Senior .NET / MS SQL Developer

Avionté; BLOOMINGTON, Northern (MN, KY); Hybrid; USD 120,000 - 150,000; Full time

Benefits offered by this job

Health & Wellness benefits

401(k) with company matching

Generous PTO and holidays

Annual performance bonus program

Job summary

Avionté is seeking an experienced .NET/C# developer to join a 100% remote team in the United States. You will design, develop, and optimize high-performance .NET web applications backed by MS SQL Server, with a focus on tuned stored procedures and scalable architectures.

The role requires expert C#/.NET programming, strong SQL Server proficiency, and the ability to own tasks end-to-end in a fast-growing, vendor-funded staffing software ecosystem. Bonus knowledge in SSRS/BI tools is a plus.

Qualifications

• 6+ years of professional .NET/C# development experience.
• Expert-level skill in writing, optimizing, and debugging C# web applications and APIs.
• 2+ years hands-on experience creating, optimizing, and debugging MS SQL Server stored procedures.

Responsibilities

• Design, develop, optimize, debug, and maintain .NET web applications backed by MS SQL Server with emphasis on stored procedures.
• Tune and optimize SQL stored procedures for speed; troubleshoot concurrency, locking, blocking, and deadlocks.
• Implement new features, client-specific customizations, and workflows in our .NET applications.

Skills

C#/.NET

SQL Server

Stored Procedures

EF Core

Performance Tuning

English Proficiency

DevExpress/BI Tools

Education

Bachelor's degree in a technical/analytical field

Tools

MS SQL Server

SSRS

Power BI

Crystal Reports

DevExpress dashboards

.NET MAUI / Xamarin

Job description

SimpleVMS, now part of Avionté Staffing Software following our 2023 acquisition, is a leading vendor-funded Vendor Management System (VMS) that streamlines contingent workforce management for mid-to-large employers. Our platform delivers real-time visibility, effortless job order distribution, integrated timekeeping, automated invoicing, compliance, and more—at no cost to clients thanks to our vendor-paid model. Recognized for years as one of Cincinnati's fastest-growing private companies, we're now part of the first North American platform uniting employer VMS, staffing agency tools, and mobile talent solutions.

You'll collaborate with 8 full-stack developers, 2 product managers, a dedicated QA engineer, and a 12+ person support team to deliver reliable, scalable solutions that power staffing efficiency for hundreds of organizations.

What You'll Own & Achieve

• Design, develop, optimize, debug, and maintain .NET web applications backed by MS SQL Server, with heavy emphasis on high-performance stored procedures (the core of this role).
• Hand-tune and optimize SQL stored procedures for speed and efficiency; troubleshoot and resolve database issues including concurrency, locking, blocking, and deadlocking scenarios.
• Implement new features, client-specific customizations, and workflows in our .NET applications.
• Ensure clean, maintainable code that adheres to best practices in a modern .NET 10 environment (Entity Framework Core in places, but optimized stored procs for critical paths).
• Contribute to code reviews and team collaboration to maintain high quality.
• (Optional/Plus) Support SQL Server Reporting Services (SSRS) as backup; we can train experienced SQL pros on this.

What You'll Bring

• 6+ years of professional .NET / C# development experience (or Bachelor's in a technical/analytical field + 4+ years).
• Expert-level skill in writing, optimizing, and debugging C# web applications and APIs.
• 2+ years hands-on experience creating, optimizing, and debugging MS SQL Server stored procedures (required; strong performance tuning is key — we use EF Core selectively but rely on tuned procs for optimal results).
• Proven SQL Server troubleshooting and performance tuning expertise, especially with concurrency/locking/blocking/deadlocking.
• Strong analytical, problem-solving, and organizational skills with exceptional attention to detail.
• Self-starter mindset — thrive in a no-micromanagement environment where you own tasks end-to-end and deliver accurately/on-time independently.
• Native/fluent English (written and spoken).
• Nice-to-Haves: Experience with DevExpress dashboards/reporting, SSRS, Power BI, Crystal Reports, or similar; .NET MAUI / Xamarin mobile development; familiarity with staffing/VMS domain.

How We Work

• 100% remote in the US, full-time (40 hours/week).
• Core collaboration hours: 11 AM – 4 PM Eastern US time.
• High autonomy and direct impact on a mission-critical platform in a growing, integrated ecosystem.
• Opportunity to work on the latest .NET 10 LTS features in a supportive team.

Compensation & Salary Range

The good-faith salary range for this position is $120,000 – $150,000 per year. Your actual base pay will depend on your skills, qualifications, and previous experience.

At Avionté, we take care of our team. Eligible employees in this role receive a comprehensive benefits package, including:

• Health & Wellness: Comprehensive medical, dental, and vision insurance plans.
• Financial Security:401(k) retirement savings plan with company matching contributions.
• Paid Time Off:Generous PTO policy and paid company holidays.
• Additional Incentives: Participation in our annual performance bonus program and more.