GeezerVison

01 / A little context

Systems with purpose. Room for curiosity.

I build reliable software, from distributed systems and cloud infrastructure to small tools for everyday life. My work has taken me through smart cities, critical infrastructure, and security.

Fezcodex is where that engineering meets everything else: independent projects, notes, music, games, and ideas worth following.

Engineer · Maker · Explorer

Selected experience

02 / The work so far

Oct 2022 - Sep 2025 · Picus Security

Senior Software Engineer

Led flagship Exposure Validation (EXV) product development. Architected Cloud Security Validation (CSV) from scratch. Migrated PostgreSQL to MongoDB, reducing query times from 2 hours to under 5 minutes.

Cybersecurity

Jan 2021 - Oct 2022 · Aselsan - Smart Cities

Senior Software Engineer

Engineered Node-RED workflow platform scalability on K8s. Developed core NPM packages for low-code solutions. Built web-based deployment platform abstracting K8s complexity.

IoT / Big Data

Jan 2018 - Jan 2021 · Aselsan - Toll Collection

Software Engineer & DevOps

Refactored monolithic C++98 to C++17 microservices with gRPC. Reduced container sizes from 168MB to 8MB. Implemented air-gapped Nexus Repository Manager.

Critical Infra

Tools I think with

03 / Practice

Go (Golang)System DesignKubernetes & CloudDistributed SystemsNode.js & Express.jsC++ & CPostgreSQL & MongoReact & JSRustCI/CD & DevOps

Education

Valedictorian

Hacettepe University, BSc in Computer Science. GPA: 3.89/4.0. Coursework: Algorithms, Parallel Processing, Computer Networks.

Still learning. Always reading. ↗

Outside the terminal

04 / Other yarns

Sonic Alchemist

Creating beats and melodies. Exploring the intersection of code and sound in music production.

Mechanical Keys

Loved mechanical keyboards. Thock, clack, and tactile perfection.

Narrative Grooving

Vibing with story-driven games. Letting the plot beats drop and the character arcs flow.

Keep in touch

Good things start with a conversation.

Friends of the show ↗Things worth keeping ↗