Buğra KÖSEOĞLU

CTO & Offensive Security Architect @ DGN Tech Inc. | Leading Cloud-Native Security Solutions

Ankara, Türkiye

About

As CTO and Offensive Security Architect at DGN Tech Inc., I focus on developing secure, scalable cloud-native platforms with expertise in developer tools, software development, and enterprise software. My work emphasizes microservice architecture, DevSecOps practices, AI-powered fraud detection, and advanced backend systems, including authentication flows, WebRTC infrastructure, and API gateway design. With over 11 years of experience in software development, security, and systems architecture, my mission is to bridge robust security practices with innovative technology solutions. I am passionate about creating secure, production-ready infrastructures that prioritize scalability, maintainability, and operational integrity.

Experience

  • CTO & Offensive Security Architect at DGN Tech Inc.
    Mar 2026 - Present · 4 mos

    Leading architecture and engineering for a U.S.-based security-focused technology platform. Focused on cloud-native backend systems, microservice architecture, DevSecOps, AI-powered fraud detection, abuse prevention, API gateway design, authentication flows, WebRTC infrastructure, and production-ready deployment pipelines. Key contributions: • Designed scalable microservice architecture from the ground up • Built backend and infrastructure strategy for auth, user, chat, notification, WebRTC, game, CDN, and admin systems • Developed AI-based fraud and abuse detection architecture • Established secure deployment, monitoring, and DevSecOps practices • Led backend architecture, infrastructure ownership, and security strategy

  • Independent Software, Security & Blockchain Consultant at Freelance / Self-employed
    Dec 2014 - Present · 11 yrs 7 mos

    Delivered backend, cybersecurity, blockchain, infrastructure, automation, DevOps, and security-focused projects across independent consulting engagements. Worked on backend APIs, full-stack systems, blockchain prototypes, penetration testing, infrastructure hardening, Linux administration, Dockerized deployments, reverse proxy setups, WAF concepts, and security monitoring workflows. Core areas: • Backend & distributed systems • Offensive security & application security • Blockchain infrastructure & smart contract systems • DevOps, Linux, Docker, Nginx, PostgreSQL, Redis

  • Software Architect (Contract / Advisory) at Enterprise Project
    Dec 2025 - Mar 2026 · 4 mos

    Designed scalable and resilient software architectures for complex backend systems, focusing on service boundaries, domain ownership, module responsibilities, dependency direction, and maintainability. Helped reduce architectural debt by clarifying system responsibilities, improving communication flows, and supporting long-term technical decision-making.

  • Security Architect (Contract / Advisory) at Confidential Security Project
    Dec 2025 - Mar 2026 · 4 mos

    Designed fraud and abuse detection architectures based on behavioral signals, SMS and call pattern analysis, anomaly detection, alerting, and operational monitoring. Contributed to secure data-flow design, backend detection workflows, abuse prevention logic, and hardening-oriented architecture decisions.

  • Co-Founder & CTO at ETHOSEVO
    Jun 2025 - Feb 2026 · 9 mos

    Led Ethosevo as a deep-tech R&D and security-focused technology initiative. Worked on system architecture, cybersecurity, blockchain infrastructure, AI infrastructure, custom WAF concepts, and cloud-native platform ideas. Focused on building experimental infrastructure for secure multi-tenant systems, developer tooling, backend workloads, and advanced security research.