Senior .NET Developer (Billing Platform)

• Contribute to development of a billing/claims platform supporting high-volume transactional systems
• Build and scale backend services and enterprise applications
• Improve and evolve existing systems and architecture
• Design scalable, maintainable, and extensible solutions
• Participate across the full SDLC, including design, development, testing, and deployment
• Collaborate cross-functionally to translate business requirements into technical solutions
• Ensure code quality through test automation
• Work on complex domain-driven problems and system integrations, Vaco by Highspring and its parents, affiliates, and subsidiaries ("we," "our," or "Vaco by Highspring") respects your privacy and are committed to providing transparent notice of our policies.
• California residents may access Vaco by Highspring HR Notice at Collection for California Applicants and Employees here.
• Virginia residents may access our state specific policies here.
• Residents of all other states may access our policies here.
• Canadian residents may access our policies in English here and in French here.
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Pay Transparency Notice

Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to:

• the individual's skill sets, experience and training;
• licensure and certification requirements;
• office location and other geographic considerations;
• other business and organizational needs.

With that said, as required by local law, Vaco by Highspring believes that the following salary range referenced above reasonably estimates the base compensation for an individual hired into this position in geographies that require salary range disclosure. The individual may also be eligible for discretionary bonuses.

• Strong experience with .NET / C#
• Experience with MS SQL Server and relational databases
• Background developing service-based / API-driven applications
• Experience with ASP.NET Core
• Familiarity with Entity Framework / EF Core
• API development tools:

• REST APIs, Swagger, Postman

• Frontend (SPA frameworks):

• Angular or React
• TypeScript, Node.js, Webpack
• Authentication: OAuth / JWT

• Architecture & Systems:

• Microservices architecture
• Distributed systems
• High-volume, event-driven / queued workflows
• Messaging tools (e.g., RabbitMQ)

• Testing:

• Unit testing / test automation

Key Traits

• Strong problem-solving skills
• Ownership mindset over applications and systems
• Focus on building high-quality, scalable solutions
• Continuous improvement mindset