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MH@mhirsihamza
Senior Cyber Security Engineer with expertise in Zero Trust architecture.
GermanyI design and build security ecosystems that don’t just defend, but thrive under pressure. At Taxfix, I lead Zero Trust initiatives that cut identity-based risk by 60% through tightly scoped IAM roles and re-architected network segmentation. I conducted a full audit of IAM roles against CIS benchmarks, explained the gaps to engineering and leadership teams, and drove remediation that hardened access across critical infrastructure.
Before that, at Rakuten Symphony, I architected secure 5G environments and rolled out Zero Trust frameworks that shrank internal attack surfaces. One of my proudest chapters? Leading a small but mighty Vault and PKI team (just 3 of us) for a year was one of the most rewarding experiences of my career. We’re still close friends today, bonded over crypto (the keys, not the coins) and clean cert chains.
I also embedded security-by-design into 10+ product features, helping dev teams move fast without creating risk. Whether it’s aligning with ISO 27001, GDPR, or designing secure architectures from scratch, I bring exactly what security engineering roles need: strong fundamentals, hands-on architecture experience, and the ability to work cross-functionally with devs, product, and compliance.
On the soft side: I lead with clarity, speak both code and business, and have a sharp eye for detail, probably why I always end up finding a vulnerability somewhere in every company I work at. Let’s see what I’ll find in yours😏
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Work history, roles, and key accomplishments
Taxfix
Jul 2024 - Present (1 year 4 months)
Led Zero Trust Security Architecture on Google Cloud Platform, designing and deploying a new IAM and network model that reduced identity-based risk exposure by 60%. Integrated Security into SDLC, embedding secure-by-design principles into over 30+ product features across cross-functional engineering squads.
Rakuten Symphony Deutschland
Apr 2022 - Jun 2024 (2 years 2 months)
Architected Secure 5G Environments across RAN, core network, and self-hosted cloud infrastructure, embedding secure-by-design principles into 10+ telecom projects. Led Zero Trust Implementations, designing identity-centric architectures with strict segmentation and access control, reducing internal threat exposure by 65%.
Neat Consulting
Nov 2021 - Mar 2022 (4 months)
Performed 20+ end-to-end penetration tests on web applications across fintech, SaaS, and e-commerce platforms, identifying an average of 6 critical and high-risk vulnerabilities per engagement. Utilized industry-standard tools including Burp Suite, OWASP ZAP, and custom Python scripts to uncover complex flaws in authentication, access control, and session management.
Venari Security
Jan 2019 - Oct 2021 (2 years 9 months)
Led development of an alpha-stage malware detection system capable of analyzing encrypted traffic without decryption, reducing reliance on traditional deep packet inspection by 80%. Designed and deployed data collection tools across 5+ client networks, ensuring seamless integration with centralized threat analysis and visualization platforms.
Degrees, certifications, and relevant coursework
TEEngineering, IT in cybersecurity
2016 - 2019
Activities and societies: Computer and Information Systems Security/Information Assurance
Conducted applied research on enhancing encrypted traffic analysis by integrating threat intelligence techniques into AI-driven malware detection systems.
GermanyYou can contact M'hirsi and 90k+ other talented remote workers on Himalayas.
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