Senior Microsoft 365 Engineer

About the role

The Global Enterprise Clients team at Optiver owns the Microsoft 365 platform, which is critical production infrastructure for the entire worldwide workforce.

Responsibilities

• Set direction and design standards for the global Microsoft 365 platform across collaboration, messaging, identity, and device access.
• Lead architectural decisions end-to-end, including design, peer validation, and implementation, driving change from inception through global rollout and adoption.
• Drive systemic simplification, reducing legacy patterns, hybrid complexity, and accidental architecture.
• Define and operate collaboration and content platforms, including information architecture, governance, permissions, and lifecycle management.
• Architect enterprise messaging architecture, including global mail flow, routing, hybrid integration, and coexistence.
• Architect identity and access foundations, covering authentication models, access control, lifecycle management, and hybrid integration.
• Architect mobile access architecture for iOS and Android.
• Architect the Azure foundations supporting Microsoft 365, identity, automation, monitoring, and remediation.
• Treat observability as non-negotiable, designing deep monitoring, alerting, and telemetry, using tooling that surfaces systemic risk and informs decisions.
• Own BAU operations for the platform, including incidents, degradations, change execution, and continuous improvement.
• Design, implement, and operate self-healing automation that closes the loop between detection, remediation, and prevention.
• Build and maintain production-grade automation using industry-standard tooling, including AI-assisted development where it accelerates delivery without reducing ownership.

Qualifications

• 7+ years' experience as a senior Microsoft 365 engineer or architect, owning and operating mid-to-large enterprise platforms.
• Deep hands-on expertise in SharePoint Online platform engineering and Exchange Online mail flow, including hybrid scenarios.
• Proven track record simplifying complex hybrid environments.
• Strong PowerShell engineering skills and comfort with Microsoft Graph, Azure CLI, Terraform, and GitHub-based Infrastructure-as-Code workflows.
• Highly proficient with Log Analytics and KQL.
• Experience defining and owning MDM/Intune policy and configuration for iOS and Android, across both BYOD and corporate-managed settings.
• Clear, trusted communicator and technical mentor who raises the bar for others.
• High-ownership, continuous-improvement environment, with demonstrated experience owning initiatives end-to-end — from conception through implementation, rollout, skills transfer, and sustained operation.
• Able to autonomously run and deliver global projects across a distributed team and time zones, and drive change without heavy oversight.

Skills

• Strong command of identity and access architecture, including Entra ID / Azure AD and Entra ID Connect (Conditional Access, tenant restrictions, B2B, RBAC, enterprise apps, service principals, app proxy).
• Highly proficient with Log Analytics and KQL.
• Experience defining and owning MDM/Intune policy and configuration for iOS and Android, across both BYOD and corporate-managed settings.
• Comfortable designing and operating Azure resources — policies, subscriptions, workbooks, storage accounts, VNETs, Traffic Manager.
• Experience with Logic Apps/Power Automate/workflow platforms.
• Experience with building and maintaining AI Copilot agents.

Benefits

• The opportunity to work alongside best-in-class professionals from over 40 different countries.
• A highly competitive compensation package, including a global profit-sharing pool and performance-based bonus structure.
• A 401(k) match up to 50%.
• Comprehensive health, mental, dental, vision, disability, and life coverage.
• 25 paid vacation days alongside market holidays.
• Extensive office perks, including breakfast, lunch and snacks, regular social events, clubs, sporting leagues and more.

Pay

N/A

Schedule

N/A