Windows Systems Engineer - Fintech

Windows Systems Engineer, Fintech

Optasia · Athens, Greece (Hybrid) · — · Posted 2026-09-14

Workplace: hybrid

Department: Technology & Innovation

Description

Optasia is a real-time financial intelligence company. We build precision intelligence that unlocks financial opportunity at scale, running millions of automated credit decisions every day across high-growth markets where formal credit data is limited. Our AI-powered platform turns permitted behavioural data and real-time signals into precise, responsible credit decisions. Embedded within the systems of telcos, banks, digital wallets and other partners, it helps them extend relevant financial services to more people while maintaining strong portfolio control and opens profitable new segments that were previously out of reach. This is how Optasia turns potential into financial progress, responsibly and at scale.

As a member of the Systems Engineering team in Optasia, you will be responsible for the effective provisioning, installation/configuration, operation, and maintenance of Microsoft-based systems infrastructure. This individual participates in technical research and development to enable continuous innovation within the enterprise environment.
This role ensures that Windows Server platforms, Azure services, Active Directory, endpoint management systems, and related procedures adhere to organizational values and security standards, enabling staff, partners, and stakeholders to operate efficiently and securely.

What you will do

• 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.

What you will bring

• 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 ownership skills, with experience mentoring engineers.
• Fluent English (both written and spoken).

Your key attributes

• Customer service orientation.
• Excellent communication skills and collaborative mindset.
• Comfortable working in a fast-paced and evolving environment.
• Pro-activeness, accountability, and results orientation.
• Hard working attitude and willingness to commit on project.
• Experience working with secure configuration baselines and security frameworks (CIS, NIST).
• Strong attention to detail.

Why Optasia?

Optasia is a high-growth, AI-powered financial infrastructure platform serving over 432 million users in emerging markets across Africa and Asia. By harnessing the power of AI and real-time data we unlock financial opportunities for customers. We have been recognized as a top fintech by Forbes Middle East, culminating in a successful JSE listing in 2025.

At Optasia, our global team builds the tech, products and services which will change the game for the world's unbanked population. We empower our people by offering unique employee experiences and support individual careers by prioritizing well-being and embracing flexibility.

Benefits include:

• Work from anywhere policy 
• Competitive remuneration package 
• Extra day off on your birthday
• Performance-based bonus scheme
• All the tech gear you need to work smart

Apply

Apply at Optasia

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