available for hire · Germany

Eyup
Cimen.

Senior iOS Developer with 12+ years of experience building production-grade mobile applications — from fintech superapps to augmented reality. Now also building AI-powered automation systems and vibe-coding products with LLMs.

● Open to work No notice period 📍 Weil der Stadt, BW 🇩🇪 Work permit ✓ Swift · SwiftUI · Objective-C
→ Contact me GitHub ↗
12+
years experience
15+
apps shipped
99.8%
crash-free rate
5+
industries
01

Technical Skills

Swift expert
SwiftUI expert
UIKit expert
Objective-C expert
MVVM / VIP / MVC expert
Protocol-Oriented Programming expert
Swift Package Manager advanced
Async/Await · GCD advanced
ARKit · RealityKit advanced
Firebase · Crashlytics advanced
RxSwift · Combine advanced
Realm · CoreData advanced
REST API · GraphQL advanced
Bitrise CI/CD advanced
n8n Automation advanced
Next.js · TypeScript intermediate
Supabase · pgvector intermediate
LLM Prompt Engineering advanced
Claude API · OpenAI API advanced
Vibe Coding / AI-assisted dev advanced
02

Experience

Ozan SuperApp
Senior iOS Developer
Apr 2022 — Jun 2023 Istanbul, Turkey
SwiftUI MVVM Swift Package Manager Firebase Alamofire Bitrise CI/CD
  • Implemented 8 major features — Hotel Booking, Ticket Buying, Bill Payment, Gaming, Split Payment, Cashback, and ReceiptScan — using SwiftUI.
  • Modularized the project with Swift Package Manager, improving app performance by 20% and reducing build time by 30%.
  • Optimized CI/CD with Bitrise and conducted code reviews, lowering production bugs by 17%.
  • Applied Protocol-Oriented Programming and MVVM architecture throughout.
Roofstacks
Senior iOS Developer
Oct 2021 — Apr 2022 Istanbul, Turkey
Clean Swift (VIP) RxSwift Realm Firebase Crashlytics Moya
  • Developed and released Bilet Dukkani, a low-cost flight ticket purchasing app.
  • Introduced the Wallet feature, speeding up ticket purchasing by 35%.
  • Integrated Google Analytics for business team, improved app review cycle by 23%.
  • Eliminated crashes and memory leaks using Firebase Crashlytics — boosted app performance by 11%.
Ipucu Software
Senior iOS Developer
Dec 2020 — Oct 2021 Istanbul, Turkey
XMPP Protocol Realm Multithreading / GCD POP / OOP
  • Built a real-time messaging module (similar to WhatsApp/Signal) inside Fups, a payment application, using XMPP Protocol.
  • Introduced Realm database — achieved 45% faster message loading time.
  • Integrated in-chat financial features: send/request money, family accounts, shared payments.
  • Used Multithreading (GCD, Operation Queues, async tasks) for smooth performance.
Globme
Senior iOS Developer
Mar 2020 — Dec 2021 Istanbul, Turkey
MVVM GraphQL Moya Firebase NFC / BLE / QR AVFoundation
  • Developed Idenfit — a cutting-edge HR management application with attendance, shifts, leaves, and advances modules.
  • Implemented Bluetooth, NFC, QR, and RFID-based employee identification technologies.
  • Built Task App & Audit App from scratch — task creation, worker assignment, inspection flows.
  • Optimized performance using Multithreading (GCD, Serial/Parallel queues).
Leo AR
Senior iOS Developer · Remote
Oct 2019 — Mar 2020 San Francisco, USA
ARKit RealityKit Motion Capture API React Native
  • Added Motion Capture feature to an Augmented Reality app — recorded ~60 million dance movements in the database.
  • Integrated the native ARKit module into a React Native main project seamlessly.
Medyasoft Digital
Senior iOS Developer
Jan 2019 — Oct 2019 Istanbul, Turkey
Auto Layout Performance Optimization iPad / iPhone
  • Developed multiple modules for Turkish Airlines Cargo Portal (COMIS).
  • Optimized memory leaks, improved app performance by 21%. Universal iPhone/iPad support.
  • Contributed to Turkish Doco (Turkish Airlines Meal Reporting) — 25% faster operations.
Odeal
Senior iOS Developer
Jan 2018 — Dec 2018 Istanbul, Turkey
MVC Crashlytics Fintech
  • Enhanced stability of the financial application by 30%. Added financial features.
  • Raised Crash-Free user rate from 86% → 99.8% as reported by Crashlytics.
Pordiva Mobile System
iOS Developer
Jul 2016 — Dec 2017 Istanbul, Turkey
Swift Objective-C XMPP Realm MVC
  • Built Viatori (social media) — photo/video sharing, location, messaging via XMPP. Realm gave 55% faster message loading.
  • Contributed to ETA (cargo bid app), Fenerbahçe SK social app (Objective-C), CocaCola One Team event app.
  • Developed Turkish Airlines Skylife Magazine from scratch in 3 months — Mapbox SDK, offline maps with Realm, push notifications via OneSignal.
  • Built Isim Tescil (domain purchasing app) from scratch in 1 month — Objective-C.
Freelance
iOS Developer
Apr 2012 — Jul 2016 Samsun, Turkey
Objective-C MVC App Store
  • Built multiple independent apps: Patient Tracking, Radio App, Online Exam, Pictionary Diary.
  • Foundation of a 12-year career in native iOS development.
03

AI & Automation Projects

⚡
n8n AI Content Pipeline
End-to-end YouTube content automation — from AI video generation (Veo3, Sora) to auto-upload. Includes hook analysis with OpenAI Vision and multi-sheet Google Sheets queue management.
n8n Veo3 / Sora OpenAI Vision Google Sheets
🔍
LegalVector — Lawyer Knowledge Portal
RAG-powered legal knowledge base. Lawyers upload documents, users ask questions — Claude answers with source citations. Built with pgvector for semantic search.
Next.js Supabase pgvector Claude API
🤖
Vibe Coding & AI-Assisted Development
Using Claude, Cursor, and LLM APIs to build full products at speed. Iterative prompt engineering, structured output parsing, multi-agent workflow design.
Claude API Cursor Prompt Engineering MCP
🏢
Antigravity — Automation Agency
Founder of Antigravity, providing AI-powered automation services to businesses. Focus on content pipelines, workflow automation, and custom LLM integrations.
n8n LLM APIs Business Automation
04

Education

BSc Applied Physics
Kahramanmaraş Sütçü İmam University
2003 – 2008
05

Contact

Email cmneyp@gmail.com X / Twitter @eyupcimen GitHub github.com/eyupcimen
Location Weil der Stadt, DE 🇩🇪
Work Authorization Residence + Work Permit ✓
Availability Immediate · No notice period