Cyber Security Detection Engineer

About the Team
At Trendyol Tech, our mission is to create a positive impact in our ecosystem by enabling commerce through technology.
We solve complex problems with data, creativity, and agility — always driven by real outcomes. With a culture built on learning, collaboration, and ownership, we grow together while building what’s next.

About The Role

As a Cyber Security Detection Engineer, you will be a cornerstone of our defensive security architecture. This role is designed for a technical expert who excels at building, optimizing, and automating threat detection capabilities within complex, high-scale environments. You will be responsible for ensuring that our security telemetry is not only comprehensive but also actionable and high-performing.

Your primary focus will be the end-to-end lifecycle of security detection: from the engineering of SIEM infrastructure and log orchestration to the development of sophisticated detection logic and automated response playbooks (SOAR). Working at the intersection of Security Operations, Cloud Engineering, and Compliance, you will ensure our defense mechanisms are aligned with industry frameworks such as MITRE ATT&CK and rigorous global standards like ISO27001 and PCI-DSS.

Responsibilities :
• Manage, maintain, and tune the SIEM infrastructure to ensure high-performance log ingestion, processing, and query speeds.
• Lead the automation strategy by authoring comprehensive runbooks and developing custom scripts.
• Design, implement, and continuously fine-tune high-fidelity detection rules.
• Partner with stakeholders and cross-functional teams (Engineering, Product, SRE, IT, Legal) to adapt in a dynamic security landscape.
• Evaluate and implement emerging security technologies and methodologies to continuously enhance our security posture and operational efficiency.
• Ensure compliance with security standards and regulations (e.g ISO27001, PCIDSS) Support audits and security assessments by ensuring controls are properly implemented and evidenced.

Expected Qualifications :
• 3+ years of experience in security.
• Manage and optimize the performance of SIEM platform to ensure effective security monitoring, incident detection, and response.
• Author comprehensive runbooks, write automation scripts, and build SOAR (Security Orchestration, Automation, and Response) capabilities to reduce manual intervention and improve response times.
• Design, implement, and fine-tune advanced detection mechanisms to proactively identify potential security threats and vulnerabilities.
• Utilize MITRE ATT&CK, Cyber Kill Chain, and other frameworks for threat modeling, detection strategy, and incident response.
• Hands-on familiarity with cloud security, Kubernetes, and modern CI/CD environments.
• Support ongoing security compliance, audit, and certification programs.
• Experience with Unix/Linux environments.
• Excellent analytical and problem-solving skills.
• Strong written and verbal communication skills in English.
• Certifications such as CISSP, GCIH, GCFA, CEH, or GCDA are preferred.

What We Offer
- 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.
- Customisable 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.
- Well-being support: Access to location-based in-house doctors, as well as psychologist and dietitian support, and HPV vaccination provision.
- Personalised 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 today, we look forward to taking the next step with you.
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.