Freelancer profile translated to English.

Description

A living testament to technical excellence,

codayweb.de is not just a business card, it's the complete portfolio of my technical skills. In just 4 months, I developed an enterprise-level platform that combines state-of-the-art web technologies and meets the highest standards:

Top-Notch Technology

The site is based on React 19 with full TypeScript Strict Mode, Tailwind CSS v4, and React Router v7 for hybrid server-side rendering. Every line of code was written by me, from architecture to implementation.

SEO & Performance: Measurable Perfection

Google Lighthouse Score: 100/100 in all categories. Full Schema.org Markup (JSON-LD), dynamic XML sitemap, Core Web Vitals optimized. Over 40 pages, bilingual (DE/EN) with i18next, 34 translation files, all self-created.

Security & Accessibility as Standard

WCAG 2.1 Level AA compliant, complete Content Security Policy, HTTP Security Headers, input sanitization with Zod, rate-limiting. Security is not an afterthought; it's integrated into the design.

AI Integration & Innovation

Custom-developed website analyzer with Google Gemini API, load balancing across multiple keys, proxy architecture for maximum fault tolerance. Plus: AI Chatbot Widget, lazy-loaded for optimal performance.

Architecture for Scalability

Feature Sliced Design (FSD) with 5-layer architecture, Design Token System, Code Splitting, Custom Hooks. CI/CD pipeline with GitHub Actions, Pre-Commit Hooks via Husky, automated tests with Vitest and Playwright.

Monitoring & Analytics

Sentry for error tracking, custom CUSTOS Security Logger System, Plausible Analytics (GDPR compliant), Lighthouse CI for continuous performance audits.

Visit codayweb.de and experience what modern web development looks like when quality, performance, and security are considered from the start. The site is my manifesto and your insight into what I can achieve for your project.

Languages

German
Native or bilingual
Turkish
Fluent
English
Fluent

Workplace preferences

Can work on-site

Wetzlar (up to 50km)

Lexoffice
Year-End Closing Responsibility
January 2022 - Today (4 years and 5 months)
Management of 50+ client accounts (~180 invoices/year) Bank account integration: Automated payment reconciliation (0 error rate) Automation: Recurring invoices (~5h/month time saving) Cost center management: 5+ simultaneous construction projects Financial reporting: Monthly & annual financial overviews Complete accounting from receipt to annual statement
Kingbill
Accounting, Invoices, Quotes, etc.
January 2023 - Today (3 years and 5 months)
Management of 10+ large projects Customer-specific billing models (15+ scenarios) Time saving: ~60% vs. manual processing for large projects Multi-project cost allocation (machinery, materials, personnel) Financial reporting: Quarterly reporting for stakeholders
Ceram
Accounting, Invoices, Quotes, etc.
January 2024 - Today (2 years and 5 months)
Automatic material list creation (~2h time saving/project) Site reporting: Real-time monitoring vs. budget