Senior Software Engineer

Earnmodes; Wilmington (DE); On-site; USD 130,000 - 180,000; Full time

Job summary

Earnmodes in Wilmington, DE, is seeking a hands-on Senior Software Engineer (5-8 years) to build and scale modern enterprise applications. You will develop backend services in C# / .NET and frontends in React/TypeScript, contribute to architecture, and mentor teammates while staying hands-on.

AI is central to our work; you will use AI coding assistants like Copilot to accelerate development and deliver AI-enabled features and intelligent workflows.

Qualifications

• 5-8 years of hands-on software development experience.
• Strong expertise in C# / .NET / ASP.NET Core.
• Experience with React and TypeScript.
• Web APIs and backend service development.
• SQL Server and ORM tools (EF / Dapper).
• Experience with AI coding tools in day-to-day development.
• Working knowledge of cloud deployment, ideally Azure.

Responsibilities

• Design, develop, and own backend services and APIs using C# / .NET / ASP.NET Core.
• Build responsive frontends using React and TypeScript.
• Leverage AI coding assistants to accelerate development and add AI-enabled features.
• Contribute to architecture, data flows, and integration patterns.
• Make sound design decisions balancing scalability and maintainability; ensure CI/CD practices.
• Mentor developers, conduct code reviews, and stay hands-on.

Skills

C# / .NET / ASP.NET Core

React

TypeScript

Web APIs

SQL Server

ORMs (EF / Dapper)

Azure Cloud

AI coding tools (Copilot)

Tools

GitHub Copilot

Job description

Job Description

Senior Software Engineer

Role Overview

We are seeking a hands-on Senior Software Engineer (5-8 years) with strong full-stack skills across C# / .NET and React to build and scale modern enterprise applications.

This role centers on deep development expertise with practical component and application design responsibilities. You will build backend services in C# / .NET and modern frontends in React/TypeScript, contribute to application architecture, and mentor other engineers while staying hands-on. AI is central to how we work and what we build - both as a development accelerator and as a capability within our products.

Key Responsibilities

• Design, develop, and own backend services and APIs using C# / .NET / ASP.NET Core
• Build responsive, maintainable frontends using React and TypeScript
• Use AI coding assistants (e.g., Copilot) to accelerate development, and help build AI-enabled features and intelligent workflows within our products
• Contribute to application and component architecture, including component design, data flows, and integration patterns
• Make sound design decisions at the feature/component level, balancing scalability, performance, maintainability, and delivery speed
• Mentor developers, conduct code reviews, and share technical knowledge while remaining hands-on with coding
• Design and implement data access layers using SQL Server
• Deploy and run applications in the cloud (Azure)
• Ensure best practices in code quality, testing, security, and CI/CD
• Collaborate with product owners and stakeholders to translate requirements into technical solutions
• Troubleshoot production issues and drive performance optimization and reliability improvements
• Promote reusable design patterns and improve overall engineering standards

Required Experience

• 5-8 years of hands-on software development experience
• Strong expertise in:C# / .NET / ASP.NET Core
• React and TypeScript
• Web APIs and backend service development
• Entity Framework / Dapper or similar ORM tools
• SQL Server (schema design, query optimization)
• Experience using AI coding tools (e.g., GitHub Copilot) in day-to-day development
• Working knowledge of cloud deployment, ideally Azure (App Service, Azure SQL)