Senior .NET Engineer — Full-Stack & Azure Leader

RarefiedIT; King of Prussia (PA); Hybrid; USD 120,000 - 170,000; Full time

Job summary

RarefiedIT in King of Prussia, PA is seeking a Senior .NET Developer to drive enterprise-grade solutions and mentor a development team. The role requires hands-on expertise in .NET Core, C#, Web API, and modern frontend tech like React.

You will modernize legacy systems, design scalable architectures, and lead cloud-native implementations. The ideal candidate has 12+ years of full-stack experience, strong collaboration skills, and a track record of delivering secure, scalable web applications in

Qualifications

• 12+ years of professional software development experience.
• Strong hands-on with .NET Core / ASP.NET Core, C#, and Web API development.
• Proficiency in React.js, JavaScript (ES6+), HTML5, and CSS3.

Responsibilities

• Drive enterprise-grade .NET solutions from concept to deployment, providing technical leadership and mentoring in a fast-paced Agile environment
• Design, development, and delivery of scalable .NET applications while guiding a development team and ensuring adherence to coding standards and architectural best practices.
• Modernize legacy systems by migrating applications from .NET Framework to .NET Core, aligning with modern design and cloud practices.
• Oversee full-stack development using .NET Core and Angular/React, ensuring high-performance web applications and seamless integration across layers
• Lead the development of secure, cloud-native applications using .NET Core and Azure, while ensuring CI/CD and DevOps best practices.
• Lead database solution design and implementation with MS SQL, including complex query and stored procedure development.
• Oversee ETL process development and deployment using SSIS.
• Implement reporting solutions using SSRS to meet organizational requirements.
• Provide technical leadership, mentorship, and conduct code reviews to ensure adherence to architectural standards and best practices.

Skills

Full Stack Developer

React.js

JavaScript ES6+

HTML5

CSS3

C#

NET Core

ASP.NET Core

Web API

SQL Server

OOP

Design Patterns

RESTful services

Microservices

Azure

AWS

CI/CD

Git

Tools

SSIS

SSRS

Job description

RarefiedIT in King of Prussia, PA is seeking a Senior .NET Developer to drive enterprise-grade solutions and mentor a development team. The role requires hands-on expertise in .NET Core, C#, Web API, and modern frontend tech like React.

You will modernize legacy systems, design scalable architectures, and lead cloud-native implementations. The ideal candidate has 12+ years of full-stack experience, strong collaboration skills, and a track record of delivering secure, scalable web applications in