Senior/Principal C#/.NET AI Developer — Modernization & AI

High Country Search Group; Denver (CO); On-site; USD 150,000 - 235,000; Full time

Benefits offered by this job

Health coverage

401(k) match

5–7 weeks vacation

Parental leave

Free daily lunch

Parking/transit

Wellness benefits

Student loan assistance

Job summary

High Country Search Group is seeking Senior & Principal C# / .NET/AI Developers for an Application Modernization & AI initiative in the Oil & Gas sector. You will help modernize legacy applications and drive AI-enabled development.

The roles require 10+ years in C#, .NET, and SQL Server, plus hands-on AI tooling experience. Denver-area residents who can be onsite 4 days a week are preferred. Competitive base salaries with annual bonuses and stock grants are offered.

Qualifications

• 10+ years of engineering experience, with heavy focus on C#, .NET, and Microsoft SQL Server.
• Hands-on experience with AI-assisted coding tools (Claude Code, GitHub Copilot, OpenAI Codex) and AI-forward transformation.
• Experience with Microsoft Azure, Infrastructure as Code, Git, and CI/CD pipelines; strong automated testing (unit/integration/e2e).
• Bachelor’s degree in Computer Science, Engineering, or related field.
• Experience in oil & gas, energy, or asset-intensive industries.

Job description

High Country Search Group is seeking Senior & Principal C# / .NET/AI Developers for an Application Modernization & AI initiative in the Oil & Gas sector. You will help modernize legacy applications and drive AI-enabled development.

The roles require 10+ years in C#, .NET, and SQL Server, plus hands-on AI tooling experience. Denver-area residents who can be onsite 4 days a week are preferred. Competitive base salaries with annual bonuses and stock grants are offered.