Software Developer; Full Stack – .NET
Job in
Deerfield, Lake County, Illinois, 60015, USA
Listed on 2026-09-03
Listing for:
Express Employment Professionals
Full Time
position Listed on 2026-09-03
Job specializations:
-
Software Development
Full Stack Developer, .NET Developer, Backend Developer, SQL Developer
Job Description & How to Apply Below
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 client's 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.
ResponsibilitiesE-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 (Kit Builder)
- Participate in planning and building a modern, headless e-commerce platform
- 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
- 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
- Diagnose and resolve application issues for end users
- Provide documentation and training to support system adoption
- Bachelor's degree in Computer Science or related field
- 3+ years of software development experience
- Strong experience working in C# 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
- C#, ASP.NET (MVC & Web Forms)
- REST API development and integration
- Service-Oriented Architecture (SOA)
- (nice to have)
- HTML, CSS, JavaScript (REQUIRED)
- jQuery, AJAX, Bootstrap
- Experience with modern frameworks (React, Vue, Next.js) is a plus
- SQL Server (queries, stored procedures, performance tuning)
- Visual Studio, Git, Azure Dev Ops
- Agile development methodologies
- CI/CD pipelines and debugging practices
- 75% Legacy system maintenance and enhancements
- 25% Modern platform development (headless commerce initiative)
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