Senior / Lead .NET Developer

Corevia Staffing

Illinois

On-site

USD 110,000 - 160,000

Full time

8 days ago

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Job summary

Corevia Staffing in Lisle, IL is seeking a Senior/Lead .NET Developer for in-person collaboration. You will design, develop, test, deploy, and maintain enterprise applications using C#, ASP.NET, and related Microsoft technologies.

You will modernize legacy systems, build RESTful services, and contribute to CI/CD with Azure DevOps, GitHub, and TFS. Strong leadership and 10+ years of experience are expected.

Qualifications

10+ years of professional software development experience.
Strong experience with C#, .NET Framework, ASP.NET, ASP.NET Core, MVC, Web API, ADO.NET, Entity Framework, WCF.
Experience with SQL Server including query optimization, stored procedures, triggers, and performance tuning.
Front-end development using HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, React, JSON, and AJAX.

Responsibilities

Design, develop, test, deploy, and maintain enterprise apps using MS tech stack.
Modernize legacy .NET apps to improve performance, reliability, and UX.
Build and consume RESTful APIs and web services for internal/external integrations.

Skills

VB.NET

ASP.NET

ASP.NET Core

MVC

.NET Framework

LINQ

Entity Framework

REST

Web API

WCF

HTML5

CSS

Bootstrap

JavaScript

jQuery

Angular

React

AJAX

JSON

Azure DevOps

GitHub

TFS

Visual Studio

VS Code

Postman

SoapUI

SSMS

RESTful APIs

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, or related field

Tools

Azure DevOps

GitHub

TFS

Visual Studio

VS Code

Postman

SoapUI

SSMS

Job description

Senior / Lead .NET Developer P1 Lisle, IL (In-person interview) USC/GC/H1B

Key Responsibilities

Design, develop, test, deploy, and maintain enterprise applications using C#, ASP.NET, ASP.NET Core, MVC, Web API, and related Microsoft technologies. Modernize legacy .NET applications and services to improve performance, reliability, maintainability, and user experience. Build and consume RESTful APIs and web services to support integrations with internal and external systems. Develop responsive user interfaces using HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, and React where applicable. Create and optimize SQL queries, stored procedures, triggers, indexes, and database objects across SQL Server and other relational databases. Participate in requirements gathering, analysis, technical design, solution estimation, documentation, testing, and implementation activities. Support Agile delivery practices, including sprint planning, backlog refinement, code reviews, unit testing, and release coordination. Provide production support, troubleshoot application issues, analyze root causes, and implement corrective actions. Collaborate with business users, product owners, QA teams, infrastructure teams, and offshore/onshore development teams. Contribute to CI/CD pipelines, source control practices, build automation, and deployment processes using tools such as Azure DevOps, GitHub, and TFS.

Required Qualifications

10+ years of professional software development experience, preferably with significant hands‑on experience in the Microsoft technology stack. Strong experience with C#, .NET Framework, ASP.NET, ASP.NET Core, MVC, Web API, ADO.NET, Entity Framework, WCF, and related technologies. Experience developing and supporting N-tier, client/server, web-based, and service-oriented applications. Strong database development skills with SQL Server, including query optimization, stored procedures, triggers, and performance tuning. Experience with front-end development using HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, React, JSON, and AJAX. Working knowledge of object-oriented programming principles, SOLID principles, design patterns, and clean coding practices. Experience with source control, DevOps, and delivery tools such as Azure DevOps, GitHub, TFS, Visual Studio, VS Code, Postman, and SoapUI. Ability to create technical design documents, use cases, test cases, deployment documentation, and user-facing documentation. Strong analytical, troubleshooting, communication, and stakeholder-management skills.

Preferred Qualifications

Experience leading small development teams or coordinating work between onshore and offshore teams. Experience with application modernization, legacy system remediation, technical debt reduction, and platform upgrades. Experience integrating third‑party services, AI‑enabled services, transcript/document processing, or business workflow automation. Experience in manufacturing, automotive, legal technology, industrial, or enterprise business systems environments. Familiarity with Oracle, DB2, LiteDB, PostgreSQL, SharePoint, IIS, Windows Server, and cloud‑oriented delivery practices.

Education and Certifications

Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field preferred; equivalent professional experience may be considered. Advanced degree or formal computer applications education is a plus. Relevant Microsoft, .NET, cloud, DevOps, database, or application development certifications are preferred.

Technical Skill Areas

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