Senior .NET Full-Stack Engineer for Enterprise SaaS

Transit Technologies; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Transit Technologies is seeking a Senior Full Stack Developer to design, build, modernize, and support secure, scalable enterprise web and SaaS applications. You will work across the full software development lifecycle including backend services, APIs, databases, and automated testing.

Our environment blends legacy .NET Framework 4.8.x technologies with modern .NET 6/8, requiring hands-on experience and strong ownership. You will mentor peers and help raise engineering standards across the team.

Qualifications

• 6+ years of professional software development experience with full stack responsibilities.
• Strong hands on experience with C#, ASP.NET Web Forms, MVC, Web API, and .NET Framework 4.8.x.
• Professional experience with modern .NET (6 or 8) development.
• Strong SQL development skills and data modeling.
• Experience designing and securing RESTful APIs.
• Experience with Git, PRs, code reviews, CI/CD practices.

Responsibilities

• Design, develop, test, and maintain enterprise web and SaaS applications using C#, ASP.NET, and .NET ecosystem.
• Modernize existing applications while supporting new features across the full stack.
• Build scalable backend services, reusable business logic, and secure APIs.
• Optimize SQL queries and data models in SQL Server / PostgreSQL.
• Collaborate with Product, QA, DevOps, and Engineering to deliver dependable solutions.
• Contribute to CI/CD and maintain technical documentation.

Skills

Senior-level experience

C#

ASP.NET Web Forms

MVC

Web API

.NET Framework 4.8.x

.NET 6/8

SQL development

RESTful APIs

Git and CI/CD

Problem solving

Ownership

Communication

Education

Bachelor's degree in Computer Science or related field

Tools

GitHub

Azure DevOps

Job description

Transit Technologies is seeking a Senior Full Stack Developer to design, build, modernize, and support secure, scalable enterprise web and SaaS applications. You will work across the full software development lifecycle including backend services, APIs, databases, and automated testing.

Our environment blends legacy .NET Framework 4.8.x technologies with modern .NET 6/8, requiring hands-on experience and strong ownership. You will mentor peers and help raise engineering standards across the team.