C# Application Developer

Stelvio Inc.; Plano (TX); On-site; USD 80,000 - 110,000; Full time

Job summary

Stelvio Inc. in Plano, Texas is seeking a mid-level C# Application Developer to join our growing technology business focused on high-volume POS, payment, and integration platforms used across locations.

You will build and maintain C#/.NET applications, develop REST API integrations, and help enhance real-time payment experiences. The team embraces AI-assisted development tools like GitHub Copilot, Cursor, and Claude Code to boost productivity.

Qualifications

• 3–5 years of software development experience.
• Proficient in C# and .NET / .NET Core.
• Experience building and consuming REST APIs.
• Hands-on use of AI-assisted coding tools.
• Git and Agile/Scrum experience.

Responsibilities

• Build and maintain C#/.NET applications.
• Develop third-party API integrations.
• Help improve real-time payment experiences.
• Collaborate with a team using AI-assisted development tools.

Skills

3–5 years of software development

C# & .NET / .NET Core

REST API development & consumption

AI-assisted coding tools

Git & Agile/Scrum

Tools

GitHub Copilot

Cursor

Claude Code

Job description

C# Application Developer – POS & Integrations

We’re hiring a mid-level C# Application Developer to join a growing technology business working on high-volume POS, payment and integration platforms used across thousands of locations.

You’ll build and maintain C#/.NET applications, develop third-party API integrations and help improve real-time payment experiences. You’ll also use modern AI-assisted development tools such as GitHub Copilot, Cursor and Claude Code as part of your day-to-day workflow.

What We’re Looking For:

• 3–5 years of software development experience
• Strong C# and .NET / .NET Core experience
• Experience building and consuming REST APIs
• Hands-on use of AI-assisted coding tools
• Git and Agile/Scrum experience
• Strong problem-solving and attention to detail

Nice to Have:

Experience with POS systems, payment processing, EMV, loyalty integrations, restaurant technology, CI/CD or embedded software would be highly beneficial.

This is a great opportunity to join a collaborative engineering team building customer-facing technology at scale.