Flex; Project Sr. .NET Web App Developer

Duration: 8+ months

Start Date: ASAP

Slalom is a purpose-led, global business and technology consulting company. From strategy to implementation, our approach is fiercely human. In six+ countries and 43+ markets, we deeply understand our customers—and their customers—to deliver practical, end-to-end solutions that drive meaningful impact. Backed by close partnerships with over 400 leading technology providers, our 10,000+ strong team helps people and organizations dream bigger, move faster, and build better tomorrows for all.

We’re honored to be consistently recognized as a great place to work, including being one of Fortune’s 100 Best Companies to Work For seven years running. Learn more at

Slalom is seeking an experienced Senior .NET Cloud/Web Developer to support the redesign and modernization of a client website
. This is a contract engagement supporting a highly collaborative Agile team working within a modern Microsoft web and cloud ecosystem.

The ideal candidate is a strong backend-focused developer with deep .NET expertise, comfort working across the full stack when needed, and professional maturity to collaborate effectively with both technical and non-technical stakeholders.

You will join a 5-person Agile delivery team
, contributing primarily to backend development in a modern .NET and Blazor environment. The team follows a platform-first philosophy
, emphasizing Azure-native services and out-of-the-box capabilities over custom-built solutions.

While the platform includes Sitecore JSS (Headless), this role does not require CMS specialization. A dedicated Sitecore SME is already embedded in the team; your responsibility will be to extend the existing framework and integrate it into broader web solutions.

• Design, develop, and maintain clean, scalable backend code supporting the website redesign.
• Extend and enhance an existing Sitecore JSS (Headless) implementation in collaboration with a Sitecore specialist.
• Troubleshoot and resolve complex web application issues across the full stack, including CDN, identity, and third-party integrations.
• Participate actively in Agile ceremonies, including daily standups, backlog refinement, estimation, and story ownership.
• Collaborate closely with frontend developers, QA, and infrastructure resources to deliver high-quality solutions.
• Communicate technical progress, risks, and decisions clearly to both technical and non-technical stakeholders.
• Serve as a technical point of contact for stakeholders when leadership is unavailable.

• Backend & Web: .NET (v8, 9, 10), C#, Blazor
• CMS: Sitecore JSS (Headless)
• Methodology: Agile, co-owned stories, collaborative backlog

• Senior-level experience as a .NET Web or Cloud Developer delivering production-grade applications.
• Expert-level fluency in modern .NET (v8+), C#, and web application development.
• Hands-on experience troubleshooting full-stack web applications, including identity, security, and CDN layers.
• Familiarity with headless CMS patterns (Sitecore JSS experience preferred, but not required).
• Strong debugging skills and a pragmatic, platform-first development mindset.
• Ability to write clean, maintainable, and well-structured code with minimal oversight.
• Excellent communication skills and the ability to translate technical concepts for non-technical audiences.

• Experience working in Azure environments with a focus on low-code and managed services.
• Background working on high-visibility public websites or digital platforms.
• Comfortable operating with a high degree of autonomy and accountability.
• Quick learner who can ramp up efficiently within an active delivery team.

• Hybrid: 2 days per week onsite in Kirkland, WA preferred
• Remote: Considered for strong candidates if local availability is limited

Slalom prides itself on helping team members thrive in their work and life. As a result, Slalom is proud to invest in benefits that include meaningful time off and paid holidays, 401(k) with a match, a range of choices for highly subsidized health, dental, & vision coverage, adoption and fertility…