SIL Sr Full-Stack Developer

We are seeking a Full Stack Developer with a BackEnd Focus to support the design, development, and enhancement of enterprise web applications. This role emphasizes backend architecture, APIs, data access, and system integrations, while requiring handson fullstack capability to support endtoend solution delivery., * Design, build, and maintain backendcentric web applications using C#, .NET, and ASP.NET MVC.

• Develop and support RESTful APIs and Web Services that enable scalable integration across internal and thirdparty systems.
• Own backend components including business logic, data access layers, and integrations supporting enterprise web applications.
• Contribute to fullstack development by supporting frontend components as needed to deliver complete, endtoend solutions.
• Troubleshoot, debug, and optimize applications to ensure reliability, security, and performance.
• Collaborate with product owners, architects, UX, QA, and other engineers across the full software development lifecycle.
• Participate in design discussions, code reviews, and continuous improvement initiatives.

• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
• 3-7 years of experience as a fullstack application developer within a large, complex, enterprise environment.
• Strong handson experience designing and developing:

• C# and .NET (ASP.NET MVC) backend components and services
• REST APIs and Web APIs
• Integration services using JSON, XML, and related technologies

• Solid experience with Microsoft SQL Server, including relational database design, querying, and performance optimization.
• Proven understanding of ObjectOriented Design and backend architectural patterns.
• Working knowledge of frontend technologies including:

• JavaScript
• TypeScript
• HTML
• CSS
• CrossBrowser Development

• Experience using Visual Studio IDE and modern development and deployment workflows.

Additional Requirements

• Strong understanding of full web application architecture, from UI through data access layers, with a backendfirst mindset.
• Ability to balance backend system ownership with fullstack development responsibilities.
• Excellent problemsolving, collaboration, and communication skills.
• Authorization to work in the U.S. without current or future visa sponsorship is required.

Sonepar USA Inc life insurance, parental leave, paid time off, 401(k) United States, Colorado, Broomfield 1785 West 160th Avenue (Show on map) Jun 05, 2026

Sonepar Management Group (SMG) supports our Sonepar brands (i.e. operating companies) in the US through a shared services model. These services include, but are not limited to: human resources, finance, digital enterprise, supply chain, vendor relations, marketing, legal, and communications. The SMG teams enable our brands to do business in their local regions while taking advantage of the scale and collective resources of a global enterprise.

SMG fosters an inclusive and supportive culture. We offer leadership and development programs to help you reach your career goals. Our associates share in our collective achievements, and we firmly believe that Sonepar is "Powered by Difference." By driving technology and innovation, enabling paths to success, and caring about our people and their families, we have built a workplace where you can build a fulfilling career., * Healthcare plans

• Dental & vision

• Paid time off

• Paid parental leave

• 401(k) retirement savings with company match

• Professional and personal development programs

• Opportunity to become a shareholder

• Employer-paid short- and long-term disability

• Employer-paid life insurance for spouse and dependents

• Robust wellness program

• Gym reimbursement

• Employee Assistance Program (EAP)

We're proud to be a military-friendly company, and our many employee resource groups (ERGs) help you make connections and feel supported.