Independent web developer

Secure web systems.

For companies that need one specialist to handle development, cyber security and maintenance without bouncing between multiple vendors.

Core stack

PHP / CI4 / AI

Focus

Web + Security

Working mode

Remote / Hybrid

Editorial illustration representing an independent cybersecurity and full-stack specialist at work

Positioning

Independent specialist

Hands-on delivery instead of delegation-heavy agency layers.

Service mix

PHP + AI + security

One partner for development, hardening and server-side follow-through.

Typical work

Custom software, e-commerce, maintenance

Best fit for teams that need practical execution and direct support.

Core services

Core services, clearly scoped.

The service lines stay practical: choose the stack or problem area that fits best, then move quickly into implementation or maintenance.

Backend development illustration with application panels, code structure and workflow blocks

PHP / CodeIgniter 4

Backend systems, admin panels and business workflows built with clean CodeIgniter 4 structure and production-minded PHP.

PHPCodeIgniter 4Backend
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AI systems illustration with workflow graphs, model nodes and operational dashboards

AI

Advanced AI applications, LLM workflows, fine-tuning strategy and automation systems for product operations, cyber security and marketing execution.

AILLMAutomation
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Custom software illustration with dashboards, workflow cards and modular application blocks

Custom Software

Bespoke business systems, portals and workflow tools shaped around the way your team actually operates.

Custom SoftwarePortalsWorkflow Automation
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Security review themed illustration with secure portal and monitoring panels

Cyber Security

Practical security reviews and hardening for authentication, permissions, attack surface and runtime exposure.

OWASPThreat ModelingSecure SDLC
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E-commerce illustration with storefront, order management and product catalog views

E-commerce

Storefronts, catalog flows and operational improvements for e-commerce systems that need to stay reliable, manageable and secure.

E-commerceStorefrontOperations
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Platform engineering illustration with proxy layers, databases, mail services and operational dashboards

Server Maintenance

Server setup, maintenance and hardening for Linux-based workloads covering MySQL, Apache, Nginx, Caddy, mail services and deployment operations.

Server MaintenanceLinuxMySQLNginxApacheCaddyMail Server
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Selected cases

Selected work.

These case snapshots are written to show method, decision quality and technical range rather than inflated marketing claims.

Threat surface portal illustration with asset inventory and issue triage views

2026

Threat Surface Portal

An internal portal to unify visibility across domains, issues and externally exposed systems.

SecurityPlatformInternal Tooling
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Bilingual SaaS product marketing illustration with multilingual screens

2025

Bilingual SaaS Rebuild

A multilingual marketing and onboarding rebuild designed to improve trust, content velocity and launch readiness.

GrowthMarketing SiteLocalization
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How I work

How I work.

I usually enter at the point where trust is low, deadlines are real and someone needs to own both the implementation and the tradeoffs.

01

Diagnose what actually matters

I start by collapsing noise into the handful of risks, blockers and opportunities that truly affect launch quality.

02

Design the narrowest effective solution

Instead of adding layers, I shape a path that improves speed, trust and maintainability with minimal waste.

03

Ship with operational discipline

The output is expected to be measurable, deployable, documented and ready to survive real usage.

Portrait-style placeholder illustration for Serhan Yildiz personal brand section

About the builder

Direct, not bloated.

That means tighter communication, fewer handoffs, clearer accountability and a stronger link between technical decisions and business outcomes.

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

PHP, CodeIgniter 4 and AI delivery
Custom software and e-commerce systems
Cyber security reviews and server operations
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Primary goal

Need direct technical support?

The fastest next step is a focused conversation around the stack you use, the business need and where the current friction lives.

Latest insights

Short technical notes.

The blog feed is still mock-backed, but its structure is already ready for CMS migration and SEO growth.

Security2026-03-19

Zero-trust delivery habits

How consent, secret handling and review gates influence launch quality beyond surface-level checklists.

Engineering2026-02-14

Bilingual Next.js structure

Practical patterns for routes, metadata and future CMS migration when the site has to convert and scale.

DevOps2026-01-08

Lean Docker images

Why smaller runtime surfaces and clearer health checks make paid-traffic launches less stressful.