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Ahmet Feyzi Gülmez

01Intro

Cybersecurity & AI-Focused Software Developer

I build end-to-end systems with security designed in from the start.

  • 1live system
  • 131automated tests
  • 2USOM/TR-CERT terms

02About

I work at the intersection.

I graduated in Information Systems & Technologies in 2026. I work at the intersection of cybersecurity and software development: I have delivered live systems for real clients and completed two cybersecurity internship terms at USOM/TR-CERT, Türkiye's national cyber incident response center. My core strength is orchestrating AI tools like a conductor to build systems whose architecture I design myself — security is not a layer added later, it is the foundation.

AnkaraB.Sc. Information Systems & Technologies 2026USOM/TR-CERT ×2TR/EN
  1. Interface
  2. Application
  3. Data
  4. Infrastructure
  5. Security

03Projects

What I have shipped.

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  1. Gökhan Man Style home page: brand mark, service headline and booking buttonAdmin panel overview screen: daily appointments, weekly revenue and customer count indicators
    FeaturedLive
    Gökhan Man Style logo

    Gökhan Man Style

    Live client system

    The end-to-end digital system of a barbershop: online booking, phone-OTP sign-in, an admin panel and four languages. Not a website but a working system — the client uses it every day.

    • Next.js 15
    • Drizzle
    • Neon
    • Better-Auth
    • Mapbox
    gokhanmanstyle.comOpen the live site in a new tab
  2. Tuğra

    Forensic document verification · Windows

    A desktop application that detects forgery signals in PDF and office documents on an evidence-first basis. Every finding is reported with a verifiable trace from the file structure itself.

    68automated tests
    • Python
    • pikepdf
    • sertleştirilmiş XML parser
  3. TAMGA & TURAN

    Multi-agent, source-verified AI

    AI systems whose agents audit one another: every output passes a verifier and critical actions require human approval. Source-grounded answers via RAG, five-layer architecture.

    • Python
    • Supabase
    • pgvector
  4. İzinsiz Erişim Koruma

    Windows security tool

    A protection tool that detects unauthorised access and records it with evidence. Password storage with argon2id, fail-safe behaviour, camera evidence at the moment of the event.

    63automated tests
    • Python
    • Windows API
    • argon2id
  5. Live

    ahmetfeyzigulmez.com

    This site

    The site you are looking at. Scroll choreography synchronised on a single clock, a WebGL particle network, three languages and a strict content security policy. Feel free to read the source.

    • Next.js 16
    • GSAP
    • Three.js
    • Lenis
    • next-intl
    ahmetfeyzigulmez.comOpen the live site in a new tab

04Experience

Where I have worked.

  1. 2023 — 2026

    Freelance Software Developer

    Self-employed

    End-to-end business systems for companies: booking, orders, stock and admin panels. A corporate web renewal for a defence-aviation supplier, and Türkiye e-commerce advisory for an international brand.

  2. Summer 2022 & 2023

    Cybersecurity Intern

    USOM / TR-CERT (BTK) · Ankara

    Two cybersecurity internship terms at Türkiye's national cyber incident response center.

  3. September — October 2024

    IT Operations

    Akkuyu Nuclear Power Plant

    On-site IT operations.

  4. November — December 2024

    Sales & Marketing Specialist

    MediaMarktSaturn

    Retail sales and customer advisory.

05Skills

What I do, and at which layer.

Cybersecurity

Network security, secure coding, OSINT & threat intelligence, OWASP/web vulnerabilities. Malware analysis & reverse engineering; digital forensics.

  • OWASP
  • Wireshark
  • Nmap
  • Metasploit
  • Burp Suite
  • IDA
  • x64dbg
  • PeStudio
  • YARA
  • Volatility
  • FTK

AI & Systems

LLM API integration, RAG for source-grounded answers, multi-agent orchestration, prompt and context engineering. The security layer is in the design, not bolted on.

  • LLM API
  • RAG
  • pgvector
  • Supabase
  • Anthropic API
  • OpenAI API

Software

End-to-end web and desktop development; relational data modelling, containerisation and deployment on Linux.

  • Next.js
  • React
  • TypeScript
  • Python
  • Kotlin
  • PostgreSQL
  • Supabase
  • Tailwind
  • PWA
  • Git
  • Docker
  • Linux

06Services

What I do for clients.

Web & Business Systems

Not a website but a system: booking, orders, admin panel and content — all from one place.

Automation & AI

Flows that take over repetitive work, and AI integration built for your business.

Security-First Setup

Architecture secure from the start and GDPR/KVKK-compliant infrastructure — not a later patch.

07CV

CV access.

The CV is shared through a separate link. The link is personal and time-bound; it opens with the address I send during an application. Turkish and English versions are on the same page.

CV access is provided via an application link

Write for a link

08Contact

Let's talk.

A role, a project or a question — write, and we will look at it together.