Deniz Eren G.

7+ years building mobile and web apps for clients across five continents. I co-run a small two-person studio, so you get senior hands on your project, not a junior hiding behind a flashy agency profile. Most of what clients hire me for falls into three buckets: 1) SHIPPING APPS PEOPLE ACTUALLY USE I've built and launched products that are live right now on the App Store and Google Play. For one wellness brand, I built the gamification system and an AI meal-scan feature, then localized the app for the Japanese market. It now has 40,000+ users across 10+ countries. I also took a research SaaS from an empty repo to a paid product running on Stripe. 2) GETTING STUCK APPS UNSTUCK A lot of people come to me with an app that got rejected in review: broken IAP or subscription setup, metadata problems, data-disclosure policy flags. I've turned those rejections into approvals more times than I can count. If your build is sitting in Apple or Google limbo, this is the thing I'm genuinely good at. 3) AI THAT SHIPS, NOT AI THAT DEMOS I integrate OpenAI, Claude, and Gemini into real features like meal analysis, smart chat, content generation, and recommendations, and I build the backend so it stays fast and doesn't burn through your token budget. TECH I WORK IN DAILY Mobile: Swift/SwiftUI, Kotlin/Jetpack Compose, React Native & Expo Web: Next.js, React, TypeScript, Tailwind Backend: Node.js, Firebase, Supabase, Postgres AI: OpenAI, Claude, Gemini Plus the unglamorous parts that decide whether an app actually succeeds: App Store and Play submission, compliance, IAP and subscriptions, ASO, and ad monetization. HOW I WORK Clear updates, honest timelines, and I'll tell you when something's a bad idea instead of just billing for it. I use modern AI coding tools like Claude Code and Codex as part of my workflow, which means I ship faster without cutting corners, since every line still goes through a senior developer who knows what good looks like. Send me what you're building and what's blocking you, and I'll tell you straight whether I'm the right fit.