Windows Systems Engineer, Fintech

Optasia

Windows Systems Engineer managing infrastructure for a B2B2X financial technology platform in Greece. Overseeing Microsoft systems including Azure and Active Directory for scalability and performance.

Posted 5/25/2026full-timeAthens • 🇬🇷 GreeceSeniorLeadWebsite

Tech Stack

Tools & technologies

Azure

About the role

Key responsibilities & impact

Lead the design, implementation, and optimization of Microsoft-based systems for scalability, security, and performance.
Take ownership of Windows and Azure architecture decisions, contributing to long-term infrastructure strategy and roadmap planning.
Design and manage enterprise Active Directory environments, including GPO governance and identity management.
Administer and optimize Windows Server 2022 / 2025 environments.
Manage and enhance Microsoft Intune for endpoint lifecycle management, compliance enforcement, and secure device provisioning.
Architect and support Azure environments, including identity, networking, backup, and disaster recovery solutions.
Act as a technical authority during critical incidents: diagnose, troubleshoot, and resolve complex Microsoft-related production issues under pressure.
Drive automation initiatives using PowerShell and Azure-native tools to eliminate manual tasks and improve operational reliability.
Establish and enforce system hardening, compliance standards, and Microsoft security best practices (CIS, NIST, etc...).
Administer and support collaboration platforms such as Jira, Confluence, and Bitbucket, ensuring integration with infrastructure workflows.
Mentor and support junior and mid-level engineers, fostering knowledge sharing.
Collaborate with cross-functional teams to align infrastructure capabilities with business objectives.
Evaluate and introduce new Microsoft technologies to enhance system resilience and performance.

Requirements

What you’ll need

7+ years of proven experience as a Systems Engineer, Infrastructure Engineer, or similar senior-level role focused on Microsoft technologies.
BSc/MSc degree in Computer Science, Engineering, or a related field will be considered a plus.
Deep expertise with Windows Server 2022 / 2025 administration and optimization.
Strong experience with Active Directory.
Experience with Microsoft Intune and endpoint security management.
Experience with Microsoft Azure.
Strong PowerShell scripting skills and automation mindset.
Strong understanding of networking fundamentals, storage systems, and virtualization platforms.
Proven track record of building secure, highly available Microsoft infrastructures.
Experience with Jira, Confluence, and Bitbucket administration and integration.
Strong incident management and root cause analysis capabilities.
Excellent communication and leadership skills, with experience mentoring engineers.
Fluent English (both written and spoken).

Benefits

Comp & perks

💸 Competitive remuneration package
🏝 Extra day off on your birthday
💰 Performance-based bonus scheme
💻 All the tech gear you need to work smart
🎌 Be a part of a multicultural working environment
🎯 Meet a very unique and promising business and industry
🌌 Gain insights for tomorrow market’s foreground
🎓A solid career path within our working family is ready for you
📚 Continuous training and access to online training platforms
🥳 CSR activities and festive events within any possible occasion
🍜 Enjoy comfortable open space restaurant with varied meal options every day
🎾 Wellbeing activities access such as free on-site yoga classes, plus available squash court on our premises

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Windows Server 2022Windows Server 2025Active DirectoryMicrosoft IntuneMicrosoft AzurePowerShellnetworking fundamentalsstorage systemsvirtualization platformssystem hardening

Soft Skills

incident managementroot cause analysiscommunicationleadershipmentoringcollaborationknowledge sharingproblem-solvingautomation mindsetpressure management

Certifications

BSc in Computer ScienceMSc in Engineering