Software Engineer / Senior Software Engineer – Dot NET

SPAN Enterprises is hiring .NET Developers to build scalable, cloud-native web applications and RESTful APIs in Rock Hill, SC.

Responsibilities

• Design, develop, and maintain scalable applications with .NET Core and ASP.NET Core
• Create secure, high-performance REST APIs
• Produce clean, maintainable, reusable code using SOLID principles
• Design efficient database schemas and optimize SQL queries
• Work with both relational and NoSQL databases
• Write comprehensive unit tests with xUnit or NUnit
• Participate in code reviews and follow engineering best practices
• Troubleshoot production issues and optimize application performance
• Collaborate with Product, QA, DevOps, and Engineering teams
• Contribute to CI/CD pipelines and deployment activities
• Join architecture discussions and technical design reviews

Requirements

• 3–6 years of experience building scalable web applications and RESTful APIs
• C#
• .NET Core / ASP.NET Core
• ASP.NET Web API
• RESTful API development
• Dependency Injection
• Entity Framework Core
• LINQ
• Basics of Authentication & Authorization (JWT/OAuth)
• HTML5 and CSS3
• JavaScript (ES6+)
• Experience with one or more:
  • Microsoft SQL Server
  • PostgreSQL
  • MongoDB
• Knowledge of query and database topics, including:
  • Query optimization
  • Stored Procedures
  • Indexing
  • Transactions
  • Database normalization
• Object-Oriented Programming (OOP)
• SOLID and Clean Code practices
• N-Tier Architecture
• Design patterns such as Repository, Factory, Strategy, etc.
• Exception Handling & Logging
• Unit Testing with xUnit/NUnit
• Debugging and Performance Optimization
• Git and Git branching strategies
• Pull Requests and participation in code reviews

Technologies

• C#, .NET Core, ASP.NET Core, ASP.NET Web API
• RESTful API development, Dependency Injection, Entity Framework Core, LINQ
• JWT, OAuth
• HTML5, CSS3, JavaScript (ES6+), React
• Microsoft SQL Server, PostgreSQL, MongoDB
• xUnit, NUnit
• SOLID, N-Tier Architecture, Git, CI/CD

Frontend

• HTML5, CSS3, JavaScript (ES6+)
• React experience is a plus

Databases

• Microsoft SQL Server
• PostgreSQL
• MongoDB

Software Engineering

• Object-Oriented Programming (OOP), SOLID Principles, Clean Code Practices
• N-Tier Architecture and design patterns (Repository, Factory, Strategy, etc.)
• Exception Handling & Logging
• Unit Testing (xUnit/NUnit)
• Debugging and Performance Optimization

Version Control

• Git
• Git branching strategies
• Pull Requests & Code Reviews

Benefits

• 401(k)
• 401(k) matching
• Dental insurance
• Flexible spending account
• Health insurance
• Paid time off
• Retirement plan
• Vision insurance

Location: Rock Hill, SC (onsite)

Compensation: USD 75,000 - 110,000 per year

Experience: 3+ years (3–6 years preferred)