C#.Net Application Developer
Location: St. Charles, Illinois
Country: United States
Category: Software Development
Workplace Location: Onsite
Employment Type: Direct Hire/Perm
Posted Date: September 25, 2026
Job ID: 651202
Job Description
Location: Western Chicago (suburbs)
Schedule: Onsite initially; hybrid schedule after six months with two remote days per week
Role Type: Full-Time
Salary: $110,000-$130,000
The Planet Group has partnered with a Greater Chicago Area company to locate a Full Stack .NET Developer to join a small, collaborative development team supporting a well-established manufacturing business. You'll work on internal and customer-facing web applications, with an initial emphasis on backend development and data processing.
This is a hands-on role for someone who likes owning solutions from development through testing and production support. The team is small, so you'll have room to contribute ideas, learn the business, and see the impact of your work.
Responsibilities
- Build and enhance web applications using C# and .NET.
- Develop and maintain APIs, data integrations, and SQL-based solutions.
- Work across the application stack, including frontend features and backend data processing.
- Troubleshoot production issues and deliver fixes through testing and deployment.
- Partner with the team to design practical, end-to-end solutions for business and customer needs.
- Roughly 3-5 years of hands-on C# full stack development experience.
- Strong SQL skills and experience building or integrating APIs.
- Experience supporting production applications and testing your own work.
- Comfort working on a small team where developers take ownership across the application lifecycle.
- Entity Framework experience is preferred.
- Experience with application security, compliance, or data encryption is a plus.
- Manufacturing experience is preferred; financial applications experience is also relevant.
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EEO Statement
The staffing industry has seen an increase in people falsely representing themselves as recruiters to gather personal information from job seekers. For your safety, do not provide sensitive data to anyone you have not spoken with thoroughly, never provide banking information during the application process, and always double check the email address of the Recruiter to ensure it’s from an official Planet domain (@theplanetgroup.com or @launchcg.com) - and not a domain with an alternative extension like .net, .org, or .jobs.
The Planet Group and our companies are equal opportunity employers. It is our practice not to discriminate against any employee or applicant based on any criteria, condition or basis protected by laws or regulations in the locations where we do business. All qualified applicants are encouraged to apply. We celebrate diversity and are committed to providing an environment of mutual respect. We believe that diversity, equity, and inclusion enable us to better meet our mission and values while serving our clients across the globe. If you have a disability or handicap and would like us to accommodate you in any reasonable way, please inform your recruiter, or contact us, so that we can discuss the appropriate alternatives available.
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About The Planet Group
The Planet Group is a global professional services firm delivering strategic staffing and advisory solutions. We operate at the intersection of talent and transformation – connecting the right people with the right opportunities in the areas of technology, engineering, accounting & finance, digital marketing, and manufacturing.
As one of the largest staffing companies in the US, we operate with a global reach and a performance-first mindset. We partner with clients to move fast, stay agile, and drive measurable results – building high-impact teams that fuel transformation and growth.
