SIL Sr Full-Stack Developer

We are seeking a Full Stack Developer with a Back‑End 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 hands‑on full‑stack capability to support end‑to‑end solution delivery.

This role is located in Broomfield, Colorado on a hybrid schedule.

• Design, build, and maintain backend‑centric web applications using C#, .NET, and ASP.NET MVC.
• Develop and support RESTful APIs and Web Services that enable scalable integration across internal and third‑party systems.
• Own backend components including business logic, data access layers, and integrations supporting enterprise web applications.
• Contribute to full‑stack development by supporting front‑end components as needed to deliver complete, end‑to‑end 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.

Required

• Bachelor’s degree in Computer Science or a related field, or equivalent practical experience.
• 3–7 years of experience as a full‑stack application developer within a large, complex, enterprise environment.
• Strong hands‑on 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 Object‑Oriented Design and backend architectural patterns.
• Working knowledge of front‑end technologies including:
  • Java Script
  • Type Script
  • HTML
  • CSS
  • Cross‑Browser Development
• Experience using Visual Studio IDE and modern development and deployment workflows.

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

• 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)

Sonepar is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, or any other categories protected by federal, state or local law.

Sonepar and our family of brands are committed to the full inclusion of all qualified individuals. In keeping with our commitment, we will take the steps to assure that people with disabilities are provided reasonable accommodations. Accordingly, if a reasonable accommodation is required to fully participate in the job application or interview process, to perform the essential functions of the position, and/or to receive all other benefits and privileges of employment, please call  or email