Senior / Lead .NET Developer

American IT Systems

Lisle, IL, United States

8 days ago

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Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Experience level

Expert

Experience required

10 years minimum

Working hours

Regular working hours

Job source

www.careerjet.com

Tech stack

Clean Code Principles ASP.NET JavaScript (Programming Language) .NET Framework Multitier Architecture ADO.NET Agile Methodology Artificial Intelligence Ajax (Programming Language) Software Applications HTML5 Build Automation

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Job description

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., C#, VB.NET, ASP.NET, ASP.NET Core, MVC, .NET Framework, LINQ, Entity Framework APIs and Services REST, SOAP, Web API, WCF, backend services, third-party integrations Front-End HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, React, AJAX, JSON Databases SQL Server, Oracle, DB2, PostgreSQL, LiteDB, stored procedures, triggers, query optimization DevOps and Tools Azure DevOps, GitHub, TFS, Visual Studio, VS Code, Postman, SoapUI, SSMS Delivery Practices Agile, Waterfall, CI/CD, code reviews, testing, production support, technical documentation

Requirements

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., * 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.