Senior Microsoft 365 Infrastructure/Platform Engineer

Visa Hunt; Poland; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Flexible working format

Competitive salary and benefits

Professional development tools

Job summary

Visa Hunt is seeking a Senior Microsoft 365 Infrastructure/Platform Engineer to operate, maintain, and improve our Microsoft 365 platform in a large-scale enterprise setting. The role focuses on administering Exchange Online, Teams, SharePoint Online, OneDrive for Business, and Entra ID, with automation via PowerShell and Graph.

Strong collaboration across teams is essential. The candidate will lead migrations, tenant consolidations, and post-merger integration efforts, driving automation and

Qualifications

• 5+ years of professional experience as a Microsoft 365 Engineer.
• Experience administering Microsoft 365 in large enterprise environments supporting thousands of users.
• Strong expertise with Microsoft 365 components (Exchange Online, Teams, SharePoint Online, OneDrive for Business, Entra ID).
• PowerShell scripting for automation.
• Hybrid environments including Active Directory and Entra Connect.
• Experience planning and delivering Microsoft 365 migrations, tenant consolidations, and tenant decommissioning projects.
• Experience with M&A, carve-out, or post-merger integration initiatives.
• Strong analytical and problem-solving skills.
• Excellent communication skills, able to explain technical concepts to non-technical stakeholders.
• Upper-Intermediate level of English.

Responsibilities

• Operate, administer, and continuously improve Microsoft 365 enterprise services.
• Manage and optimize Exchange Online, Teams, SharePoint Online, OneDrive for Business, and Entra ID.
• Automate tasks using PowerShell and Microsoft Graph.
• Plan migrations, consolidations, and decommissioning of Microsoft 365 tenants.
• Provide 3rd Level Support for complex Microsoft 365 issues.
• Act as a technical point of contact for User Services.
• Drive cleanup initiatives related to post-merger integration.
• Reduce backlog via automation, documentation, and process improvements.
• Create and maintain technical docs and platform standards.
• Collaborate with cross-functional teams and stakeholders for reliable services.

Skills

Microsoft 365

PowerShell

Exchange Online

Teams

SharePoint Online

OneDrive for Business

Microsoft Entra ID

Active Directory

Microsoft Graph API

English communication

Tools

Microsoft Entra Connect

Microsoft Graph API

Job description

We are looking for a proactive and experienced Senior Microsoft 365 Infrastructure/Platform Engineerto join our team and help operate, maintain, and continuously improve our Microsoft 365 platform in a large-scale enterprise environment.

Our client is a leading European online car marketplace, connecting car buyers and sellers across the continent. The platform serves over 30 million monthly users and operates across 18 countries, making it one of the largest and most trusted digital marketplaces for vehicles in Europe.

Responsibilities:

• Operate, administer, and continuously improve Microsoft 365 enterprise services.
• Manage and optimize Microsoft 365 components, including Exchange Online, Microsoft Teams, SharePoint Online, OneDrive for Business, and Microsoft Entra ID.
• Automate administrative tasks and operational processes using PowerShell and Microsoft Graph.
• Plan and execute Microsoft 365 tenant migrations, consolidations, and decommissioning projects.
• Provide 3rd Level Support by analyzing and resolving complex Microsoft 365 platform issues.
• Act as a technical point of contact for the User Services team, providing guidance and troubleshooting support.
• Drive Microsoft 365 and Entra ID cleanup initiatives related to post-merger integration activities.
• Reduce operational backlog by identifying recurring issues and implementing sustainable improvements through automation, documentation, and process optimization.
• Create and maintain technical documentation, operational procedures, and platform standards.
• Collaborate with cross-functional teams and stakeholders to ensure reliable and scalable Microsoft 365 services.

Requirements:

• 5+ years of professional experience as a Microsoft 365 Engineer.
• Proven experience administering and operating Microsoft 365 in large enterprise environments supporting thousands of users.
• Strong expertise with: Microsoft 365, Exchange Online, Microsoft Teams, SharePoint Online, OneDrive for Business, Microsoft Entra ID (including Enterprise Applications and App Registrations)
• Strong PowerShell scripting skills for automation.
• Hands-on experience with hybrid environments, including Active Directory and Microsoft Entra Connect.
• Experience planning and delivering Microsoft 365 migrations, tenant consolidations, and tenant decommissioning projects.
• Experience with M&A, carve-out, or post-merger integration initiatives.
• Strong analytical and problem-solving skills with a structured, solution-oriented approach.
• Excellent communication skills and the ability to explain technical concepts to non-technical stakeholders.
• Upper-Intermediate level of English

Nice to Have:

• Experience with Microsoft Graph API.
• German language skills.
• Experience driving platform modernization and technical debt reduction initiatives.
• Experience building scalable automation and operational improvements.
• Ability to take ownership, proactively identify improvement opportunities, and drive initiatives independently.
• Experience working in complex enterprise environments with multiple stakeholders.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers