Senior Backend Engineer - Azure/.NET APIs (Contract-to-Hire)

Kforce Inc; St. Louis (MO); On-site; USD 120,000 - 160,000; Full time

Job summary

Kforce is seeking a Senior Software Engineer in Saint Louis, MO, to design, build, and optimize core back-end services using C#, .NET, ASP.NET Core, and Azure. This role focuses on high-volume, scalable systems and requires strong design, testing, and DevOps practices.

You will collaborate with Product, QA, and Engineering to deliver robust back-end solutions, mentor peers, and help steer architectural decisions in a fast-paced environment.

Qualifications

• Bachelor's degree in Computer Science or related field (or equivalent).
• 7+ years of professional software development experience.
• Experience optimizing back-end performance with SQL Server and Azure.
• Strong C#, .NET, ASP.NET Core and RESTful APIs expertise.

Responsibilities

• Design, develop, and maintain back-end services using C#, .NET, ASP.NET Core, and Azure.
• Build high-performance APIs and services focused on scalability and reliability.
• Profile and tune performance: latency, memory usage, and throughput.
• Design cloud-native solutions leveraging Azure services and caching.
• Translate business requirements into scalable architectures and code.
• Participate in code reviews, technical design discussions, and architecture decisions.
• Troubleshoot and resolve production issues in large-scale systems.
• Mentor engineers and contribute to raising technical standards.

Skills

C#

.NET

ASP.NET Core

REST APIs

SQL Server

Azure

CI/CD

Distributed systems

Education

Bachelor's degree in Computer Science or related field

Tools

Azure DevOps

Entity Framework Core

SQL Server

Azure

Job description

Kforce is seeking a Senior Software Engineer in Saint Louis, MO, to design, build, and optimize core back-end services using C#, .NET, ASP.NET Core, and Azure. This role focuses on high-volume, scalable systems and requires strong design, testing, and DevOps practices.

You will collaborate with Product, QA, and Engineering to deliver robust back-end solutions, mentor peers, and help steer architectural decisions in a fast-paced environment.