Senior .NET Developer - React & Web API Expert

ZENITH INFOTEK LLC; Lisle (IL); On-site; USD 110,000 - 150,000; Full time

Job summary

Zenith Infotek LLC is seeking a skilled .NET Developer to help advance our CSE product initiative in Lisle, IL. The role emphasizes ASP.NET Core, ReactJS, Web APIs, and SQL expertise in a fast-paced, Agile team.

You will modernize legacy applications, ensure secure, scalable solutions, and collaborate across disciplines. Proficiency with HTML/JS/CSS, REST/SOAP services, and CI/CD pipelines is essential.

Qualifications

• 6+ years with ASP.NET / .NET Core using C# in Visual Studio
• 6+ years with ReactJS and Web API development in .NET Core
• Strong SQL skills including complex queries and stored procedures; SOAP/REST services
• Experience with CI/CD, GitFlow, Git/TFS, Azure and Kubernetes

Responsibilities

• Contribute to the Commercial Sales Experience (CSE) product initiative
• Develop using ASP.NET / .NET Core and ReactJS within an Agile framework
• Build Web APIs in .NET Core and write extensive unit tests
• Focus on security, performance, and scalability of applications
• Modernize legacy ASP.NET Web Forms to .NET Core + React and deploy to Kubernetes
• Collaborate with teammates; understand HTML, XML, CSS, JSON, JavaScript & jQuery

Skills

ReactJS

ASP.NET Core

C#

Web API development

Unit testing

Security

Performance

OOP principles

SOLID design

Design patterns

CI/CD

Azure

Git

TFS

Kubernetes

Agile

SOAP/REST services

VS IDE

GitFlow

Tools

Visual Studio IDE

Git

TFS

JIRA

Kubernetes

Azure

Job description

Zenith Infotek LLC is seeking a skilled .NET Developer to help advance our CSE product initiative in Lisle, IL. The role emphasizes ASP.NET Core, ReactJS, Web APIs, and SQL expertise in a fast-paced, Agile team.

You will modernize legacy applications, ensure secure, scalable solutions, and collaborate across disciplines. Proficiency with HTML/JS/CSS, REST/SOAP services, and CI/CD pipelines is essential.