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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Microsoft 365 Engineer - **Company:** BV HOLDINGS LLC - **Location:** Chicago, IL, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Apple IOS, Microsoft Azure, Microsoft Online Services, Software as a Service, Cloud Computing, Cloud Storage, Github, Log Analysis, Microsoft Windows SDK, Windows PowerShell, Role-Based Access Control, Azure Active Directory, Kusto Query Language, Microsoft SharePoint, Microsoft Power Automate, Azure Powershell, Microsoft InTune, Information Technology, Terraform, Azure Resource Manager, AI Co-pilot - **Published:** October 19, 2026 - **Apply:** https://www.careerbuilder.com/job-details/senior-microsoft-365-engineer-chicago-il--77400035-d4ed-4ff6-87f7-42cfe736a10b ## About the Role * 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 * 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) * 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 * Comfortable designing and operating Azure resources - policies, subscriptions, workbooks, storage accounts, VNETs, Traffic Manager * Experience defining and owning MDM/Intune policy and configuration for iOS and Android, across both BYOD and corporate-managed settings * Comfortable debating architecture with senior peers and backing decisions with data * A clear, trusted communicator and technical mentor who raises the bar for others * Thrives in a 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 Experience that helps * Tertiary qualification in Computer Science or a related field; recent (~3 years) Microsoft certification in Azure or M365 * Background in an enterprise environment with heavy Microsoft platform adoption - Financial Services, Logistics & Transportation, Resources & Mining, Big Tech/SaaS/Cloud, or as a Managed Service Provider or Microsoft integration partner - particularly in large-user-base, campus-style environments * Prior experience at Principal Consultant or Architect level, in presales design and engineering, or in project management * Exposure to Microsoft 365 Defender and threat protection, Purview or advanced compliance tooling, Logic Apps/Power Automate/workflow platforms, or building and maintaining AI Copilot agents * Experience in a trading firm or other ultra-low-tolerance production environment ## Description Optiver's Global Enterprise Clients team owns the global Microsoft 365 platform - collaboration, messaging, identity, and mobile access - that our entire worldwide workforce runs on every day. It's treated as critical production infrastructure, not a back-office system. You'll join an established, distributed group of senior Microsoft 365 engineers spread across our global offices, operating a single global platform, in a hands-on role with real architectural influence: engineers here design solutions, validate them with peers, and implement them directly. Observability, continuous capability uplift, CI-driven change, and self-healing automation are central to how we keep this platform reliable at scale.What you'll do·Set direction and design standards for our global Microsoft 365 platform across collaboration, messaging, identity, and device accessLead arcitectural decisions end-to-end - design, peer validation, implementation - driving change from inception through global rollout and adoption, with full ownership of global deliverablesDrive systemic simplification, reducing legacy patterns, hybrid complexity, and accidental architectureDefine and operate our collaboration and content platforms, including information architecture, governance, permissions, and lifecycle managementOwn enterprise messaging architecture, including global mail flow, routing, hybrid integration, and coexistenceArchitect identity and access foundations, covering authentication models, access control, lifecycle management, and hybrid integrationDefine and own mobile access architecture for iOS and AndroidArchitect the Azure foundations that support Microsoft 365, identity, automation, monitoring, and remediationTreat observability as non-negotiable - design deep monitoring, alerting, and telemetry, using tooling that surfaces systemic risk and informs decisionsOwn BAU operations for the platform, including incidents, degradations, change execution, and continuous improvementDesign, implement, and operate self-healing automation that closes the loop between detection, remediation, and preventionBuild and maintain production-grade automation using industry-standard tooling, including AI-assisted development where it accelerates delivery without reducing ownershipWhat you'll getYou'll join a culture of collaboration and excellence, surrounded by curious thinkers and creative problem-solvers. Motivated by a passion for continuous improvement, you'll thrive in a supportive, high-performing environment alongside talented colleagues, collectively tackling some of the toughest challenges in the financial markets.In addition, you'll receive:The opportunity to work alongside best-in-class professionals from over 40 different countriesHighly competitive compensation package, including a global profit-sharing pool and performance-based bonus structure401(k) match up to 50%Comprehensive health, mental, dental, vision, disability, and life coverage25 paid vacation days alongside market holidaysExtensive office perks, including breakfast, lunch and snacks, regular social events, clubs, sporting leagues and moreWho you are7+ years' experience as a senior Microsoft 365 engineer or architect, owning and operating mid-to-large enterprise platformsDeep hands-on expertise in SharePoint Online platform engineering and Exchange Online mail flow, including hybrid scenariosStrong 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)Proven track record simplifying complex hybrid environmentsStrong PowerShell engineering skills and comfort with Microsoft Graph, Azure CLI, Terraform, and GitHub-based Infrastructure-as-Code workflowsHighly proficient with Log Analytics and KQLComfortable designing and operating Azure resources - policies, subscriptions, workbooks, storage accounts, VNETs, Traffic ManagerExperience defining and owning MDM/Intune policy and configuration for iOS and Android, across both BYOD and corporate-managed settingsComfortable debating architecture with senior peers and backing decisions with dataA clear, trusted communicator and technical mentor who raises the bar for othersThrives in a high-ownership, continuous-improvement environment, with demonstrated experience owning initiatives end-to-end - from conception through implementation, rollout, skills transfer, and sustained operationAble to autonomously run and deliver global projects across a distributed team and time zones, and drive change without heavy oversightExperience that helpsTertiary qualification in Computer Science or a related field; recent (~3 years) Microsoft certification in Azure or M365Background in an enterprise environment with heavy Microsoft platform adoption - Financial Services, Logistics & Transportation, Resources & Mining, Big Tech/SaaS/Cloud, or as a Managed Service Provider or Microsoft integration partner - particularly in large-user-base, campus-style environmentsPrior experience at Principal Consultant or Architect level, in presales design and engineering, or in project managementExposure to Microsoft 365 Defender and threat protection, Purview or advanced compliance tooling, Logic Apps/Power Automate/workflow platforms, or building and maintaining AI Copilot agentsExperience in a trading firm or other ultra-low-tolerance production environmentWho we areAt Optiver, our mission is to improve the market by injecting liquidity, providing accurate pricing, increasing transparency and stabilising the market no matter the conditions. With a focus on continuous improvement, we prioritise safeguarding the health and efficiency of the markets for all participants. As one of the largest market making institutions, we are a respected partner on 100+ exchanges across the globe.Our differences are our edge. Optiver does not discriminate on the basis of race, religion, color, sex, gender identity, sexual orientation, age, physical or mental disability, or other legally protected characteristics.