Senior Backend Software Engineer - C# / .NET

Cnected; Dallas (TX); On-site; USD 95,000 - 120,000; Full time

Job summary

Cnected is looking for a Backend Software Engineer in Dallas, Texas to maintain and extend the server-side systems of our SaaS talent intelligence platform. With a focus on building and integrating ASP.NET Core Web APIs, the ideal candidate will have deep C# and .NET expertise, strong experience with Azure services, and a good understanding of Clean Architecture. Responsibilities include supporting robust backend systems, enhancing database interactions, and ensuring compliance with data security standards. This role is pivotal in optimizing services and contributing to innovative solutions.

Qualifications

• 3+ years of professional experience with C# and .NET (Core/.NET 6+).
• Strong experience building RESTful APIs with ASP.NET Core.
• Solid understanding of Clean Architecture, CQRS, and domain-driven design patterns.
• Experience with Entity Framework Core or similar ORM for SQL Server / Azure SQL.
• Experience writing and optimizing T-SQL queries and stored procedures.
• Familiarity with Azure Functions or similar serverless computing platforms.
• Experience with message-based architectures (Azure Service Bus, RabbitMQ, or similar).
• Understanding of multi-tenant SaaS application design and data isolation strategies.
• Experience writing unit tests and integration tests in .NET (xUnit, NUnit, or MSTest).

Responsibilities

• Maintain and extend multiple ASP.NET Core Web APIs serving talent management and business operations.
• Develop features across the CQRS architecture with separate command/query handlers.
• Build Azure Functions for background processing including email delivery and third-party integrations.
• Write performant queries and maintain data integrity in a multi-schema Azure SQL Database.
• Implement and maintain the multi-tenant architecture.
• Build and maintain integration capabilities with external systems.
• Write and maintain unit tests and integration tests for all backend components.

Skills

C#

ASP.NET Core

Clean Architecture

Entity Framework Core

Azure Functions

Azure SQL Database

Azure Service Bus

T-SQL

CQRS

Unit Testing

Job description

We are seeking a strong Backend Software Engineer to maintain and extend the server-side systems powering our multi-tenant SaaS talent intelligence platform. The platform is built on multiple .NET 6 Web APIs, shared core services, and Azure Functions apps, all backed by a multi-schema Azure SQL Database.

You will work within a Clean Architecture codebase using CQRS patterns, building and maintaining RESTful APIs, background processing services, and integrations with external systems (SendGrid, HelloSign, Azure Search, Azure Service Bus). This role requires deep C#/.NET expertise and the ability to work across the full backend stack from API endpoints to database queries to event-driven processing.

Qualifications

• 3+ years of professional experience with C# and .NET (Core/.NET 6+)
• Strong experience building RESTful APIs with ASP.NET Core
• Solid understanding of Clean Architecture, CQRS, and domain-driven design patterns
• Experience with Entity Framework Core or similar ORM for SQL Server / Azure SQL
• Experience writing and optimizing T‑SQL queries and stored procedures
• Familiarity with Azure Functions or similar serverless computing platforms
• Experience with message-based architectures (Azure Service Bus, RabbitMQ, or similar)
• Understanding of multi‑tenant SaaS application design and data isolation strategies
• Experience writing unit tests and integration tests in .NET (xUnit, NUnit, or MSTest)

Responsibilities

• Maintain and extend multiple ASP.NET Core Web APIs serving talent management, business operations, assessment, and external integration needs
• Develop and maintain features across the CQRS architecture with separate command/query handlers, domain models, and application services
• Build and maintain Azure Functions for background processing including email delivery, e‑signature workflows, search sync, event publishing, data warehouse ETL, report generation, and third‑party integrations
• Work with a multi‑schema Azure SQL Database to write performant queries, stored procedures, and maintain data integrity
• Implement and maintain the multi‑tenant architecture with company‑based data isolation and role‑based access control
• Develop and maintain core shared services
• Build and maintain integration capabilities with external systems via webhooks and REST APIs
• Write and maintain unit tests and integration tests for all backend components
• Implement event‑driven patterns using Azure Service Bus topics, queues, and Durable Functions for reliable workflow orchestration
• Ensure data security and compliance including audit trails, GDPR considerations, and proper handling of sensitive assessment data
• Optimize API performance through caching (Redis), query optimization, and efficient data access patterns
• Participate in code reviews, technical documentation, and knowledge sharing

Required Skills

• RBAC
• Azure Service Bus
• Azure Functions
• SQL Server
• Azure SQL Database
• Entity Framework Core
• Clean Architecture
• C#

Desired Skills

• Webhooks
• Azure Key Vault
• DACPAC
• SSDT
• Azure Redis Cache
• Azure Blob Storage
• HelloSign
• SendGrid
• Azure Cognitive Search

Engineering Eleven is dedicated to fostering a supportive and inclusive work environment where diversity is celebrated and everyone has the opportunity to thrive. We encourage applications from all qualified individuals and are dedicated to providing a workplace that is free from discrimination and harassment. Our commitment to equal employment opportunity ensures that employment decisions are based on merit, qualifications, and business needs. At Engineering Eleven, we celebrate diversity and are committed to creating an inclusive environment for all employees. We believe that a diverse workforce enhances our creativity, innovation, and growth, and we strive to ensure that everyone feels valued, respected, and empowered to bring their whole selves to work. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. Engineering Eleven is committed to creating a diverse and inclusive work environment and is proud to be an equal opportunity employer. We provide equal employment opportunities to all employees and applicants for employment and prohibit discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression or any other characteristic protected by federal, state, or local laws.