OR
OraclePrincipal Production Service Developer
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Before you apply
LocationDUBLIN, Ireland
Typefull-time
SeniorityLead
Experience6+ yrs
Company size10,000+ people
First seenNov 3, 2026 · 1d ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
6+ years of hands-on experience administering Microsoft 365 in enterprise environments
Strong expertise in Exchange Online, enterprise messaging architecture, mail flow, and troubleshooting
Extensive hands-on experience administering Proofpoint in enterprise environments, ideally 6+ years
Experience with email security and authentication technologies, including DMARC, SPF, and DKIM
Strong knowledge of Microsoft Entra ID (Azure AD), Active Directory, and identity security technologies
Experience supporting Microsoft Teams, SharePoint Online, and OneDrive for Business
Practical experience with PowerShell and automating Microsoft 365 administrative processes
Strong troubleshooting skills across Microsoft 365, messaging, security, and infrastructure environments
Experience working with Windows Server and Linux systems
The ability to independently own technical initiatives while collaborating effectively with distributed engineering teams
Familiarity with Microsoft Purview, Microsoft Defender for Office 365, Microsoft Intune, and AI-assisted automation tools such as ChatGPT or Codex
Relevant Microsoft or Proofpoint certifications are an advantage but are not mandatory
Skills
Microsoft 365
Exchange Online
SharePoint Online
OneDrive
Microsoft Entra ID
Proofpoint
Active Directory
PowerShell
Windows Server
Linux
DMARC
SPF
DKIM
Microsoft Teams
Microsoft Purview
Microsoft Defender for Office 365
Microsoft Intune
ChatGPT
Codex
Benefits
Health insurance
Life insurance
Retirement plan
About the role
Oracle Cloud Infrastructure (OCI) is looking for an experienced Microsoft 365 Engineer to join our Enterprise Collaboration Services team.
Our team is responsible for delivering secure, reliable, and scalable collaboration and messaging services that support Oracle’s global workforce of more than 150,000 users.
We manage business-critical enterprise technologies, including Microsoft 365, Exchange Online, SharePoint Online, OneDrive, Microsoft Entra ID, and Proofpoint, ensuring that employees around the world can communicate and collaborate effectively.
You’ll join a distributed engineering team working across multiple locations, including the UK and Czech Republic, and contribute to the continued improvement of Oracle’s enterprise collaboration infrastructure.
About the Role
We’re looking for a senior, hands-on engineer with strong expertise in Microsoft 365, enterprise messaging, and email security.
This role offers a combination of technical engineering projects, platform improvements, and operational support within a large-scale enterprise environment.
You’ll take ownership of complex technical initiatives, troubleshoot challenging production issues, and work closely with infrastructure, security, networking, and engineering teams to maintain and improve the reliability, performance, and security of our collaboration services.
We’re looking for someone who enjoys solving complex problems, works independently, and brings both technical depth and a proactive approach to engineering.
What You’ll Do
•
Administer, maintain, and optimize Microsoft 365 services, including Exchange Online, Microsoft Teams, SharePoint Online, OneDrive for Business, Microsoft Entra ID, and Microsoft Purview.
•
Manage enterprise messaging infrastructure, including mail flow, routing, transport rules, and email security.
•
Administer and optimize Proofpoint email security solutions, ensuring secure and reliable messaging across the organization.
•
Implement and maintain email authentication and security technologies such as DMARC, SPF, and DKIM.
•
Troubleshoot complex technical issues across Microsoft 365, enterprise messaging, identity, and infrastructure services.
•
Support identity and access management technologies, including Active Directory, Conditional Access, MFA, SSO, and Privileged Identity Management.
•
Improve operational efficiency and service reliability through PowerShell automation and modern AI-assisted engineering tools.
•
Contribute to security, compliance, and governance initiatives using technologies such as Microsoft Defender for Office 365 and Microsoft Purview.
•
Independently drive technical projects and collaborate with global engineering teams on scalable, secure, and resilient solutions.
•
Participate in an on-call rotation supporting business-critical collaboration and messaging services.
What We’re Looking For
We’re looking for an experienced engineer who has worked with Microsoft 365 and enterprise messaging technologies in complex, large-scale environments.
Your background should include:
•
6+ years of hands-on experience administering Microsoft 365 in enterprise environments.
•
Strong expertise in Exchange Online, enterprise messaging architecture, mail flow, and troubleshooting.
•
Extensive hands-on experience administering Proofpoint in enterprise environments, ideally 6+ years.
•
Experience with email security and authentication technologies, including DMARC, SPF, and DKIM.
•
Strong knowledge of Microsoft Entra ID (Azure AD), Active Directory, and identity security technologies.
•
Experience supporting Microsoft Teams, SharePoint Online, and OneDrive for Business.
•
Practical experience with PowerShell and automating Microsoft 365 administrative processes.
•
Strong troubleshooting skills across Microsoft 365, messaging, security, and infrastructure environments.
•
Experience working with Windows Server and Linux systems.
•
The ability to independently own technical initiatives while collaborating effectively with distributed engineering teams.
Nice to have
Familiarity with Microsoft Purview, Microsoft Defender for Office 365, Microsoft Intune, and AI-assisted automation tools such as ChatGPT or Codex would be beneficial.
Relevant Microsoft or Proofpoint certifications are an advantage but are not mandatory.
Why Join Us?
•
Enterprise scale: Work on critical collaboration and messaging platforms supporting more than 150,000 users globally.
•
Technical ownership: Take responsibility for complex engineering projects and challenging technical problems.
•
Modern technologies: Work across Microsoft 365, enterprise messaging, email security, identity management, and automation.
•
Global collaboration: Partner with experienced engineers and technical teams across multiple locations.
• • Continuous improvement: Help improve the reliability, security, and efficiency of Oracle’s enterprise collaboration environment.
About the company
Only Oracle brings together the data, infrastructure, applications, and expertise to power everything from industry innovations to life-saving care. And with AI embedded across our products and services, we help customers turn that promise into a better future for all. Discover your potential at a company leading the way in AI and cloud solutions that impact billions of lives.
True innovation starts when everyone is empowered to contribute. That’s why we’re committed to growing a workforce that promotes opportunities for all with competitive benefits that support our people with flexible medical, life insurance, and retirement options. We also encourage employees to give back to their communities through our volunteer programs.
Legal
We’re committed to including people with disabilities at all stages of the employment process. If you require accessibility assistance or accommodation for a disability at any point, let us know by emailing [email protected] or by calling 1-888-404-2494 in the United States.
Oracle is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans’ status, or any other characteristic protected by law. Oracle will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.