Backend .NET Engineer - REST APIs, SQL, Azure

Ethereum Technologies; Tampa (FL); On-site; USD 90,000 - 120,000; Full time

Job summary

Ethereum Technologies in Tampa, FL is seeking a .NET Developer to design, develop, and maintain enterprise applications using C# and ASP.NET Core. You will build RESTful APIs, backend services, and robust data access layers while ensuring security, scalability, and performance.

You will implement business logic, authentication, and authorization, develop database objects, and optimize SQL queries. Collaboration with architects, QA, and product teams, plus experience with CI/CD and cloud

Qualifications

• Proven experience with ASP.NET MVC, Web API, and RESTful services.
• Strong SQL Server skills incl. T-SQL and stored procedures; ability to optimize queries.
• Experience with EF Core, LINQ, and Dapper for data access.
• Cloud experience with Azure or AWS; service deployment and scaling.
• Familiarity with unit and integration testing frameworks (xUnit, NUnit, Moq).
• Solid OO design, SOLID, design patterns, and DI across services.
• Experience with CI/CD practices, preferably via Azure DevOps.
• Ability to work in an Agile/Scrum environment and participate in code reviews.

Responsibilities

• Design, develop, and maintain enterprise applications in C# and ASP.NET Core.
• Build RESTful APIs and backend services for web and business apps.
• Implement business logic, validation, authentication, and authorization.
• Develop database objects and optimize SQL queries.
• Integrate with internal systems, third‑party APIs, and external services.
• Apply DI, asynchronous programming, and robust exception handling.
• Write unit and integration tests to ensure reliability.
• Troubleshoot defects and perform root-cause analysis for incidents.
• Participate in code reviews and maintain coding standards.
• Deploy and support apps using Azure DevOps or similar CI/CD tools.
• Collaborate with architects, QA, BAs, and product teams.
• Participate in Agile ceremonies and sprint planning.
• Maintain technical docs and contribute to performance improvements.

Skills

ASP.NET MVC

Web API

RESTful services

SQL Server

T-SQL

Stored procedures

Entity Framework Core

LINQ

Dapper

Azure or AWS

xUnit

NUnit

Moq

Unit testing

Integration testing

Object-oriented programming

SOLID principles

Design patterns

Dependency injection

Azure DevOps

CI/CD

Tools

Azure DevOps

CI/CD tools

Job description

Ethereum Technologies in Tampa, FL is seeking a .NET Developer to design, develop, and maintain enterprise applications using C# and ASP.NET Core. You will build RESTful APIs, backend services, and robust data access layers while ensuring security, scalability, and performance.

You will implement business logic, authentication, and authorization, develop database objects, and optimize SQL queries. Collaboration with architects, QA, and product teams, plus experience with CI/CD and cloud