Sitecore Solution Architect (XM Cloud)

About the role

Arcsen, a global technology consulting firm serving EMEA clients, is looking for a Sitecore Solution Architect to own the end-to-end architecture of a large, multi-market Digital Experience Platform built on Sitecore XM Cloud. You will define the structure of the public website, multi-country microsites, member/loyalty portal and mobile content backbone, and design the integration contract between Sitecore and the enterprise CRM. As the first hire on the team, you will set the standards for the Sitecore practice.

Key responsibilities

• Define the Sitecore XM Cloud architecture: rendering host strategy, content modelling, multi-site and multi-market structure (tens of points of sale), and environment strategy across non-production and production environments.
• Design a bi-directional, governed API contract between Sitecore and the CRM via the enterprise integration layer, covering inbound leads and behavioural events, case creation and outbound personalisation tokens, with no point-to-point integrations.
• Architect single sign-on across Sitecore admin and the CRM using Azure AD.
• Define the personalisation architecture, with audience segments activated from the customer data platform into Sitecore for real-time decisioning.
• Set non-functional requirements: page load under 2s on desktop and 3s on mobile, API p95 under 200ms, support for 50,000+ concurrent users and 1,000+ transactions per second.
• Own the CI/CD architecture (Sitecore CLI, Azure DevOps / Git) and a branching strategy aligned to client IT governance.
• Produce solution design documents, sequence diagrams and integration specifications; lead architecture reviews and design-authority sessions.
• Work with the Sitecore vendor's advisory services and the client's IT governance, and mentor developers while setting coding, security and documentation standards.

Required profile

• Bachelor's degree in Computer Science, Information Technology or a related field.
• 8+ years of Sitecore experience, including 2+ years on Sitecore XM Cloud or composable / headless Sitecore in production.
• Proven track record architecting enterprise multi-site, multi-language Sitecore solutions.
• Strong integration architecture experience and single sign-on / identity federation experience.
• Excellent written and verbal English, able to lead client-facing design sessions.

Required skills

• REST APIs, webhooks, event-driven patterns and an enterprise integration layer (MuleSoft strongly preferred).
• .NET / C# and modern front-end rendering (Next.js / React).
• CI/CD and DevOps for Sitecore (Sitecore CLI, Azure DevOps).

What we offer

• Hands-on experience with real-world projects and clients.
• Collaborative and supportive work environment.
• Career growth opportunities.