Senior full stack developer (.net – Chicago)
Location: Chicago, Illinois
Country: United States
Category: Software Development
Workplace Location: Onsite
Employment Type: Contract
Posted Date: June 19, 2026
Job ID: 645763
Job Description
The Planet Group has partnered with a Chicago, IL area company to locate Senior Full-Stack Developer for a contract role. This role is integral to delivering innovative solutions that enhance efficiency and elevate the customer experience. Collaborating with cross-functional teams, you will drive application enhancements while ensuring service reliability and performance that our team members rely on.
Please note, this is a HYBRID role. You must be willing to go onsite 2-3 days a week. Candidates will be screened thoroughly.
Please also note, all candidates will be asked to complete a technical assessment for this role.
Key Responsibilities
- Design and develop scalable web applications using Angular and C#.
- Build and maintain a reusable UI component library.
- Develop and implement RESTful APIs using C# and .NET Core.
- Utilize Entity Framework Core for efficient data management.
- Write clean, well-documented, and maintainable code.
- Collaborate with cross-functional teams to define technical requirements and solutions.
- Conduct unit and integration testing to ensure high-quality code.
- Troubleshoot and resolve technical issues to maintain application reliability.
- Stay updated with emerging technologies and industry trends.
Qualifications & Experience
- 5+ years of experience in application design and development.
- Ability to adapt to evolving business needs and new technologies.
- Strong proficiency in Angular, JavaScript, TypeScript, and HTML5/CSS3.
- Implement CI/CD pipelines, version control, and automated testing using Azure DevOps
- Expertise in C# and .NET Core.
- Experience with Entity Framework Core.
- Solid understanding of RESTful API development.
- Familiarity with SQL and database concepts.
- Experience with unit testing frameworks (Jest, NUnit, xUnit).
- Proficiency with Git and version control best practices.
- Understanding of Agile methodologies (Scrum, Kanban).
- Strong problem-solving and analytical skills.
- Excellent communication and collaboration abilities
#LI-SC1
#HYBRID
#TECH
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.