We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As an Expert Cyber Security Engineer at client, you are more than just a tester; you are the bridge between our cutting-edge AI security product and our most sophisticated global clients. This role is a unique 50/50 split between deep-core security research and high-impact customer engagement.

You will help us move beyond traditional, one-off pentesting toward an AI-first model of continuous validation. You will challenge our AI agent’s findings, expand upon its capabilities, and lead the technical conversation with our customers to prove the value of AI-driven security.

Responsibilities:

• Strategic Customer Advisory (50%): * Act as the "Face of Security" for Client during POCs and deep-dive technical sessions with external stakeholders
  • Present complex security findings and AI-generated insights to sophisticated clients, helping them interpret risks and prioritize remediation
  • Navigate the nuances of an early-stage AI product, confidently managing client expectations and demonstrating the system's evolving capabilities
• Offensive Security Research (30%): * Perform manual, hands-on penetration testing to validate and expand upon the AI agent's findings
  • Investigate the "edge cases" where AI might hallucinate or miss logic-driven flaws, providing the human expertise needed to ensure 100% accuracy
  • Conduct vulnerability research across complex web applications and modern cloud-native infrastructures
• Product R&D & Innovation (20%):
  • Collaborate directly with the development team to improve the AI agent’s scanning methodology, coverage, and test case validation
  • Build security tools, scripts (Python), and prototypes to automate repetitive testing tasks and enhance the backend engine

Requirements:

• 7+ years of experience in cybersecurity, with a heavy focus on advanced web application penetration testing
• The "Consultant Mindset": Proven experience in a client-facing role (e.g., as a Security Consultant or Pre-Sales Engineer) where you have presented technical findings to external stakeholders
• Technical Depth: Ability to identify complex, business-logic-driven vulnerabilities that automated scanners miss (multi-stage auth bypass, complex injection flaws)
• Automation Skills: Solid Python scripting skills to build security tools and automate workflows
• Startup DNA: You are proactive, flexible, and comfortable with the "controlled chaos" of a fast-growing startup. You don't just wait for tasks; you challenge requirements and propose better ways to work

Desirable:

• Experience securing AI/ML platforms or serverless architectures
• Expertise in AWS, GCP, or Kubernetes security
• Industry-standard certifications (OSCP, OSEP, CISSP)

Personal skills:

• Resilience & Composure: You stay calm during live demos and can pivot the conversation if a technical tool behaves unexpectedly
• The Proactive Challenger: You are willing to push back on inappropriate work assignments and "challenge" the status quo to ensure the product stays on the right path
• Bilingual Skills: You speak "Developer," "Hacker," and "Business" fluently

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Enjoy radical flexibility – work remotely or from an office, your choice
• Care: Medical subscription to Regina Maria, meal tickets of 16 ron net/day worked

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

In Romania, we welcome top-tier tech talent — whether from our Bucharest office or fully remotely. Tap into deep industry knowledge, grow your career, and make an impact in an empowering environment.

Want to learn more about us? Follow us on Instagram, Facebook, .

Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

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Penetration Testing

Python

Security Policies / Procedures / Standards