Senior SharePoint Developer DGH Recruitment are currently recruiting on behalf of a leading client in the Professional Services industry who require a Senior SharePoint Developer to join the firm in London. You will design, develop, administer, and modernize their SharePoint environments across on-premise and cloud platforms, combining hands-on custom development with enterprise platform administration, including system maintenance, updates, patching, governance, and intranet design. Responsibilities: * Define and own the SharePoint architecture roadmap across SharePoint SE and SharePoint Online. * Lead modernization initiatives moving classic SharePoint experiences to modern SharePoint. * Design and develop enterprise-scale solutions using SPFx, React, TypeScript, JavaScript, Microsoft Graph APIs, and REST APIs. * Design and maintain enterprise on-premise and cloud SharePoint platforms, including site architecture, navigation, branding, and content structure. * Administer SharePoint SE (on-prem) and SharePoint Online tenants: service applications, web applications, site collections, site topology, permissions, authentication, and governance policies. * Own the end-to-end support model for SharePoint platforms and custom solutions. * Perform regular system updates, cumulative updates, patches, and service packs to maintain platform stability, security, and compliance. * Monitor environments for performance, availability, capacity, and reliability; manage storage quotas and site lifecycle. Required Skills: * Extensive hands-on experience administering and developing solutions for SharePoint Subscription Edition (SE) and SharePoint Online. * Proven expertise in SharePoint Framework (SPFx) development. * Proficiency in TypeScript, JavaScript, React, HTML5, CSS3, and modern front-end development practices. * Strong experience integrating SharePoint solutions using RESTful APIs and Microsoft Graph. * Solid experience with C# and .NET Framework for backend and integration development. * Hands-on experience administering SharePoint on-prem environments, including patching, upgrades, performance tuning, and troubleshooting. * Strong experience with SQL Server design, development, and optimization. Senior SharePoint Developer In accordance with the Employment Agencies and Employment Businesses Regulations 2003, this position is advertised based upon DGH Recruitment Limited having first sought approval of its client to find candidates for this position. DGH Recruitment Limited acts as both an Employment Agency and Employment Business