.
• Created a VSTO Outlook add‑in used for internal communication and workflow automation.
• Improved system stability by resolving critical bugs and optimizing heavy operations.

C# .NET Developer
Oct 2017 – Apr 2018
Employer - EPAM Systems (Ukraine) - https://www.epam.com/
WEB app:
• Worked in a pre‑production lab on an ASP.NET Web API + AngularJS single‑page application.
• Developed backend services and integrated frontend components.
• Participated in API design, data modeling, and performance optimization.
• Collaborated with cross‑functional teams to deliver new features and improve system quality.

C# .NET Developer
May 2017 – Aug 2017
Employer - DDC Digital Solutions (Ukraine)
WEB app:
• Extended internal web applications for Brandbank using ASP.NET MVC, TypeScript, SQL.
• Developed backend modules and implemented new frontend components.
• Created new SQL stored procedures and optimized existing ones for better performance.
• Improved system functionality and stability through bug fixing and refactoring.

C# .NET Developer
Apr 2017 – May 2017
Employer - Breeze Software (Ukraine)
WEB app:
• Supported and enhanced a municipal government website for Los Angeles, CA.
• Added new backend functionality and updated frontend components using JavaScript, Razor.
• Worked with GIS‑related features and map‑based data visualization.
• Improved system usability and performance through targeted enhancements.

Software Developer (C# .NET / PHP)
Sep 2014 – Apr 2017
Employer - Sitam Ltd (Ukraine)
Desktop app WinForms/WPF:
• Developed desktop app for e-commerce, which worked with web servers and sql servers.
• Developed websites and more than 10 custom modules for OpenCart (e‑commerce).
• Built features such as popup cart, filtering modules, and other extensions using PHP, MySQL, JavaScript, jQuery.
• Implemented new functionality and optimized existing modules to improve performance and UX.
• Collaborated with designers and stakeholders to deliver high‑quality e‑commerce solutions.

EDUCATION
• Bachelor of Computer Science (Software Engineering) National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 2016 – 2019