Senior Network & Platform Security Specialist

Welcome sahibinden.com world!

• We work for WOW? moments
• We stay curious and explore, we love innovation
• We look into the same topics from different perspectives
• We celebrate and feel proud of our success together

Is that you? Great!

We are looking for a Network & Platform Security Specialist who is passionate about secure, scalable, and high-performance infrastructure. You will be responsible for analyzing existing systems, identifying risks, designing secure network solutions, and collaborating with cross-functional teams. The ideal candidate combines strong technical expertise with a proactive approach to improving infrastructure and security practices.

Job Description

• Plan for future network needs and implement infrastructure changes accordingly
• Design and test LAN/WAN systems using the latest tools and methods
• Lead projects to improve network functionality or resolve persistent issues
• Troubleshoot network and server connectivity problems regularly
• Analyze network performance and submit quarterly improvement reports
• Provide technical guidance, training, and support to internal teams
• Automate monitoring and server processes to improve efficiency
• Optimize performance, throughput, and latency across systems

Qualifications & Requirements

• Bachelor’s degree in Computer, Electronics Engineering, or a related field
• 4+ years of hands-on experience in network/system administration and troubleshooting
• Valid certifications preferred (e.g., CCNA, NSE4–7 or equivalent)
• Expertise in firewall technologies, especially Fortigate
• Experience with Citrix Netscaler and routing/switching (Arista Networks is a plus)
• Proficiency in Python for scripting and automation
• Familiarity with open source load balancers is a plus
• Solid knowledge of system security, virtualization, and Linux (Debian preferred)
• Understanding of SDN, cloud infrastructure (public/private), and web services is a plus
• Experience in datacenter infrastructure (physical and cloud-based)
• Ability to work independently on complex projects
• Strong communication skills and ability to collaborate across teams
• Willingness to respond to after-hours support requests
• Proactive, detail-oriented, and passionate about new technologies and open-source tools

What We Offer

• 2 week remote working option available throughout the year
• Birthday leave
• One week accommodation at Richmond Efes and Pamukkale Hotels (for employees who have completed 3 years at Sahibinden.com)
• Well-being opportunities;
• Quality life package
• Gym and Dietician service

"Your personal data to be collected within the scope of the applications you will make through this job posting, will be carried out and processed for the purposes of conducting job application processes and evaluating your job application by Sahibinden Bilgi Teknolojileri Pazarlama ve Ticaret Anonim Şirketi (“Sahibinden”) as a data controller in accordance with the Law on the Protection of Personal Data No. 6698 (“KVKK”) and the relevant legislation.”

“We believe in the importance of equal treatment in our recruitment process. Inline with our diversity, equality and inclusion policy, we evaluate each application process in a transparent and fair manner and we focus on the skills of each applicant regardless of religion, race or gender.”