Çağdaş Kemik

Core engineer on a multi-tenant travel SaaS. Built and operate an AI agent platform and the products it delivers, under company branding.

• Remain accountable for the AdviceAI product family, a Vue/NestJS modular monolith serving the full digital needs of Turkish travel agencies and hotels, and implemented 3D Secure payments across 6+ Turkish banks with atomic payment state and a PCI-DSS compliant architecture.
• Designed and operate an agent-orchestration control plane over Tailscale/mTLS that manages persistent Claude, Codex, Cursor and Gemini CLI sessions, with mission pipelines, human approval gates, model- and cost-aware routing, usage quotas, voice control and mobile monitoring.
• Applied agent fleets to real product work, including supplier-contract integration, finance audits, call-center issue triage, regression testing and deployment automation, while owning the resulting production code myself end to end.
• Integrated legacy XML travel suppliers behind anti-corruption adapters and shipped catalog, pricing, booking and media pipelines to SSR B2C storefronts with CMS-driven components and partner theming; route-level splitting and bundle reduction cut page loads by 40%+.
• Built and operate mixifin.com as the sole engineer, from architecture and API to UI, deployment and monitoring; live in production under the company platform.

Stack: Claude Code · Codex CLI · Cursor · Gemini · MCP · tmux · TypeScript · NestJS · Vue · React · Go · Docker · Redis · MongoDB · Playwright · Vitest

Delivered client products end to end for companies in CH, UK, TR and more, and built the engineering habits I later encoded into agentic workflows.

• Shipped SEO-optimized booking, brand and e-commerce sites for Swiss and Turkish companies, a map-first event discovery platform covering 35+ countries, and LLM-powered product experiments such as an ingredient-to-recipe generator.
• Built custom CMS backends on PocketBase and Firebase with real-time preview, auto-save drafting and role-based access control; integrated Instagram Graph API, AWS SES and XML tourism APIs with retry and error-handling strategies.

Stack: TypeScript · Node.js · Next.js · Astro · OpenAI APIs · AWS · Vercel

Built manufacturing execution software at an OEM automotive supplier producing oil pumps for Porsche and BMW.

• Developed the Change Application Plan (CAP) Wizard on the sMES platform, used by 13 managers and 500+ white and blue collar personnel, contributing to a 60%+ operational-efficiency gain.
• Refactored a legacy n-tier codebase with Entity Framework, optimized MSSQL stored procedures for 15% faster processing, and integrated Canias ERP data synchronization with transactional integrity.
• Improved companies' bespoke DevExpress components with various new functionality, utilizing hooks and callbacks along with new views.

Stack: .NET · MSSQL · DevExpress · Entity Framework · Canias ERP · MES

Automated a manual menu-management workflow for municipal facilities.

• Centralized 1,000+ items and cut update effort by more than 50% with a QR menu system.

Stack: JavaScript · Web APIs · SQL