Mert
Gaygusuz.
Full-Stack Mobile Developer
Full-Stack Developer specializing in React Native and native iOS (Swift/SwiftUI), rooted in 2+ years of .NET back-end — independent developer of multiple iOS apps on the App Store.
Tools I build with
A product-focused stack across native mobile, reliable systems, and AI tooling.
Mobile & product
Mobile
Frontend
Systems
Languages
Backend
Databases
Architecture
AI & workflow
AI & Tools
Where I’ve worked
From .NET back-ends to shipping mobile products.
Indie iOS Developer
Self-employed · Remote
- Build independent mobile apps for the App Store using SwiftUI and modern iOS technologies, taking ownership across product strategy, UI/UX, development, testing, App Store release, and marketing.
- Shipped Zynkra, Blip, FocusReceipt, and Jotly. Zynkra combines a native SwiftUI/Combine client with a real-time SignalR + ASP.NET Core / EF Core / PostgreSQL backend, synchronized media playback via AVPlayer and the YouTube IFrame API, and StoreKit 2 subscriptions.
- Work actively with SwiftUI, SwiftData, CloudKit, Firebase, RESTful APIs, real-time synchronization, StoreKit, MVVM/Clean Architecture, localization, and App Store optimization—focusing on clear product design, high-performance mobile architecture, and release-ready quality.
Full-Stack Developer (React Native & .NET)
F4e · Istanbul
- Spearheaded the web-to-mobile transformation of the AI-powered F4e workforce performance management platform, building high-performance cross-platform (iOS/Android) interfaces using React Native.
- Architected mobile integration of backend services, managing data synchronization and complex data flows via REST APIs.
- Developed new features and bug fixes on the .NET/C# backend; contributed to front-end tasks as part of a full-stack workflow.
- Built an NL2SQL Agent from scratch — translating natural language queries into SQL — and integrated it directly into the core application.
.NET Back-End Developer
Vendrops Technologies · Istanbul
- Architected the backend of a 10+ module SaaS facility management platform; developed over 100 secure RESTful endpoints using .NET, C#, and ABP Framework.
- Integrated MongoDB (NoSQL) and Redis (Caching) to scale data management and optimize system performance.
- Supported the Front-End team using Angular/TypeScript.
IT Support Intern
hepsiemlak · Istanbul
- Optimized end-user system performance by performing hardware upgrades (RAM/SSD) and operating system configurations.
Mobile Application Development Workshop
Tech Istanbul (IMM)
Successfully completed a 12-hour hands-on mobile application development training.
Things I’ve shipped
Zynkra
A social entertainment app where users listen to music and watch videos together in live, synchronized rooms; the "Vibe Radar" surfaces people in the same mood for anonymous chats — without revealing identity. Built a native Swift/SwiftUI/Combine client on a real-time SignalR + ASP.NET Core / PostgreSQL backend, with synchronized playback via AVPlayer & the YouTube IFrame API and subscriptions through StoreKit 2. Published on the App Store.
Live on the App Store
Blip
A social iOS app where users post anonymous thoughts, questions, and short updates, review incoming replies, and accept ones to start anonymous chats around trending topics. Built with MVVM and the repository pattern in Swift/SwiftUI/Combine, with Firebase Auth, Cloud Firestore, Sign in with Apple, and a custom design system. Published on the App Store.
Live on the App StoreNewsFlow
A full-stack news aggregation platform using .NET 10 Clean Architecture (CQRS/MediatR) on the backend and Next.js 15 with TypeScript on the frontend, featuring real-time headlines stored in PostgreSQL.
Explore Project↗AI-Powered SQL Agent
An AI assistant that translates natural language queries into MS SQL Server statements using a dual-chain LangChain architecture with Google Gemini 2.5 Flash — first generating the correct SQL, then producing a human-readable response. In-memory schema caching (Turbo Mode) cut response time by 80%, with SELECT-only access enforced for production safety.
Explore Project↗
FocusReceipt
A local-first iOS productivity app that converts daily activities, focus sessions, energy levels, and notes into a shareable daily receipt summary. Full CRUD activity tracking with weekly insights and visual analytics via the Charts framework. Published on the App Store.
Live on the App Store
Jotly
A minimal, local-first iOS thought journal for quickly capturing ideas, tasks, and notes. Features category-based organization and a personal timeline view for revisiting past entries, built with Swift/SwiftUI/SwiftData and MVVM. Published on the App Store.
Live on the App StoreEducation
Management Information Systems (AOF)
Anadolu University
10/2022 – Present
Computer Programming
Altınbaş University
10/2018 – 06/2020
Let’s build something together.
I'm open to new opportunities and interesting mobile projects. Have a vision — or just want to talk iOS & React Native? I'm all ears.