Senior Backend Engineer

This is a remote position.

*MUST BE AVAILABLE FOR MEETINGS BETWEEN THE HOURS OF 7:30 AM AND 1 PM PACIFIC*

About the Company

Innfinity is a profitable, bootstrapped B2B SaaS company that has been serving the hospitality industry for 30 years. Our software solutions streamline all aspects of FIFO (fly-in fly-out) travel and remote camp management for companies in the mining, energy, and construction sectors. We provide technology that facilitates operations for travel coordinators, on-site camp staff, camp and project management, and everyone in-between. We are at a critical growth stage where engineering capacity is our primary constraint, and need experienced engineers to help them scale.

Technical Environment

• Small, experienced engineering team of 5 developers (2 backend, 3 frontend)
• Backend: C#/.NET, SQL Server (99.9%), SQLite, REST APIs, WCF services
• Frontend: Angular, Legacy MVC, Legacy Windows Forms
• Mobile: MAUI for cross-platform applications (Android/iOS/Windows)
• Infrastructure: Azure cloud (hosting and virtual machines) with some on-premises client deployments
• Azure Communication Services for SMS and telephony
• Following Agile methodology

Key Responsibilities

• Lead the design, development, and modernization of backend systems using C#/.NET, SQL Server, and REST APIs
• Drive architecture decisions and guide the migration from legacy technologies (Windows Forms, TFS) to modern web stacks and Git
• Optimize complex SQL queries and system performance across both cloud and on-premises environments
• Provide technical leadership through mentoring, code reviews, and enforcing coding standards
• Collaborate closely with cross-functional teams and leadership, primarily during core hours (7:30am–1pm Pacific), especially during the initial ramp-up period of 4-6 months
• Participate in pair programming, share knowledge, and support ongoing SOC 2 Type 2 compliance
• Analyze and manage complex business logic with high configuration variability
• Handle production issues and participate in on-call rotations post ramp-up, with flexibility for urgent enterprise support

Required Qualifications

• 3-5+ years of backend development experience
• Advanced proficiency in C#/.NET, SQL Server (including stored procedures, dynamic SQL, and query optimization)
• Strong experience with REST APIs and service-oriented architecture
• Proven ability to modernize legacy systems and work on enterprise software
• Solid system design and architecture skills
• Experience independently leading technical projects and mentoring developers
• Fluent in English with excellent communication and problem-solving skills
• Ability to pass a background check

Preferred Qualifications

• Expertise in database performance tuning (highly preferred)
• Experience with Windows Forms and legacy desktop applications
• Familiarity with Angular or other modern frontend frameworks
• Knowledge of Azure cloud services and DevOps practices
• Exposure to TFS/Azure DevOps Server
• Experience with embedded analytics, BI/reporting platforms
• Mobile app development with MAUI or Xamarin
• Comfortable in fast-paced, client-driven environments

What the Company Offers

• Competitive salary
• Fully remote position with flexible work environment
• Direct collaboration with leadership team
• Opportunity to shape technical direction of the company
• Significant impact on core product development
• Work with a profitable, bootstrapped company serving global enterprise clients