Sr Billing Engineer (.NET/C#)

Location: Virtual Poland

Company

hirify.global provides data and software services that connect digital experiences across the vehicle lifecycle, homes, and digital identities.

What you will do

• Design, develop, test, and maintain financial system applications using C#, .NET Core/.NET 6+, ASP.NET Core MVC, and Web APIs.
• Develop queries, stored procedures, data models, API-enabled components, and integrations with databases, cloud services, third-party APIs, and identity providers.
• Configure billing models, coordinate monthly billing cycles, and support system-generated invoice attachments and month-end close activities.
• Analyze large datasets to investigate billing discrepancies and resolve defects in established systems.
• Improve CI/CD automation, migrate legacy applications to the cloud, and deliver operationally stable software.
• Participate in architecture and solution planning, define non-functional requirements, and mentor junior developers.

Requirements

• At least 5 years of professional experience with the listed technologies and responsibilities.
• Strong knowledge of Transact-SQL, .NET/C#, ASP.NET WebAPI or ASP.NET Core, and SQL Server databases.
• Experience with TDD/BDD and REST/SOAP web services.
• Ability to create PowerBI or JasperReport reports and intermediate MS Excel knowledge.
• Fluency in English is required.
• Accuracy, attention to detail, organization, prioritization, problem-solving, and effective teamwork.

Nice to have

• German language knowledge.

Culture & Benefits

• Virtual work arrangement in Poland.
• Opportunity to work in a small team supporting financial systems development and maintenance.
• Responsibilities cover the full software development life cycle.
• Occasional evening or weekend work may be required for month-end close and billing activities.