.Net Developer

Stellent IT LLC; Lisle (IL); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Stellent IT LLC is seeking a .NET Developer in Lisle, IL, with ~5+ years of experience to support a Dealer Management Systems Integration initiative. The role involves developing with C#, ASP.NET, and .NET Core, plus frontend work with ReactJS and JavaScript, and API development for system integration.

You will work with senior developers and product owners in an Agile environment, contributing to enhancements, maintenance, testing, and modernization across the software lifecycle while

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or a related technical field.
• 5+ years of professional, internship, co-op, or equivalent project experience with .NET development.

Responsibilities

• Must have experience with C#, ASP.NET, .NET Core or related OOP concepts.
• Hands-on exposure to frontend development concepts (ReactJS, JavaScript, HTML, CSS).
• Create, consume, test, and support Web APIs using .NET Core.
• Unit testing, API testing, debugging, and code validation practices.
• Exposure to security, performance, and maintainability considerations in app development.
• Contribute to enhancements, maintenance, and modernization of existing web apps.
• Familiarity with HTML, XML, CSS, JSON, JavaScript, and jQuery.
• Basic SQL queries and relational data troubleshooting.
• REST API design, service integrations, and authentication concepts.

Skills

C#

ASP.NET

.NET Core

ReactJS

JavaScript

HTML

CSS

SQL

REST API

SOAP

Git

Azure DevOps

CI/CD

Agile

Education

Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related technical field

Tools

Git

Azure DevOps

JIRA

Job description

Position: .Net Developer

Location: Lisle, IL - this position is 4x a week onsite

Interview: 1 remote and the other onsite

Contract length: 12 month contract to hire

Must be w2

must have two professional references.

We are looking for a .NET developer with approximately 5+ years of professional, internship, co-op, or equivalent project experience to support our Dealer Management Systems Integration team initiative. This role is ideal for an early-career developer who has hands‑on exposure to application development, API creation, and system integration, and is ready to continue growing technical skills in a collaborative Agile environment. The selected candidate will work with senior developers, product owners, and team leads while contributing to enhancements, maintenance, testing, API development, integration support, and modernization efforts across the software development lifecycle.

Responsibilities include:

• Must have experience with C#, ASP.NET, .NET Core, or related object‑oriented programming concepts through professional work, internship, co‑op, academic, or project‑based experience
• Hands‑on exposure to front‑end development concepts, including ReactJS, JavaScript, HTML, CSS, or similar technologies
• Basic experience creating, consuming, testing, and supporting Web APIs using .NET Core or similar frameworks
• Exposure to unit testing, API testing, debugging, and code validation practices
• Basic awareness of security, performance, scalability, and maintainability considerations in application development
• Contribute to enhancements, maintenance, and modernization efforts for existing web applications with guidance from experienced team members
• Basic familiarity with HTML, XML, CSS, JSON, JavaScript, and jQuery
• Basic SQL experience, including writing simple queries, understanding relational database concepts, and supporting data‑related troubleshooting
• Exposure to REST API design, service integrations, request/response handling, JSON payloads, authentication concepts, and troubleshooting API connectivity issues; familiarity with SOAP services is a plus
• Assist with integrating internal and external systems by supporting API endpoints, data mapping, error handling, logging, and coordination with consuming applications
• Basic understanding of object‑oriented programming principles
• Familiarity with source control concepts, including Git, branching, pull requests, and code reviews
• Interest in learning cloud, containerization, and deployment concepts such as Azure, Kubernetes, or CI/CD pipelines
• Awareness of software design principles such as SOLID, clean code, and reusable components
• Support code refactoring, defect resolution, and small feature development in alignment with team standards
• Familiarity with Agile tools such as Azure DevOps, ADO, or JIRA
• Participate in Agile ceremonies, sprint planning, daily stand‑ups, backlog refinement, and retrospectives
• Follow team development standards, deployment processes, documentation practices, and technical best practices
• Demonstrate curiosity, accountability, and a continuous learning mindset
• Communicate effectively with developers, product owners, business partners, and quality assurance team members
• Experience with personal, academic, internship, or open‑source software projects is a plus
• Ability to work independently on assigned tasks while collaborating closely with a team

Education Requirements:

• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or a related technical field