Yusuf Emre Derinöz

About

I work on every layer of a product.

I started in cross-platform and native mobile development (React Native, Swift/tvOS). Then I moved into a senior role where I led development and made architecture decisions, and after that I took on full-stack work.

Today I am the sole developer of an AI-powered self-checkout and POS platform at SelfCor. Outside work I build and release my own products under the MYD Hub name.

I usually own a product through architecture, implementation, release and production support. I have worked with companies in Türkiye, the Netherlands, North Macedonia and Switzerland.

Education

BSc Computer Engineering, Süleyman Demirel University, 2017 – 2021

Languages

Turkish native, English B1

Work

Open to remote work and relocation

A multiplayer football trivia game with eight modes, online matchmaking, friend rooms, a daily puzzle and weekly leaderboards. A server-authoritative WebSocket server runs every match.

• Python data pipeline that merges open football datasets and Wikidata into 72,000+ players
• 4,500 puzzle grids generated at three difficulty levels from a popularity score
• Local image pipeline with Stable Diffusion XL, ControlNet and BiRefNet that turns openly licensed photos into illustrated cards
• Server-side verified in-app purchases and rewarded ads, Google and Apple sign-in, push notifications and an admin panel
• Playable in 6 languages, live in 175 App Store regions and on Google Play

• React Native
• Expo
• TypeScript
• Node.js
• Fastify
• WebSocket
• SQLite
• Python
• Stable Diffusion XL
• Docker

A map and community app that rates 2.48 million roads in Türkiye (1.14 million km) for cycling traffic stress.

• Weekly data pipeline that loads OpenStreetMap into PostGIS with osm2pgsql, with vector tiles served by Martin
• Self-hosted Valhalla routing engine for calm-street route planning, suggested loops and map matching
• Two-way sync with Apple Health and Health Connect, with Apple Watch rides arriving in the background
• GPX, TCX and FIT import, community ratings weighted by verified rides, and 4 languages

• React Native
• Expo
• MapLibre
• Fastify
• PostgreSQL
• PostGIS
• Valhalla
• Martin
• Docker

A bilingual (TR / EN) site built with Astro. It has a three.js scene whose camera moves with the scroll and a contact form that sends email through Resend.

• Astro static build with a Node.js adapter for the contact endpoint
• three.js scene written with GLSL shaders, with camera moves in GSAP
• Contact API with a honeypot, a fill-time check and per-IP rate limiting, covered by Vitest tests
• Runs on a VPS with Docker Compose behind a shared Caddy reverse proxy with automatic HTTPS
• One-command deploy that restores the previous Caddy config if the new one fails validation
• GitHub Actions runs typecheck, tests and build on every push

• Astro
• TypeScript
• three.js
• GLSL
• GSAP
• Node.js
• Resend
• Vitest
• Docker
• Caddy
• GitHub Actions

A fast, mobile-first company site for a law and mediation office.

• Next.js 15 static export, React 19 and Tailwind CSS v4
• Hero scene written as a three.js shader, with scroll animations in Motion and Lenis
• JSON-LD structured data (LegalService, Person, FAQPage), llms.txt and IndexNow for SEO and AI search visibility
• nginx in Docker behind Caddy with automatic HTTPS, and symlink-based atomic deploys
• Copy that follows the Turkish Bar’s advertising rules

• Next.js
• React
• TypeScript
• Tailwind CSS
• three.js
• Docker
• nginx
• Caddy

I build every layer of an AI-powered self-checkout and POS platform on my own. It runs live in a pilot store.

• Multi-store cloud API with 190+ endpoints (ASP.NET Core, Dapper, MediatR, SQL Server)
• Offline-first in-store server that keeps selling when the internet drops, with idempotent sync over RabbitMQ using the outbox pattern
• Checkout terminal service on SQLite with refunds, voids, shifts and end-of-day reports
• Windows kiosk app in Blazor Hybrid, integrated with the barcode scanner, scale, camera, receipt printer and bank card terminal
• Camera product recognition with YOLO plus weight checks, and a barcode-match model fine-tuned on DINOv3
• GitHub Actions CI/CD that builds Docker images and installers, with pilot and stable channels, rollback and end-to-end kiosk tests

• .NET 8/10
• ASP.NET Core
• Blazor Hybrid
• Python
• SQL Server
• SQLite
• RabbitMQ
• Redis
• Docker
• GitHub Actions
• YOLO
• PyTorch
• ONNX Runtime

Led mobile development across the Imperum product family and took part in architecture decisions for iOS, Android, tvOS and web.

• Built and shipped the React Native app on the App Store and Google Play
• Built the native Apple TV (tvOS) app in Swift
• Built the React.js web app on the same data model and UI patterns as mobile

• React Native
• TypeScript
• Swift
• tvOS
• React.js
• REST API

Delivered and maintained 7 production React Native apps for clients in Türkiye, Switzerland and the MENA region.

• Ran App Store and Google Play releases, including versioning, store review and post-release maintenance
• Worked in a multi-product codebase on GraphQL / Apollo Client and REST APIs with shared components and state management
• Localized the apps for different languages and markets

• React Native
• TypeScript
• GraphQL
• Apollo Client
• REST API
• Firebase

Built Petroo for iOS and Android with React Native on my own.

• Owned development, store releases and production support end to end
• The product was later rebuilt as a WebView app, so the current store version does not reflect my React Native work

• React Native
• TypeScript
• iOS
• Android

Contact

Write to me about a project or a role.

Email or WhatsApp is the fastest way to reach me. I am open to remote work and relocation.

Email

yusufemrederinoz@gmail.comCopy

Phone

+90 506 374 22 53

LinkedIn

linkedin.com/in/yusuf-emre-derinöz