Senior Platform Engineer - Microsoft Power Platform & SharePoint Online

Avacone; Greater London; On-site; GBP 85,000 - 120,000; Full time

Job summary

Avacone is seeking an experienced Senior Platform Engineer to manage, govern, and continuously improve Microsoft Power Platform and SharePoint Online, alongside core Microsoft 365 services.

You will combine hands-on platform operations with governance, security, and the platform operating model, collaborating with developers and business users to deliver reliable services, establish clear standards, and migrate legacy solutions.

Qualifications

• Extensive hands-on experience configuring and governing Power Platform and Dataverse.
• Proven ability to implement governance and COE for adoption and monitoring.
• Strong SharePoint Online design, permissions, information architecture, and migration.
• Experience migrating legacy workflows to Power Automate.
• Solid knowledge of Microsoft 365 security, IAM and data protection.
• Ability to produce clear designs and documentation for teams.

Responsibilities

• Manage daily operations for Power Platform, SharePoint Online, OneDrive for Business, Teams, and Exchange Online.
• Establish governance through the Centre of Excellence with environments, policies, templates, inventory, and adoption.
• Define and maintain the platform’s target operating model including roles, processes, controls, and support.
• Lead platform security design including IAM, data protection, and data loss prevention with Purview where suitable.
• Collaborate with developers to establish engineering standards and promote best practices.
• Plan SharePoint migrations to SharePoint Online and migrate legacy workflows to Power Automate.
• Coach developers and business users on reusable components and maintainable design.
• Drive automation and continuous service improvement with clear designs and procedures.

Skills

Power Platform

Power Apps

Power Automate

Dataverse

SharePoint Online

Governance

Security

Microsoft Purview

Job description

Role overview

We are seeking an experienced Senior Platform Engineer to manage, govern, and continuously improve Microsoft Power Platform and SharePoint Online, alongside core Microsoft 365 services.

The role combines hands-on platform operations with responsibility for governance, security, and the platform operating model. You will work closely with developers, business users, and stakeholders to deliver reliable services, establish clear standards, and support the migration of legacy solutions.

Key responsibilities

• Manage daily operations for Power Platform, SharePoint Online, OneDrive for Business, Teams, and Exchange Online, including monitoring, incident resolution, service requests, updates, and access management.
• Establish and maintain Power Platform governance through the Centre of Excellence, covering environments, policies, templates, inventory, monitoring, and adoption.
• Define and maintain the platform’s target operating model, including roles, processes, controls, and support arrangements.
• Lead platform security design, including permissions, identity and access controls, data protection, and data loss prevention, in line with BIS standards. Apply Microsoft Purview capabilities where appropriate.
• Collaborate with developers to establish engineering standards, review solutions, and promote effective development, testing, and release practices.
• Plan and deliver SharePoint site migrations to SharePoint Online and migrate legacy workflows to Power Automate, ensuring clear stakeholder communication and minimal business disruption.
• Coach developers and business users on reusable components, naming conventions, testing, and maintainable solution design.
• Drive automation and continuous service improvement, maintaining clear technical designs, operational procedures, and support documentation.

Requirements

Required skills and experience

• Strong hands-on experience configuring, governing, and operating Microsoft Power Platform, including Power Apps, Power Automate, and Dataverse.
• Practical experience implementing and using the Power Platform Centre of Excellence for governance, monitoring, and adoption.
• Strong SharePoint and SharePoint Online expertise, including site design, permissions, information architecture, and migration.
• Experience migrating legacy workflows to Power Automate.
• Solid experience supporting day-to-day Microsoft 365 operations across SharePoint Online, OneDrive for Business, Teams, and Exchange Online.
• Strong understanding of Microsoft 365 security and compliance, including identity and access management, data protection, retention, and data loss prevention.
• Experience applying Microsoft Purview capabilities where required.
• Ability to produce clear, practical designs and documentation that other teams can maintain and support.
• Strong communication, stakeholder management, and coaching skills.
• A collaborative, organised approach, with the ability to work independently in a diverse, multicultural environment.