Software Developer

Job Full Description

Software Developer (Full Stack - .NET)

Location: Bannockburn, IL (Onsite with hybrid potential after 90 days)

Employment Type: Evaluation-to-Hire

Salary Range: $95,000 - $105,000 (based on experience)

We are seeking a motivated and versatile Full Stack Software Developer to join our clients' Internal Applications team. This role is ideal for someone who thrives in both maintaining legacy systems and contributing to modern platform development.

You will play a key role in supporting and enhancing their existing e-commerce platform while helping design and build a next-generation, headless commerce solution. This position offers a unique opportunity to work across a wide technology stack in a collaborative and fast-paced environment.

Responsibilities:

E-Commerce Platform

Maintain, troubleshoot, and enhance the current e-commerce platform (C#, ASP.NET, XSLT, skins/templates)

Develop new functionality and integrations

Support and improve custom product configurator (KitBuilder)

Participate in planning and building a modern, headless e-commerce platform

Software Development

Design and develop responsive web applications aligned with business needs

Collaborate with stakeholders to translate business requirements into technical solutions

Work cross-functionally with integration developers and designers

Ensure consistency in UI/UX and branding across applications

Integrations & Systems

Build and maintain integrations with third-party systems (ERP, WMS, APIs, payment gateways)

Participate in architecture and system design discussions

Create and maintain technical documentation

Support & Training

Diagnose and resolve application issues for end users

Provide documentation and training to support system adoption

Qualifications:

Bachelor's degree in Computer Science or related field

3+ years of software development experience

Strong experience working in C# and .NET environments (REQUIRED)

Ability to work within and maintain legacy systems without full rewrites

Strong analytical, problem-solving, and communication skills

Self-starter with the ability to learn new systems independently

Required Technical Skills:

Backend

C#, ASP.NET (MVC & Web Forms)

REST API development and integration

Service-Oriented Architecture (SOA)

VB.NET (nice to have)

Frontend

HTML, CSS, JavaScript (REQUIRED)

jQuery, AJAX, Bootstrap

Experience with modern frameworks (React, Vue, Next.js) is a plus

Database

SQL Server (queries, stored procedures, performance tuning)

Tools & Practices

Visual Studio, Git, Azure DevOps

Agile development methodologies

CI/CD pipelines and debugging practices

Preferred Experience (Nice-to-Haves)

ERP integration experience (NetSuite preferred)

E-commerce platforms (Shopify Plus, BigCommerce, Commercetools)

XSLT/XML experience

Product configurators (KitBuilder or similar)

Middleware/integration tools (Boomi)

Warehouse Management System (WMS) integrations

Telerik UI components

Exposure to AI or automation workflows (Agentic AI)

Role Breakdown

75% Legacy system maintenance and enhancements

25% Modern platform development (headless commerce initiative)

About Express Employment Professionals: Work with a locally owned staffing company that partners with companies in Lake County, IL to hire long term talent. Express has over 800+ locations nationwide and 22 in the Chicago-land area. Check out our Libertyville Team www.expresspros.com/libertyvilleil and our Google Reviews https://g.co/kgs/qEqco2

TO APPLY- Email resume to

Libertyville, IL

2377

836 South Milwaukee Avenue

Libertyville, IL 60048