Senior SiteCore Developer

The Firm: Arcsen is a leading global technology consulting firm specializing in providing innovative solutions and expert guidance to businesses across EMEA. With a commitment to excellence, Arcsen partners with industry giants such as Salesforce, MuleSoft, Tableau, Slack, and Sprout, Certinia, and Splunk, ensuring clients receive top-tier services tailored to their unique needs. Position Overview: We need Senior Sitecore Developers to build the headless Sitecore solution that powers a large multi-market website, member portal and the content layer behind native mobile apps. You will build components, templates and the integration handlers that connect Sitecore to our enterprise CRM through an integration layer. You will set patterns the wider build team follows. Key Responsibilities: Develop Sitecore XM Cloud components, renderings, templates and serialized items — up to roughly 200 page templates and variants across the programme. Build and consume Experience / Edge APIs that expose personalisation tokens (tier, segment, next-best-offer, active campaign) to the front-end and to mobile. Implement inbound and outbound integration handlers to the enterprise integration layer: lead and subscription capture, behavioural events to the customer data platform, self-service case submission, and member-action events. Implement Sitecore-native search and personalisation surfaces (homepage hero, offers, content blocks). Build a source-controlled solution with Sitecore CLI serialization and contribute to the CI/CD pipeline. Write fully commented, documented code; participate in code review and uphold security and performance standards. Support content migration and integration testing through to go-live and hypercare.