ABOUT THE TEAM   We’re shaping the future of financial technology at Trendyol. As Trendyol’s technology teams, we’re not only building for today we’re designing the financial experiences of tomorrow. From payment infrastructure and digital wallets to smart credit systems and personalized financial services, we create solutions that empower millions of users across our ecosystem. With Trendyol Pay, we enable fast, secure, and seamless payment journeys. Through Trendyol Finance, we develop inclusive and accessible products that simplify financial decisions.   We are united by a shared purpose:To create a positive impact in our ecosystem by enabling commerce through technology What We Offer A hybrid working model with flexibility — a schedule that helps you find the right balance between flexibility and team bonding, including work-from-abroad opportunities and a summer working model. A customizable FlexBenefits budget — Adjust your daily meal allowance, choose your health insurance package (and extend it to your spouse or children), and pick from additional benefits like fuel support or Trendyol shopping credits. Comprehensive wellbeing support — Take advantage of our extended health package, which includes annual mini health screenings, access to location-based in-house doctors, psychologist and dietitian support, and HPV vaccination coverage. Personalized training allowance and learning opportunities — Use your annual budget for any training or conference of your choice, explore our Learning Management System (LMS) anytime, and join in-person learning sessions offered throughout the year. Responsibility from day one — Take full ownership from the start in a culture where every voice is heard and valued. A diverse, international team — Collaborate with global peers across our offices in Berlin, Amsterdam, Dubai, and beyond, in a startup-spirited and collaborative environment. Opportunities to grow with the best — Tackle meaningful challenges, develop through hands-on experience, and grow with the support of expert guidance and global mentoring. Meaningful connections beyond tasks — Be part of team rituals, events, and social activities that help us stay connected and inspired.     Take the Next Step If this role excites you, apply now and let’s take the next step together. Want to get to know the team better first? Explore our Career Website, LinkedIn, or YouTube to learn more about #LifeatTrendyol and how we work.

About the Role

Responsible for the deployment, configuration, and end-to-end management of the company's network, firewall, and load balancer infrastructure.

Maintain a 7/24 high-availability, low-latency, and highly secure environment (PCI-DSS compliant) capable of handling high-volume financial transactions.

Optimize application traffic using load balancing configurations and design redundant, high-availability (HA) architectures.

Rapidly respond to network issues and security incidents, perform root cause analyses (RCA), and proactively harden the infrastructure against emerging threats.

Qualities We Are Looking For

Deep theoretical and practical foundation in switching, routing, TCP/IP protocols, VPNs, VLANs, and dynamic routing protocols (BGP, OSPF, etc.)

Hands-on experience with enterprise-grade firewalls, rule management, NAT, IPS/IDS, and security policy design.

Experience in L4/L7 load balancing

Prior experience in fintech, banking, or managing high-traffic, mission-critical environments is a plus.

Proven ability to diagnose and resolve complex network and security issues efficiently.