Senior .NET Backend Engineer - Production-First, Equity

Billee.AI; Dallas (TX); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health, dental, vision insurance

401(k)

Paid time off

Professional development

Equity

Job summary

Billee Technologies Inc. in Dallas seeks a Senior Backend .NET Developer to maintain and extend a dual-stack platform (legacy .NET 4.8 WebForms/MVC and .NET 8 API). You will fix production issues, ship features, and build robust REST APIs powering a modern frontend.

You will collaborate with a 10-person team, contribute to modernization, and support integrations with property management systems while ensuring reliability and data integrity.

Qualifications

• 8+ years of backend development experience in the .NET ecosystem.
• Strong command of C# and ASP.NET.
• Experience with relational databases, including SQL Server, PostgreSQL, or MySQL.
• Demonstrated experience maintaining and enhancing production applications at scale.
• Strong debugging and troubleshooting skills in production environments.
• Experience with multi-tenant SaaS platforms.
• Clear written and verbal communication skills, with the ability to collaborate across a distributed engineering team.

Responsibilities

• Platform maintenance and bug resolution across legacy and modern .NET stacks.
• Feature development and enhancements across the platform.
• REST API development to power modern frontend and integrations.
• Integrations support with property management systems and data flows.
• Contribute to modernization roadmap with senior architects.

Skills

Backend .NET

C# / ASP.NET

SQL Databases

Production support

Debugging

Multi-tenant SaaS

Communication

Tools

SQL Server

PostgreSQL

MySQL

Job description

Billee Technologies Inc. in Dallas seeks a Senior Backend .NET Developer to maintain and extend a dual-stack platform (legacy .NET 4.8 WebForms/MVC and .NET 8 API). You will fix production issues, ship features, and build robust REST APIs powering a modern frontend.

You will collaborate with a 10-person team, contribute to modernization, and support integrations with property management systems while ensuring reliability and data integrity.