Senior .Net Full-stack Engineer

Software Engineer (C# .NET) – Barging Logistics System

Location: Remote (Ukraine) – Project in the USA

Employment Type: Full-time

English Proficiency: B2-C1 required

About the Engagement:

Happen Technologies, a US-based software development firm, is seeking an additional development team member for one of their client teams.  This team is focused on developing a logistics management system which is responsible for river transportation, trip management, and billing automation for the Barging industry. The system is built using C# .NET 7.0, and it involves:

• Database management using MS SQL with Dapper ORM (ListQuery pattern) for efficient queries.
• Web application development using ASP.NET MVC with JavaScript and jQuery (DataTable) on the frontend.
• Complex billing logic based on boat and barge events.

About Happen Technologies:

Happen Technologies is a technology company founded in 2018 by two former software engineers.  With their headquarters based in St. Louis, Missouri, Happen specializes in technology strategy consultation, custom software solution development and long-term contract-based staffing services.

Technical Requirements

Must-Have Skills

• C# .NET (7.0+) – Strong experience with ASP.NET MVC and Web API development.
• MS SQL (T-SQL, Dapper) – Ability to write optimized queries, work with transactions, and implement audit logging.
• JavaScript, jQuery, and DataTables – Frontend handling for dynamic data tables and modals.
• Unit Testing & Debugging – Writing clean, testable code and debugging using tools like Postman and Swagger.

Soft Skills & Cultural Fit

Since this role involves collaboration between Ukrainian and U.S. teams, the candidate must be very comfortable with cultural and time zone differences.

Must-Have Soft Skills

• English Proficiency (B2-C1 required) – Ability to discuss both business and technical details and converse comfortably in client meetings.
• Proactive Problem-Solving – Ability to work independently and suggest improvements.
• Cross-Cultural Collaboration – Comfortable working with American and international colleagues.
• Adaptability to Different Workflows – Willingness to follow client business processes and Agile methodologies.
• Attention to Detail & Accountability – Responsibility for code quality, performance, and reliability.

Additional Details

• Time Zone Overlap: Availability for at least 4 hours of overlap with U.S. business hours (EST or CST preferred).
• Contract Type: Full-time remote contract.
• Compensation: Competitive salary based on experience and skills.