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I'm a mobile and full-stack developer with 3+ years of experience building and shipping cross-platform apps. I specialize in React Native (Expo & CLI) with production-level expertise in authentication, real-time backends, and scalable UI architecture. Independently developed and published two consumer apps on Google Play and the Apple App Store, gathering real user feedback and iterative release cycles. I'm comfortable across the full stack—from mobile UI to serverless backends—focusing on clean code, performance, and user-centered design.…I'm a mobile and full-stack developer with 3+ years of experience building and shipping cross-platform apps. I specialize in React Native (Expo & CLI) with production-level expertise in authentication, real-time backends, and scalable UI architecture. Independently developed and published two consumer apps on Google Play and the Apple App Store, gathering real user feedback and iterative release cycles. I'm comfortable across the full stack—from mobile UI to serverless backends—focusing on clean code, performance, and user-centered design.

Ziya Özgül

Web Developer, Front-End Developer, Back-End Developer, +3

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I'm a mobile and full-stack developer with 3+ years of experience building and shipping cross-platform apps. I specialize in React Native (Expo & CLI) with production-level expertise in authentication, real-time backends, and scalable UI architecture. Independently developed and published two consumer apps on Google Play and the Apple App Store, gathering real user feedback and iterative release cycles. I'm comfortable across the full stack—from mobile UI to serverless backends—focusing on clean code, performance, and user-centered design.…I'm a mobile and full-stack developer with 3+ years of experience building and shipping cross-platform apps. I specialize in React Native (Expo & CLI) with production-level expertise in authentication, real-time backends, and scalable UI architecture. Independently developed and published two consumer apps on Google Play and the Apple App Store, gathering real user feedback and iterative release cycles. I'm comfortable across the full stack—from mobile UI to serverless backends—focusing on clean code, performance, and user-centered design.

Available to hire

I’m a mobile and full-stack developer with 3+ years of experience building and shipping cross-platform apps. I specialize in React Native (Expo & CLI) with production-level expertise in authentication, real-time backends, and scalable UI architecture.

Independently developed and published two consumer apps on Google Play and the Apple App Store, gathering real user feedback and iterative release cycles. I’m comfortable across the full stack—from mobile UI to serverless backends—focusing on clean code, performance, and user-centered design.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Turkish

Fluent

English

Advanced

Work Experience

Mobile Developer at Nixara – AI Medium & Birth Chart App

January 1, 2023 - Present

Developed and published a cross-platform AI-powered astrology app using React Native + TypeScript; implemented multi-language localization; integrated AI features (natal chart generation, tarot, palm reading, dream interpretation, AI medium chat powered by GPT-4o and Anthropic APIs); migrated subscription flow from RevenueCat to Adapty; built back-end with Convex and Clerk for secure authentication.

Mobile Developer at Shapely – AI Text Transformation App

January 1, 2024 - Present

Scaffolded and architected a cross-platform AI writing tool that rewrites text for specific platforms using GPT-4o; implemented a dual-theme design system and 5-language internationalization; integrated Firebase Auth + Firestore and Adapty subscription management for freemium monetization.

Mobile/Web Software Engineer (POS System) at BITES Defence & Aerospace

January 1, 2023 - January 1, 2023

Built a full-featured point-of-sale system for a cafe using Electron + React + Vite with offline-first architecture; implemented table and stock management, and a QR web menu (Next.js); released a mobile staff app for taking orders.

Embedded Software Engineer at Takosan Automotive

January 1, 2022 - January 1, 2023

Developed embedded C software for automotive display systems, controlling indicator logic and motor driver modules; worked with microcontrollers and UART/SPI/I2C peripherals; performed hardware–software integration testing and reduced firmware defects; improved maintainability with refactoring and inline documentation.

Freelance Web Developer at Fiverr - Upwork

January 1, 2021 - January 1, 2023

Delivered full-stack web applications for multiple clients using React, Next.js, Tailwind CSS, and MongoDB; designed and developed Kaftek Mühendislik’s website; implemented animations, responsive layouts, and client branding; managed end-to-end project lifecycle from requirements to deployment.

Mobile Developer at Nixara

January 1, 2023 - Present

Developed and published a cross-platform AI-powered astrology app using React Native + TypeScript; localized to 9 languages; integrated natal chart generation, tarot, palm reading, dream interpretation; AI medium chat powered by GPT-4o and Anthropic APIs; migrated subscription infrastructure from RevenueCat to Adapty; achieved Google Play listing and completed full Apple App Store review cycle; built backend with Convex for real-time queries and Clerk for secure authentication.

Mobile Developer at Shapely

January 1, 2024 - Present

Scaffolded and architected a cross-platform AI writing tool that rewrites text for specific platforms using GPT-4o; implemented dual-theme design system (dark/light) and 5-language i18n support; integrated Firebase Auth + Firestore and Adapty subscription management for a freemium monetization model.

Mobile Developer at BITES Defence & Aerospace

January 1, 2023 - December 31, 2023

Built a custom video playback module from scratch in React Native, replacing a third-party dependency and reducing bundle overhead; implemented media controls, playback state management, and modular UI components used across multiple screens; integrated WebView rendering for dynamic embedded content, handling edge cases across Android and iOS; identified and resolved performance bottlenecks in component re-renders, improving scroll smoothness on lower-end Android devices. Management System (Electron + React + React Native) — Building a full-featured point-of-sale system for a café using Electron + React + Vite with offline-first architecture (sql.js local DB + Supabase cloud sync); features include table management, order tracking, product/stock management, and reporting, packaged with NSIS installer and portable .exe via electron-builder; Companion QR web menu (Next.js) enables customers and waitstaff to browse and place orders from their own devices; mobile app released for staff