.NET Software Developer

Quantum Technologies. LLC; Wilmington (DE); On-site; USD 90,000 - 130,000; Full time

Job summary

Quantum Technologies LLC is seeking skilled .NET Software Developers to join our customer’s engineering team. You will design, build, and maintain robust solutions for the Global Trust and Agency domain, collaborating across cross-functional teams and leveraging AI-assisted tools to enhance code quality and development efficiency.

You will design scalable data models with EF Core and SQL Server, build serverless solutions with Azure Functions, and create responsive user interfaces with

Qualifications

• Strong OOP fundamentals and maintainable, scalable code.
• Experience with EF Core data modeling and migrations, plus performance optimization.
• Proficiency in SQL Server, scripting, indexing, and query tuning.
• Experience building scalable apps with C# and .NET Core.
• Frontend framework experience (Blazor/React/Angular/Vue).
• Proficiency in JavaScript/TypeScript for web apps.
• Experience using AI-assisted development tools for code generation, testing, and review.
• Hands-on with Azure Functions or similar serverless tech.
• Proficiency in responsive UI with Bootstrap.
• Familiarity with Git, CI/CD pipelines and collaborative workflows.
• Experience in Agile/Scrum environments.

Responsibilities

• Design, develop, and maintain scalable .NET applications.
• Build modern web apps using Blazor Server/Blazor WebAssembly.
• Leverage AI-assisted development tools to improve code quality and efficiency.
• Design and optimize data models, schemas, and performance using EF Core and SQL Server.
• Develop and maintain serverless solutions with Azure Functions.
• Create responsive UIs using Bootstrap or similar frameworks.
• Translate business needs into scalable technical solutions within Agile teams.
• Design and support AI-enabled applications and intelligent workflows.
• Evaluate and optimize AI-augmented SDLC practices.
• Develop automated testing solutions for UI, API, and database validation using Playwright.
• Participate in sprint planning, reviews, CI/CD, and delivery activities.
• Troubleshoot performance, test reliability, and automation framework improvements.
• Collaborate with cross-functional teams to drive quality improvements.

Skills

OOP principles

Entity Framework Core

SQL Server

C#/.NET Core

Front-end frameworks

Blazor

JavaScript/TypeScript

AI-assisted tools

Azure Functions

Bootstrap UI

Git & CI/CD

Agile/Scrum

MediatR

Polly

Docker

Kubernetes

Tools

Azure Functions

Docker

Kubernetes

Playwright

Git

Job description

We are seeking skilled .NET Software Developers to join our customer’s engineering team. In these roles, you will design, build, and maintain robust solutions for our customer’s Global Trust and Agency business domain. The ideal candidate brings strong .NET expertise, a commitment to code quality, and the ability to collaborate effectively across cross-functional teams.

Global Trust and Agency provide trustee, agency, and fiduciary services across structured finance, debt capital markets, and corporate trust transactions worldwide. This role supports development of a global platform within the Global Trust and Agency domain enabling our customer’s global operations.

Some of the things you’ll be doing:

• 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.

What technical skills, experience and qualifications do you need? Core Development & SDLC:

• Strong grounding in OOP principles and developing high-quality, maintainable, scalable code Strong understanding of data modeling, migrations, LINQ, and performance optimization with Entity Framework Core
• Proficiency in SQL Server, including scripting, execution-plan analysis, indexing, and query tuning
• Experience building scalable, modular applications with C# and .NET Core
• Proficiency in at least one modern front-end framework for building responsive, interactive web applications (e.g., Blazor, React, Angular, or Vue)
• Proficiency with JavaScript and/or TypeScript for modern web application development
• Practical use of AI-assisted development tools such as GitHub Copilot, Cursor, or Claude Code for code generation, refactoring, testing, and review
• Hands-on experience with Azure Functions or comparable serverless technologies
• Proficiency in responsive UI development using Bootstrap or similar CSS frameworks
• Familiarity with Git, CI/CD pipelines, and collaborative development workflows
• Experience working in Agile/Scrum environments and delivering moderate- to high-complexity work within sprint cycles
• Preferred: familiarity with MediatR, Clean Architecture, Fluxor (or similar state-management libraries), and resilience patterns such as Polly
• Preferred: experience with containers and orchestration technologies such as Docker and Kubernetes

AI & Intelligent Systems:

• 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.