Fintech Network Engineer: High-Availability & Security

Trendyol; Fatih; Hybrid; TRY 600,000 - 900,000; Full time

Benefits offered by this job

Hybrid work model

FlexBenefits budget

Health insurance (extended to family)

Wellbeing program

Learning budget and training

Global collaboration and mentoring

Job summary

Trendyol is seeking a Network Engineer to strengthen our fintech infrastructure, ensuring the network, firewall, and load balancer operate with maximum uptime, robust security, and high performance. You will contribute to a PCI-DSS compliant, low-latency environment supporting high‑volume financial transactions.

In a hybrid model with opportunities to work from abroad, you will rapidly respond to incidents, perform RCAs, and harden our infrastructure while collaborating with our international

Qualifications

• Strong knowledge of switching, routing, TCP/IP; familiarity with VPNs, VLANs, and BGP/OSPF.
• Hands-on experience with enterprise firewalls, NAT, IPS/IDS, and security policy design.
• Experience in L4/L7 load balancing.
• Fintech, banking, or high-traffic environments are a plus.
• Proven ability to diagnose and resolve complex network and security issues.

Responsibilities

• Deploy, configure, and manage the company's network, firewall, and load balancer infrastructure end to end.
• Maintain a 7/24 high-availability, low-latency, PCI-DSS compliant environment for high-volume transactions.
• Optimize application traffic with load balancing configurations and design HA architectures.
• Respond to network issues and security incidents, perform RCA, and harden infrastructure against threats.

Skills

Switching and routing

TCP/IP protocols

VPNs

VLANs

BGP/OSPF

Enterprise firewalls

NAT

IPS/IDS

L4/L7 load balancing

Security policy design

Education

Bachelor's degree in networking or related field

Tools

Firewall management tools

Load balancers

Job description

Trendyol is seeking a Network Engineer to strengthen our fintech infrastructure, ensuring the network, firewall, and load balancer operate with maximum uptime, robust security, and high performance. You will contribute to a PCI-DSS compliant, low-latency environment supporting high‑volume financial transactions.

In a hybrid model with opportunities to work from abroad, you will rapidly respond to incidents, perform RCAs, and harden our infrastructure while collaborating with our international