World Tech Recruiting - Senior Backend Engineer - C#/.NET

Client: World Tech Recruiting

Location: Calgary, AB, ca

Contract: Freelance

Job Description

This is a remote position. Candidates must be available for meetings between the hours of 7:30 AM and 1 PM Pacific.

About the Company: Our Client is a profitable, bootstrapped B2B SaaS company that has been serving the hospitality industry for 30 years. Their 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. They provide technology that facilitates operations for travel coordinators, on-site camp staff, camp and project management, and everyone in-between. They’re at a critical growth stage where engineering capacity is their primary constraint, and need experienced engineers to help them scale.

Technical Environment: The engineering team is small and experienced, consisting of 5 developers (2 backend, 3 frontend). The backend technology stack includes C#/.NET, SQL Server (99.9%), SQLite, REST APIs, and WCF services. The frontend leverages Angular, Legacy MVC, and Legacy Windows Forms. Mobile applications are developed using MAUI for cross-platform compatibility (Android/iOS/Windows). Hosting and infrastructure utilize Azure cloud, with some on-premises client deployments and Azure Communication Services for SMS and telephony. The team follows 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 during core hours, 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.

Requirements

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.

Other Information

• 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.