Cem Bilen
Software Engineer
Full-stack · AI-native
Izmir, Türkiye
LinkedIn: https://linkedin.com/in/cxbilen
Portfolio: https://cxbilen.com
GitHub: https://github.com/CXBilen
Summary
Software engineer with a foundation in computer programming and databases. I build full-stack web products, desktop tools and realtime applications, including AI integrations. My AI-native workflow combines Codex and Claude Code with architecture, typed contracts, code review and automated testing. UX, design systems and conversion optimization inform my engineering decisions.
Technical Skills
- Technologies & tools
- TypeScript / JavaScript, React, Next.js, Node.js, Bun / Electron, PostgreSQL / SQL, Redis, Supabase, WebRTC / WebSocket / Socket.IO, Google Gemini API, Tailwind CSS, Git / GitHub, Playwright / Vitest, Codex / Claude Code, Figma, GA4 / Funnels
- Engineering & product
- Frontend Development, Backend Development, API Integration, Data Modeling, AI-assisted Development, AI API Integration, Realtime Applications, Test Automation, UX / UI Design, Design Systems, CRO / A/B Testing, Product Thinking
Projects
Surfel
SaaS in development: Next.js/TypeScript monorepo, PostgreSQL data models, role-based access, APIs, webhooks and background jobs.
cxbilen.com
Live Next.js/TypeScript portfolio with reusable UI components, shared-source PDF/DOCX CV exports, component tests and browser checks.
Dev Migration Assistant
Released Electron/React desktop tool for Git working state and AI context migration; typed IPC, encrypted archives and checksum-verified restore.
PlayAgain
Browser gaming application with Next.js, WebRTC, WebSocket and Redis; phone controllers, QR room pairing and save-state APIs.
Looplift
Next.js/Supabase beta for AI-assisted conversion audits; versioned experiment patches, human approval, measurement guardrails and rollback.
Maestro
AI execution workspace with Next.js, Bun workers, PostgreSQL and Redis; typed job lifecycle, streamed output and artifact review.
SkyWise
Next.js/React travel-assistant case study with typed interaction flows, rule-based intents and simulated service integrations.
LENZ
Live virtual try-on product using Next.js, Supabase and Gemini image-generation APIs; merchant authentication, rate limits and usage tracking.
ZEDrift
Browser driving game with React/Three.js rendering, drift physics, Socket.IO multiplayer and PostgreSQL/Prisma account persistence.
Experience
Senior UX Engineer
Efsora Labs
Feb 2026 – Jul 2026 · Türkiye
Led UX engineering and design systems across SaaS and web flows. Translated product requirements into user journeys, prototypes and implementation specifications, and standardized a design system of 40+ components.
Senior CRO Executive
Digital House
Mar 2025 – Jan 2026 · Istanbul
Owned CRO and UX for web and e-commerce, turning funnel analysis into prioritized A/B tests that lifted conversion +12% and reduced checkout drop-off −16%.
UX/UI Designer
Eva
Sep 2023 – Aug 2024 · Izmir
Designed end-to-end SaaS interfaces and Figma prototypes, simplifying complex flows into clear workflows and improving task-success in usability tests by +20%.
Designer Project Manager
innoscripta AG
May 2023 – Jul 2023 · Berlin
UX/UI Designer
StudioMoco
Dec 2022 – May 2023 · Nuremberg
CRO Executive
Hype
Apr 2022 – Sep 2022 · Istanbul
Web Developer
İnce Fikirler
Mar 2019 – Feb 2020 · Izmir
Education
Associate's, Computer Programming
Izmir University of Economics
2014 – 2016
Software development, web programming and database fundamentals.
Database Interactive Programming
Ç. Altan Anatolian Technical HS
2010 – 2014