Senior SharePoint Developer and Administrator

Senior SharePoint Developer & Administrator

Location: London
Employment Type: Permanent

I am working with a leading international professional services firm that is seeking a talented Senior SharePoint Developer & Administrator to join its London technology team. This is an excellent opportunity to take ownership of modernising and enhancing enterprise SharePoint environments across both SharePoint Subscription Edition (SE) and SharePoint Online, while playing a key role in the evolution of the firm's collaboration and intranet platforms.

This role offers a blend of hands‑on development, enterprise platform administration, and technical leadership, with the scope to influence architecture, governance, and best practice across a global organisation.

• Design, develop and maintain custom solutions across SharePoint SE and SharePoint Online.
• Lead migration from SharePoint 2016 to SE/Online, including rewriting legacy web parts using SPFx.
• Build custom SPFx web parts, extensions and integrations using Type Script, JavaScript, React, HTML/CSS, and REST APIs.
• Develop and maintain SharePoint Online intranet structures including architecture, navigation, branding, and content design.
• Integrate SharePoint with internal systems and third‑party platforms using RESTful APIs and Microsoft Graph.

• Administer both SharePoint SE (on‑prem) and SharePoint Online environments.
• Manage updates, cumulative patches and platform maintenance.
• Monitor performance, availability, capacity and reliability.
• Oversee site collections, permissions, authentication, service applications and governance.
• Support backup, restore and disaster recovery processes.
• Troubleshoot complex cloud and on‑prem SharePoint issues.

• Configure Business Connectivity Services (BCS) and create External Content Types (ECTs).
• Connect SharePoint to external SQL Server data and web services.
• Build scripts and front‑end components interacting with BCS data using JavaScript/REST.
• Ensure secure, reliable and well‑governed data integrations.

• Provide guidance and mentorship to junior developers and administrators.
• Collaborate with project managers, business analysts and stakeholders to deliver high‑quality solutions.
• Produce and maintain documentation including architecture diagrams, runbooks and migration guides.
• Recommend improvements to governance, architecture and development standards.

• Extensive hands‑on experience with SharePoint SE and SharePoint Online development and administration.
• Strong background migrating SharePoint 2016 to SE/Online.
• Proven SPFx development skills.
• Proficiency in Type Script, JavaScript, React, HTML5, CSS
  3.
• Strong REST API and Microsoft Graph integration experience.
• Solid C#/.NET framework experience.
• Deep knowledge of SharePoint on‑prem administration, performance tuning, patching and troubleshooting.
• Experience with BCS and creating External Content Types.
• Strong SQL Server skills.
• Understanding of authentication, permissions, governance and security best practices.
• Excellent communication and analytical skills.
• Experience building or supporting large‑scale SharePoint Online intranet platforms.
• Familiarity with Microsoft Power Platform (Power Apps, Power Automate).
• Experience with Azure AD, Azure Functions or App Services.
• Relevant Microsoft certifications.

• Stable and secure SharePoint SE and SharePoint Online environments.
• Successful migration of legacy SharePoint 2016 solutions.
• Modern, user‑friendly SharePoint Online intranet with meaningful customisations.
• Strong governance, clear documentation and scalable operational processes.

If you're a Senior SharePoint specialist looking to lead impactful modernisation work within a global, forward‑thinking firm, I'd love to connect for a confidential conversation.

Due to the high volume of applications, we are not able to respond to all enquiries. If you have not received a response within 72 hours, please assume you have not been shortlisted at this stage, however thank you for taking the time to apply.