"Cem Deniz Demir"

• ▸Replaced full database seeding with a Track-to-Prod incremental delta sync engine (Dem DB), cutting deployment overhead from O(N) to O(1) hardened production through environment isolation and a sandboxed gateway for all production mutations.
• ▸Architected a full-stack order management platform (TT Custom) on Next.js, TypeScript, PostgreSQL, and Prisma with 14 REST API endpoints; secured the full request lifecycle with argon2 hashing, Zod validation, HTML sanitization, httpOnly cookies, IP-based rate limiting, and CORS enforcement.
• ▸Engineered efektanet.com⁠ achieving 40% faster page loads, 35% asset reduction, and 50% faster image delivery through GSAP/Framer Motion optimization and automated WebP conversion on Cloudflare R2 CDN.
• ▸Reduced API query response times by 45% via Prisma schema optimization and index tuning; maintained 99.9% uptime with Playwright E2E suites covering auth flows and API security paths, while architecting a multilingual (TR/EN) platform across 50+ countries.
• ▸Automated the Cloudflare R2 → Firebase pipeline with ETag-diff bucket sync and a cache-hard / purge-precise CDN layer (1-year edge cache + auth-protected per- URL purge-on-upload), replacing a 3-step manual process; deployed a secure admin dashboard (Dem Admin, Next.js 16, Tailwind CSS v4) with Firebase Auth and RBAC.

• ▸Developed bakiciste.com⁠ , a credit-consultancy survey platform enabling secure multi-step data collection with REST API integration and form validation flows.
• ▸Designed and implemented responsive dashboards for an internal office reporting tool, streamlining reporting workflows and reducing manual steps for operations staff.
• ▸Built a reusable Next.js project template with REST API integration patterns, standardizing project setup and improving cross-product consistency.

• ▸Shipped production-ready frontend components and resolved system bugs for internal applications utilizing React, Next.js, TypeScript, and Tailwind CSS, ensuring stable feature delivery.

• ▸Developed a commercial platform on Express.js/MongoDB, optimizing frontend rendering via custom JavaScript.
• ▸Migrated the complete backend to Laravel to leverage its built-in ORM and administrative tools.

• ▸Built simple console applications in C to learn core fundamentals.
• ▸Developed small Java and C# apps with database connections.
• ▸Created Arduino programs in C++ for hardware coursework.

// Next.js | TypeScript | Prisma | NextAuth

• ▸Developed a reusable Next.js + TypeScript template with Prisma and NextAuth for authentication, session handling, and profile management in both server and client components.
• ▸Built safe-parse actions, dynamic login/signup forms, automatic OAuth–credentials account linking, and a chained middleware stack: rateLimiterMiddleware, securityHeadersMiddleware, authMiddleware, loggerMiddleware.
• ▸Implemented nonce-based security headers, environment-driven configuration, and authentication-aware redirects.
• ▸Added profile features for editing data, merging or deleting accounts, and one-click logout.

// Next.js | TypeScript | TailwindCSS | i18n

• ▸Built a frontend-only file system interface with dynamic navigation and backend-linked data via unique IDs.
• ▸Implemented internationalization (i18n) for multi-language support.
• ▸Designed modular components and client-side rendering for performance and scalability.
• ▸Created a clean, responsive UI with TailwindCSS and structured TypeScript code.