Editorial portrait placeholder for Serhan Yildiz

About

Secure, practical delivery.

I specialize in backend architectures, system security and practical delivery for businesses that need one reliable technical partner.

I care about building the right system: one that is secure, maintainable, understandable and stable enough to support real business use without unnecessary complexity.

Clear communication, direct accountability and practical security are non-negotiable parts of the engagement.

Security-first architecture

I design with threat modeling, secure defaults and attack-surface awareness early so fixes do not arrive after product momentum is already lost.

Business-aware engineering

The technical choice matters only if it improves trust, launch readiness, search visibility or conversion quality.

Freelance clarity

You work with the person doing the analysis, the implementation and the tradeoff decisions. That shortens loops and improves outcomes.

Engagement model

Direct execution

Strategy and implementation stay in the same loop.

No agency handoffs

Secure by default

Security questions are handled during the build, not after launch.

Risk addressed early

Operational awareness

Infrastructure and deployment constraints are considered from the first scope draft.

Fewer launch surprises

Preferred toolkit

PHPCodeIgniter 4AI / LLM systemsMySQLNext.js App RouterCustom software architectureE-commerce systemsDocker & CoolifyApache / Nginx / CaddyMail server operationsLinux operationsCyber security reviews

Capabilities

PHP / CodeIgniter 4

95%

Backend architecture, business logic, admin panels and maintainable application structure.

AI systems

92%

Advanced AI workflows, LLM application design, automation and model-assisted business systems.

Cyber security

91%

Attack-surface review, secure architecture, auth hardening and production-minded controls.

Server management

89%

Linux, MySQL, Apache, Nginx, Caddy, mail services, deployment hygiene and ongoing runtime support.