Sr. Net Engineer

Quantum Technologies. LLC; Wilmington (DE); On-site; USD 110,000 - 170,000; Full time

Job summary

Quantum Technologies. LLC is seeking a skilled software engineer to design, develop, and maintain scalable .NET applications with Blazor front-ends. You will leverage AI-assisted tools to improve code quality, testing, and delivery within Agile teams.

Responsibilities include building AI-enabled workflows, optimizing data models with EF Core/SQL Server, and contributing to CI/CD and modern SDLC practices. Collaboration across disciplines is essential.

Qualifications

• Proficiency in design, development and maintenance of scalable .NET applications.
• Experience with Blazor Server/WebAssembly and modern frontend patterns.
• Strong knowledge of EF Core, SQL Server and data modeling.
• Hands-on with AI-enabled development and AI-assisted tooling.

Responsibilities

• Collaborate with cross-functional teams to deliver high-quality software.
• Participate in sprint planning, code reviews, testing and CI/CD.
• Troubleshoot performance, testing and reliability issues.
• Design, build and support AI-enabled applications and workflows.
• Evaluate AI-assisted SDLC practices and improve efficiency.

Skills

C# / .NET Core

Blazor

AI-assisted development

Entity Framework Core

SQL Server

Azure Functions

Bootstrap

Agile methodologies

LLM architecture

Prompt engineering

AI-enabled workflows

Playwright testing

CI/CD

AI SDLC

Tools

Azure AI Foundry

Azure OpenAI Service

Vector databases

Job description

What technical skills, experience and qualifications do you need?

• Design, develop, and maintain scalable, modular applications using C# and .NET Core.
• Build and enhance modern web applications using Blazor Server, Blazor WebAssembly, or similar front-end frameworks.
• Leverage AI-assisted development tools (e.g., GitHub Copilot, Cursor, Claude Code) to improve code quality, testing, refactoring, and development efficiency.
• Design and optimize data models, database schemas, and application performance using Entity Framework Core and SQL Server.
• Develop and maintain serverless solutions using Azure Functions or comparable technologies.
• Create responsive and user-friendly interfaces using Bootstrap or similar CSS frameworks.
• Translate business requirements into scalable, maintainable technical solutions within Agile development teams.
• Design, build, and support AI-enabled applications, agents, and intelligent workflows.
• Evaluate, implement, and optimize AI-augmented software development lifecycle (SDLC) practices.
• Develop and maintain automated testing solutions for UI, API, and database validation using Playwright and related technologies.
• Participate in sprint planning, code reviews, testing, CI/CD processes, and collaborative software delivery activities.
• Troubleshoot application, performance, and testing issues, including test reliability and automation framework improvements.
• Collaborate with cross-functional teams to deliver high-quality software and drive continuous improvement initiatives.

Core Development & SDLC:

• Experience with LLM architecture, prompt engineering, RAG, semantic search, vector databases, and agentic AI patterns
• Hands-on experience building AI agents or AI-enabled workflows for development, QA, performance testing, or security automation
• Strong knowledge of Azure AI Foundry, Azure OpenAI Service, and modern AI/ML frameworks
• Ability to design and optimize AI-augmented SDLC workflows with measurable efficiency gains
• Ability to build and incorporate AI-enabled, streamlined platform workflows
• Familiarity with AI-assisted documentation practices and the ability to evaluate AI-generated output, including awareness of model limitations and risks

Test Automation & Quality Engineering:

• Experience with test parallelization, test-data management, and flaky-test triage
• Preferred: proficiency with Playwright for UI, API, and database testing, including mocking
• Preferred: experience with performance-testing tools such as Artillery, JMeter, K6, or Locust
• Preferred: experience in a risk-based, automation-first engineering environment

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.