Global Microsoft 365 Architect – Platform Leadership

Optiver Holding BV; Chicago (IL); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Profit-sharing

Bonus program

401(k) match

Health & dental & vision

Office perks

Job summary

Optiver's Global Enterprise Clients team owns the global Microsoft 365 platform — collaboration, messaging, identity, and mobile access — that our workforce runs on daily. Join a distributed group of senior engineers across the globe, with architectural influence and hands-on delivery.

You'll design standards, lead end-to-end architectural decisions, own BAU operations, and drive automation, observability, and modernization, partnering across time zones.

Qualifications

• 7+ years of experience as a senior Microsoft 365 engineer or architect, owning and operating mid-to-large enterprise platforms.
• Deep hands-on expertise in SharePoint Online and Exchange Online mail flow, including hybrid scenarios.
• Proven capability in identity and access architecture, Entra ID / Azure AD and related controls.

Responsibilities

• Set direction and design standards for global Microsoft 365 platform across collaboration, messaging, identity, and device access.
• Lead architectural decisions end-to-end — design, peer validation, 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.
• Own enterprise messaging architecture, including global mail flow, routing, hybrid integration, and coexistence.
• Architect identity and access foundations, covering authentication models, access control, lifecycle management.
• Define and own mobile access architecture for iOS and Android.
• Architect the Azure foundations that support Microsoft 365, identity, automation, monitoring, and remediation.
• Treat observability as non-negotiable — design 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.

Skills

Microsoft 365 engineering

SharePoint Online

Exchange Online mail flow

Identity and access architecture

Conditional Access

PowerShell engineering

Microsoft Graph

Azure CLI

Terraform

GitHub-based IaC

Log Analytics

KQL

MDM/Intune policy

Hybrid environments

Education

Tertiary qualification in Computer Science or related field

Microsoft certification in Azure or M365

Tools

Terraform

Azure CLI

GitHub Actions

PowerShell

Job description

Optiver's Global Enterprise Clients team owns the global Microsoft 365 platform — collaboration, messaging, identity, and mobile access — that our workforce runs on daily. Join a distributed group of senior engineers across the globe, with architectural influence and hands-on delivery.

You'll design standards, lead end-to-end architectural decisions, own BAU operations, and drive automation, observability, and modernization, partnering across time zones.