
IT Infrastructure Specialist
2 days ago
We are seeking an experienced IT Infrastructure Specialist to join our team at Reaktor's Defence & Security Unit in Helsinki.
This role requires strong knowledge of Linux (Ubuntu, CentOS, or similar), deep understanding of IP networking, VPNs, firewalls, VLANs, and network protocols. Proficiency in PKI and authentication mechanisms, including certificate management (TLS/SSL, CA, OCSP, CRL, etc.), is also essential.
The ideal candidate will have a minimum of 5-10 years of experience in a similar role, with the ability to troubleshoot network and integration issues, work independently in customer environments, and effectively communicate with both technical and non-technical stakeholders.
Responsibilities:
- Software Deployment & Integration – Install, configure, and integrate our products at customer sites, ensuring compatibility with their IT infrastructure.
- Pre-Installation Planning – Prepare network and security configurations, validate system requirements, and help automate setup processes.
- Administering Reaktor DefSec's classified IT systems – Be also a part of the DefSec's SysAdmin team.
- Customer Support & Troubleshooting – Diagnose and resolve integration issues related to e.g. networking, authentication, and security.
- System Maintenance & Upgrades – Perform onsite software updates and configuration changes.
- Technical Collaboration – Work closely with our clients' IT teams and our own development teams to ensure successful installations and integrations.
- Onsite Travel – Travel to our clients' locations for installations, updates, and troubleshooting in Finland & abroad, mostly within the EU.
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