Orkun – React Native, React, Typescript

End-to-end IoT device control platform built from scratch, combining mobile, backend, and admin interfaces. Orkun designed and developed comprehensive solution for VFLEX device configuration, voltage control, and real-time MIDI communication.

• Architected and delivered complete IoT ecosystem from scratch: React Native mobile app, NestJS backend API, and React admin dashboard for VFLEX device management;
• Shipped production applications to App Store, Play Store, and web with automated CI/CD using GitHub Actions and EAS Build;
• Implemented real-time MIDI communication for direct device-to-mobile control and configuration;
• Built offline-first mobile architecture with Firebase (Auth/Firestore/Storage) integration and bilingual support;
• Developed RESTful API with Swagger documentation and Firebase Admin SDK for secure authentication;
• Created modern admin UI with Radix UI, Tailwind CSS, and TanStack Query for efficient data management;
• Established automated deployment pipelines across iOS, Android, and web platforms;
• Delivered type-safe, production-ready codebase using TypeScript throughout entire stack.

FitQoach is a next-generation fitness and nutrition platform powered by an advanced multi-agent system built with the OpenAI Agents SDK. Instead of a traditional chatbot, FitQoach uses specialized AI agents that collaborate in real time to understand user intent, analyze data, and take meaningful actions. A central Triage Agent intelligently routes requests to domain experts such as the Terra Health Agent for wearable data insights, the Workout Agent for training plan adjustments, and the Nutrition Agents for food logging, meal planning, and personalized recommendations. Each agent operates with deep context through vector-store semantic search, profile-aware reasoning, and structured tool execution. Conversations seamlessly maintain memory across turns, enabling AI to modify workouts, regenerate entire plans, analyze sleep or recovery, or suggest meals—automatically and safely.

• Architected multi-agent AI system from scratch using OpenAI Agents SDK with intelligent Triage Agent routing requests to specialized domain agents (Terra Health, Workout, Nutrition), enabling complex task orchestration and seamless agent handoffs with context preservation;
• Implemented semantic search infrastructure with OpenAI Vector Store for natural language querying of health data, converting structured wearable device data into searchable embeddings, and enabling conversational access to biometric history;
• Built AI-powered training and nutrition plan generation using Google Gemini 2.5 Flash and OpenAI GPT-4o with structured output parsing, dynamic plan regeneration based on user requests, and context-aware modifications;
• Developed AI vision-based food recognition system for photo-based nutrition logging with automatic macro calculation, recipe analysis, and portion estimation using multimodal AI models;
• Created intelligent conversation memory system maintaining context across chat sessions, formatting message history for agent consumption, and enabling multi-turn interactions without user repetition;
• Engineered AI-driven progression suggestion system analyzing workout performance to generate personalized recommendations with acceptance/rejection workflows and historical tracking;
• Designed tool execution framework for AI agents with 15+ custom tools including workout plan updates, food logging, health data search, and plan regeneration with user approval guardrails;
• Developed full-stack application as sole developer including React Native mobile app (iOS/Android), Node.js/Express backend, Firebase infrastructure, and complete UI/UX design.

Klyft is an innovative AI-powered platform designed to offer personalized fitness and wellness coaching. It combines advanced AI models with real-time wearable integrations, providing users with a comprehensive digital personal trainer, nutritionist, and wellness coach experience.

• Spearheaded the development of scalable architecture using NestJS and React Nativel;
• Integrated AI models like GPT-5 and Vertex AI for personalized guidance and ensured seamless connectivity with wearables through Terra.

Cross-platform mobile health application and content management system for specialty tinnitus practice serving patients with moderate to severe tinnitus. Delivered complete solution enabling personalized, evidence-based care by Doctors of Audiology with 85%+ patient-reported improvement rates.

• Built a cross-platform Expo React Native mobile app from scratch, delivering full functionality on both iOS and Android;
• Designed and implemented the end-to-end UI/UX independently, ensuring a clean, intuitive user experience aligned with health app standards;
• Developed a Node.js and Express back end, integrating authentication (Supabase Auth) and secure API endpoints;
• Implemented a custom admin dashboard and local CMS system to streamline content management and improve operational efficiency;
• Integrated Stripe payment processing for secure and seamless subscription and billing workflows.

A mobile entertainment app that helps users impress on dating platforms by generating witty messages and realistic profile photos using OpenAI and Stable Diffusion. Built with React Native (Expo), Firebase, and TypeScript, it offers a smooth, AI-powered chat experience, lifelike image generation, and seamless mobile performance.

• Designed, developed, and launched an entertainment dating assistant app from scratch to the App Store within three months, leveraging OpenAI for conversational AI and Stable Diffusion for realistic image generation;
• Built a real-time chat experience with AI-powered assistance, enhancing user engagement and retention through dynamic conversations and lifelike visuals;
• Integrated RevenueCat for seamless in-app purchases and subscriptions, while independently handling App Store Optimization (ASO) and Apple Search Ads (ASA) for monetization and visibility. Managed a small design team and led all UI/UX efforts, delivering a polished, intuitive experience with a focus on mobile usability and performance;
• Achieved strong early traction on the App Store, driven by optimized marketing, viral appeal, and fast iteration cycles as a solo founder and full-stack developer.

A mobile-first platform that helps EV charging installers plan, estimate, and propose charging station projects in the field. The mobile app allows users to map sites, capture media, design layouts, and generate estimates, all from one intuitive tool.

• Rebuilt the entire mobile app from scratch, replacing a sluggish sync-based system with Supabase Realtime, enabling smooth, instant collaboration;
• Led a full UI/UX overhaul, applying design best practices for cleaner visuals and better usability in the field.
• Upgraded all outdated libraries and frameworks to modern standards, boosting performance, reliability, and developer velocity;
• Proposed and implemented new mobile features based on installer workflows and real-world feedback;
• Delivered a production-ready mobile experience that significantly improved user satisfaction and team efficiency.

One of the biggest betting sites within New Zealand.

• Utilized Feathers.js and PostgreSQL to optimize the core functions of the website, ensuring speed and scalability for a large user base.
• Developed efficient data handling systems for the website.
• Designed and implemented the front end using Next.js.
• Integrated a real-time chat feature similar to Twitch chat.
• Managed the deployment of the application on AWS.
• Leading a team of 10 devs for developing games within the platform
• Part of games development process with React and Nest.js

One of the fastest growing AI mobile app startups within Turkey

• Managed the technical team;
• Interviewed & onboarded new candidates;
• Was in charge of end-to-end development of apps: including preparation of AI models, backend, deployment in cloud, dockerization, mobile app development, release of mobile apps, tracking of user activity, basically everything;
• Helped with ideation & planning;
• Created sustainable production within the company to make sure every onboarded developer will reuse company components instead of duplicating them from scratch;
• Created company-wide templates for mobile, backend, AI, Docker etc.

Product is harnessing the power of Earth observation technology to bring comprehensive geospatial data and analytics to your fingertips, simplifying the complex and making the world’s information not just available but also understandable for all.

• Played a pivotal role in both high-level and intricate technical tasks;
• Was responsible for creating complex components in React Native that were vital across multiple screens, demonstrating his expertise in abstracting logic for better maintainability and testability;
• Was instrumental in creating a mobile app for satellite images, requiring a deep understanding of mapping technologies like Google Maps and MapBox;
• Established the release process from the ground up using AppCenter, TestFlight, and Google Play Store, facilitating both pre-release beta testing and live customer deployment. This process ensured a seamless delivery of updates and a streamlined release pipeline;
• Created comprehensive post-mortem reports and delivered instant feedback and bug fixes, ensuring the robustness of the systems;

Along with his main tasks, Orkun also worked on a special project to develop a customer service assistant using AI. This project involved using some of OpenAI's technologies. Even though it wasn't released to the public, it was a great chance for him to learn more about AI and machine learning. He got hands-on experience with AI tools, especially in understanding how AI can help in customer service, which really added to his skills.

One of his notable achievements was creating a feature that was featured as the #1 post on Hackernews. This showcases his ability to not only solve complex challenges but also deliver impactful and innovative solutions.

Web and mobile app for helping customers to receive and deliver stuff easily with cost optimization.

• Led the charge to rewrite an outdated Frontity React app using pure React;
• Boosted the app’s speed and responsiveness by adopting cutting-edge tools like React Query;
• Introduced new features, improved the design, and ensured everything was delivered on schedule;
• Integrated WooCommerce and WordPress and worked with a Node.js backend;
• Integrated Klarna for payment processing.

Yoga for health care mobile app.

Initially handling both backend and mobile, Orkun single-handedly rewrote and released the legacy mobile application using React Native and TypeScript.

• Integrated Firebase authentication, including Google and Apple auth;
• Transitioned to a pure mobile role after the backend developer joined the team;
• Bridged the app with a Django backend, utilized Microsoft AppCenter for streamlined builds and deployments, and worked closely with design teams using Figma to deliver pixel-perfect UI/UX.

A simple mobile app that combines OpenAI's language AI with Dalle's image creation to help users make and visualize creative prompts easily. Great for anyone wanting to quickly turn ideas into images.

• Single-handedly created the entire architecture, both front-end and back-end, ensuring a robust and user-friendly application;
• Designed and implemented a unique integration of OpenAI and Dalle to facilitate seamless, prompt creation and image visualization;
• Developed an intuitive user interface, making it accessible for users with varying levels of technical expertise;
• Engineered a dynamic system for generating and refining text prompts, enhancing the creative process for users;
• Conducted thorough testing, including unit and integration tests, to ensure the reliability and efficiency of the application;
• Maintained and updated the application regularly, responding to user feedback and evolving requirements.

The product's mission is to utilize the latest technologies to modernize the battery service industry. Their hardware was designed and built to streamline installations, reducing system setup and maintenance costs. Their software was developed so that Users could spend less time analyzing data and compiling compliance reports. Orkun was responsible for creating their battery-testing app from scratch.

• Created a scalable and easy-to-maintain app that met all client requirements;
• Integrated APIs and Bluetooth functionality;
• Utilized his knowledge of SQLite to ensure the app was functional and efficient.

It is one of Europe's leading solar companies, with local offices in Sweden, Spain, Germany, Belgium, and the Netherlands with 20,000+ customers. The mobile app is for customers who own Svea Solar products (solar panels, inverters, etc.)

The app is helpful to:

• Understand how much electricity is consumed in a particular house;
• Understand how the changes affect both the environment and the customer's wallet;
• Get more out of solar cells. See when to produce the most and make better decisions.

• Updated react-navigation from 4th to 5th version;
• Refactored navigation stack;
• Implemented feature flags;
• Implemented support case creation screens and flow;
• Implemented new analysis screens and graphs;
• Added storybook documentation implementation;
• Added units and UI tests for better QA.

The project is for technicians who work with machines daily. The application collects diagnostic data from problems that occurred before and implement an AI algorithm to make suggestions on similar problems, leading to better efficiency and quick solutions. Basically, it's an automated stack overflow for machines.

• Developed a full-stack project from scratch including system design, database design, Front-End, Back-End, and mobile application in both iOS and Android;
• Implemented using AWS Lambda, DynamoDB, ElasticSearch, React, React Native, Javascript, Typescript, Node.js, Express.js.