Orkun is available for hire
Hire OrkunOrkun Muti
Verified Expert in Engineering
Full-stack Mobile Developer
Bydgoszcz, Poland
Toptal member since June 3, 2022
Bio
Orkun is a highly skilled, full-stack software engineer with a strong emphasis on front-end development and 10+ years of professional experience. He has worked on projects at global companies such as Siemens, Svea Solar, and SkyFi, where he excelled in delivering scalable solutions to multiple customers. With a passion for new challenges, Orkun is committed to producing top-notch code while balancing his clients' needs and business objectives.
Portfolio
Goldie Baby LLC
Retrieval-augmented Generation (RAG), TypeScript, Supabase, Lovable, OpenAI...
Treble Health Audiology Services, P.C.
React Native, Supabase Auth, Supabase, Stripe API, Node.js, Stripe...
Benaforma, Inc.
React Native, React, Firebase, TypeScript, Node.js, REST APIs, Expo, AWS Lambda...
Experience
- JavaScript - 10 years
- React Native - 8 years
- React - 8 years
- Node.js - 8 years
- CSS - 7 years
- Jest - 4 years
- TypeScript - 3 years
- Expo - 3 years
Preferred Environment
JavaScript, Expo.io, React Native, React, Node.js, React Redux, Cross-platform App Development, Mobile App Development, User Experience (UX), Mobile UI, AI-generated Code, Vercel, AI Integration, Artificial Intelligence (AI), Image Generation, Architecture, Design, Google Cloud Platform (GCP), Vibe Coding, Notion, AI Agents, Cursor AI, Claude, Large Language Models (LLMs), LiDAR, Robot Operating System (ROS), Simulations, Test Automation, Agentic AI, API Development, Claude Code, NestJS, Payments, User Experience Design, Third-party Integration, Payment APIs, AI Chatbots, Fitness, Exercise & Fitness
The most amazing...
...app I built was Skyfi, a ground-breaking success in six months, with the highest quality and 80% test coverage, ranking top on HackerNews during its release.
Work Experience
RAG/Full-stack Developer
2025 - 2026
Goldie Baby LLC
- Architected a multi-agent AI system with seven specialized OpenAI agents (intent routing, safety rules, RAG-Lite, empathy) orchestrated via Supabase edge functions, delivering real-time streaming chat with deterministic clinical safety enforcement.
- Built a hybrid React Native/Expo mobile app with native bridges for Supabase JWT auth sync, Expo push notifications with interactive actions, and RevenueCat subscription billing, wrapping a React 19 PWA via WebView.
- Developed a custom RAG-Lite pipeline using pgvector hybrid search (semantic and lexical scoring) with a DSL-based applicability filter, enabling personalized infant feeding guidance from a structured clinical knowledge base.
- Implemented 35+ Supabase edge functions, including timezone-aware push notification scheduling with quiet hours and frequency caps, LLM-powered daily reflections, memory extraction with canonical key validation, and onboarding analysis.
Technologies: Retrieval-augmented Generation (RAG), TypeScript, Supabase, Lovable, OpenAI, Full-stack, Chatbots, React Native, Push Notifications, Progressive Web Applications (PWAs), Expo, AI-generated Code, Vite, Vercel, AI Integration, Artificial Intelligence (AI), Design, Vibe Coding, Notion, AI Agents, Cursor AI, Claude, Large Language Models (LLMs), Bug Fixes, Agentic AI, API Development, Claude Code, Payments, User Experience Design, Third-party Integration, Payment APIs, AI Chatbots, Software as a Service (SaaS)
React Native Developer
2025 - 2025
Treble Health Audiology Services, P.C.
- 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.
Technologies: React Native, Supabase Auth, Supabase, Stripe API, Node.js, Stripe, AI-generated Code, Vercel, Design, Google Cloud Platform (GCP), Vibe Coding, Cursor AI, Claude, Large Language Models (LLMs), Bug Fixes, Agentic AI, API Development, Claude Code, NestJS, Payments, User Experience Design, Third-party Integration, Payment APIs, Software as a Service (SaaS)
Lead Full-stack Developer
2025 - 2025
Benaforma, Inc.
- Built a mobile app from scratch using Expo, ensuring pixel-perfect implementation aligned with Adobe XD designs.
- Partnered directly with the founder to translate evolving requirements into agile, iterative features with rapid feedback cycles.
- Implemented Expo OTA update flow and streamlined iOS distribution via TestFlight, enabling faster release cycles and efficient testing.
Technologies: React Native, React, Firebase, TypeScript, Node.js, REST APIs, Expo, AWS Lambda, SendGrid, MongoDB, Amazon Web Services (AWS), AI-generated Code, Design, Vibe Coding, Cursor AI, Claude, Large Language Models (LLMs), Bug Fixes, Agentic AI, API Development, Claude Code, User Experience Design, Third-party Integration
Full-stack Developer
2025 - 2025
Playlists Inc.
- Migrated the back end from MongoDB and Supabase to Firebase, consolidating authentication and database services for improved consistency and maintainability.
- Implemented social authentication (Google, iCloud, and phone number) to replace email/password login, significantly reducing user friction and enhancing mobile-first onboarding.
- Boosted app performance and user experience by integrating React Query for efficient state and data management, and enabling push notifications for real-time user engagement.
Technologies: React Native, JavaScript, iOS, Node.js, Mapbox API, TypeScript, App Store, Full-stack Development, AI-generated Code, Design, Google Cloud Platform (GCP), Vibe Coding, Cursor AI, Claude, Large Language Models (LLMs), Bug Fixes, Agentic AI, API Development, Claude Code, Payments, User Experience Design, Third-party Integration, Payment APIs
Lead Mobile App Developer
2024 - 2025
Butlergruppen Sweden AB
- Led the development of two primary mobile applications, overseeing the entire lifecycle from initial setup to final release, and ensuring stability and scalability from day one.
- Maintained and enhanced the apps using React Native, continuously improving performance, fixing issues, and delivering regular updates to keep the apps current and functional.
- Executed thorough testing and collaborated closely with the CTO to guarantee high performance, reliability, and a user-friendly experience throughout both applications.
Technologies: React, React Native, Redux, Figma, Amazon Simple Queue Service (SQS), Firebase, TypeScript, Design, Bug Fixes, API Development, User Experience Design, Third-party Integration, Software as a Service (SaaS)
Sole Founder/Developer
2024 - 2025
Rizz Vibes: AI Wingman
- 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.
Technologies: React Native, Expo, OpenAI, Stable Diffusion, ComfyUI, Node.js, Express.js, Firebase, Google Cloud, Figma, UX Design, App Store Optimization (ASO), App Store Marketing, RevenueCat, Full-stack Development, AI Integration, Artificial Intelligence (AI), Image Generation, Design, Google Cloud Platform (GCP), AI-generated Code, Vibe Coding, AI Agents, Cursor AI, Claude, Large Language Models (LLMs), Bug Fixes, Agentic AI, API Development, Claude Code, NestJS, Payments, User Experience Design, Third-party Integration, Payment APIs, AI Chatbots
Senior Full-stack Developer
2023 - 2024
Mediyoga Sweden
- Managed both back-end and mobile development, completely rewriting and releasing the legacy mobile application using React Native and TypeScript to establish a solid and modern foundation for future growth.
- Implemented Firebase Authentication with support for Google and Apple sign-in. Following the addition of a back-end developer to the team, the focus shifted entirely to mobile development to ensure maximum impact on app quality and user experience.
- Established a robust bridge between the mobile app and a Django back end, leveraged Microsoft App Center for efficient builds and deployments, and collaborated closely with designers in Figma to deliver a polished, pixel-perfect UI/UX.
Technologies: React Native, Django, Microsoft SQL Server, Figma, UX Design, TypeScript, iOS, Android, Jest, Design, Bug Fixes, API Development, User Experience Design, Third-party Integration
React Native Developer
2023 - 2024
Emsys Design, LLC
- Completely rewrote the app from scratch, utilizing a clean architecture and modern development practices, resulting in a vastly improved UI/UX and a scalable foundation for future enhancements.
- Transitioned the codebase to TypeScript, reducing bugs significantly from 30-40 to just a couple and enhancing code readability and developer productivity.
- Developed Redux-based offline mode, replacing SQLite challenges with a more seamless and robust data handling solution, ensuring smooth user experiences even in offline scenarios.
- Improved Bluetooth connectivity with devices, delivering a more reliable and efficient integration process tailored for the battery testing product.
Technologies: React Native, SQLite, APIs, Bluetooth, Angular, Redux, TypeScript, Jest, Android, UI Design, UX Design, React Query, Full-stack Development, Design, AI-generated Code, Bug Fixes, Agentic AI, API Development, User Experience Design, Third-party Integration, Software as a Service (SaaS)
Senior Software Engineer
2022 - 2024
Skyfi
- Abstracted logic for maintainability and testability. Adhered to best practices in component architecture for an efficient codebase as a senior developer at SkyFi and was responsible for complex React Native components across multiple screens.
- Solved complex challenges, such as delivering satellite images effectively, and provided on-call support. Oversaw the release process, mentoring new team members to ensure a smooth launch.
- Featured as number one on Hackernews for delivering impactful, innovative solutions. Demonstrated the ability to solve complex challenges and drive impact.
- Set up the release process from scratch using AppCenter, TestFlight, and Google Play Store. Ensured seamless delivery of updates and streamlined the release process. Provided on-call support, addressing and resolving issues with post-mortem reports.
- Provided round-the-clock, on-call support, displaying great professionalism and responsibility in addressing and resolving issues. Created thorough post-mortem reports to prevent future occurrences and delivered instant feedback and bug fixes.
Technologies: React Native, TypeScript, GitHub, Jira, Git, Pixel Perfect, iOS, React, JavaScript, CSS, HTML, Redux, JSON, APIs, Unit Testing, Google Play Store, App Store, CI/CD Pipelines, API Integration, Mobile, Android, Web Development, Mobile Development, Mobile Apps, Application State Management, Reusable Libraries, REST APIs, Jest, React Redux, Visual Studio Code (VS Code), Mapbox, Front-end Development, Front-end, Slack, MacOS, Mapbox GL, Cross-platform App Development, Mobile App Development, User Interface (UI), UX Design, User Experience (UX), Mobile UI, Mobile UX, Mapbox API, React Query, Full-stack Development, Design, Google Cloud Platform (GCP), AI-generated Code, Notion, Bug Fixes, Agentic AI, API Development, User Experience Design, Third-party Integration, Software as a Service (SaaS)
Senior Full-stack Developer
2022 - 2023
Fetch My Stuff Web and Mobile app
- Led the overhaul of an outdated Frontity-based React application, rebuilding it from scratch using pure React to create a more flexible and maintainable codebase.
- Enhanced speed and responsiveness through the integration of React Query and other modern tools. Delivered new features, refined the design, and ensured timely delivery across all milestones.
- Integrated WooCommerce and WordPress into the architecture, collaborated with a Node.js back end, and implemented Klarna for seamless payment processing.
Technologies: React, React Native, TypeScript, Amazon Cognito, AWS Amplify, Redux, Node.js, Express.js, WordPress, Design, Bug Fixes, API Development, User Experience Design, Third-party Integration, Software as a Service (SaaS)
Senior Software Engineer
2022 - 2023
Svea Solar
- Developed the most impactful features, complete with dynamic interactive graphs and animations, as a senior React Native developer at Svea Solar.
- Joined the release process, leading the implementation of streamlined deployment procedures, refactoring over 50% of the code to simplify the app architecture and improve speed by preventing unnecessary re-renders.
- Initiated the development of a comprehensive documentation system and created a storybook from scratch, ensuring a clear understanding of components and their interactions.
- Sought to improve the app's performance with my measurably impactful contributions. I was constant in my focus on delivering exceptional user experiences.
Technologies: React Native, TypeScript, Jest, GitHub, Jira, Full-stack, Git, User Authentication, Figma, Pixel Perfect, Storybook, iOS, React, JavaScript, CSS, HTML, Redux, D3.js, JSON, OAuth, APIs, Unit Testing, Google Play Store, App Store, Expo.io, CI/CD Pipelines, API Integration, Mobile, Android, Web Development, Mobile Development, Mobile Apps, Application State Management, Reusable Libraries, REST APIs, Expo, Chart.js, NoSQL, React Redux, Visual Studio Code (VS Code), Apollo, Front-end Development, Front-end, Sass, Slack, MacOS, Cross-platform App Development, Mobile App Development, User Interface (UI), UX Design, User Experience (UX), Mobile UI, Mobile UX, React Query, Full-stack Development, Design, Bug Fixes, API Development, User Experience Design, Third-party Integration, Software as a Service (SaaS)
Senior Software Engineer
2019 - 2022
Siemens
- Developed the corpus ticket management system for one of Turkey's largest banks, now used by over 50,000 people. I was the lead architect and senior developer.
- Created a full-stack, virtual Sinumerik assistant project from scratch, utilizing AWS Lambda, DynamoDB, Elasticsearch, React, React Native, Node.js, and Express, now adopted by various companies in Germany.
- Took over an in-house pain point portal project, written in AngularJS and Node.js, and implemented bug fixes and new features before deploying to production using Docker.
- Demonstrated expertise in full-stack development, with a strong focus on delivering high-quality and scalable solutions.
- Provided leadership and direction in complex projects, ensuring seamless integration and successful deployment of cutting-edge technologies.
Technologies: React, React Native, Node.js, PostgreSQL, Amazon Web Services (AWS), Amazon Cognito, Amazon DynamoDB, Amazon S3 (AWS S3), Redis, Angular, TypeScript, JavaScript, Full-stack, Git, Push Notifications, User Authentication, Figma, AWS Amplify, Material UI, Pixel Perfect, iOS, Tailwind CSS, Chart.js, MongoDB, CSS, HTML, Redux, D3.js, JSON, OAuth, APIs, Unit Testing, Google Play Store, App Store, Expo.io, Mobile, Android, Python, Web Development, Mobile Development, Mobile Apps, Application State Management, Reusable Libraries, REST APIs, NoSQL, React Redux, MySQL, Visual Studio Code (VS Code), Serverless Architecture, Serverless, AWS Lambda, Front-end Development, Front-end, MacOS, Cross-platform App Development, Mobile App Development, UI Design, User Interface (UI), UX Design, User Experience (UX), WebSockets, Mobile UI, Mobile UX, Full-stack Development, Design, Robot Operating System (ROS), Bug Fixes, API Development
Software Engineer
2016 - 2019
Aksa Energy
- Developed a web application to automate manual gas measurement processes, saving the company millions of dollars and freeing up non-technical internal teams' working time by at least 3-4 hours daily.
- Designed and managed an SMS and e-mail alarm system for natural gas stations, ensuring efficient communication and monitoring of critical systems.
- Created a gas meter management system using cutting-edge technologies like React, Microsoft SQL Server, and .NET Core, providing a modern and user-friendly solution.
- Initiated projects highly appreciated by management teams, resulting in significant cost savings for the company and improvements to overall efficiency.
Technologies: React, .NET, Windows Presentation Foundation (WPF), Microsoft SQL Server, SCADA, Telemetry, Kepware Server (PLC Integration), Node.js, Full-stack, Git, User Authentication, Material UI, Pixel Perfect, Chart.js, JavaScript, CSS, HTML, Redux, JSON, Unit Testing, Python, Web Development, Renewable Energy, Application State Management, Reusable Libraries, REST APIs, React Redux, MySQL, Visual Studio Code (VS Code), Front-end Development, Front-end, UI Design, User Interface (UI), User Experience (UX), WebSockets, Mobile UX, Full-stack Development, Bug Fixes, API Development
Experience
Senior Full-stack Developer
https://adway.ai/Adway is an AI-powered recruitment marketing platform that helps companies attract and hire better candidates through social-first recruiting. By automating paid social job ads, employer branding, and candidate engagement, Adway enables talent teams to reach untapped talent pools, improve candidate quality, and reduce time-to-hire.
Skyfi Mobile App
https://www.skyfi.com/Skyfi is making high-res satellite photos and videos available to everyone. With Skyfi, you can:
• Capture photos of your most cherished memories.
• Monitor environmental trends in climate change or deforestation.
• Plan a cross-country move or purchase an out-of-state home.
• Explore the world outside the bounds of physical travel.
The mobile app is developed in React Native to handle both IOS and Android. I was one of the mobile app developers who mainly worked on map and GIS components to make sure users could go around on a map and select an area that they wanted a satellite image of, which required complex calculations.
• Capture photos of your most cherished memories.
• Monitor environmental trends in climate change or deforestation.
• Plan a cross-country move or purchase an out-of-state home.
• Explore the world outside the bounds of physical travel.
The mobile app is developed in React Native to handle both IOS and Android. I was one of the mobile app developers who mainly worked on map and GIS components to make sure users could go around on a map and select an area that they wanted a satellite image of, which required complex calculations.
Siemens Sinumerik Service Assistant
This project targeted technicians who work with Siemens machines daily. The application collects diagnostic data from problems that occurred and implements an AI algorithm to make suggestions on similar issues, which leads to better efficiency and quicker problem solution. It's an automated stack overflow for machines.
I worked as a full-stack developer and developed the project from scratch, including setting up React Native, React, AWS Serverless, Cognito, S3, security groups, etc. I handled every part of the application to make sure it was always up and running and ensured customer satisfaction.
I worked as a full-stack developer and developed the project from scratch, including setting up React Native, React, AWS Serverless, Cognito, S3, security groups, etc. I handled every part of the application to make sure it was always up and running and ensured customer satisfaction.
Svea Solar Mobile App
Svea Solar is one of Europe's leading solar companies, with local offices in Sweden, Spain, Germany, Belgium, and the Netherlands, serving 20,000+ customers.
The mobile app is for customers who own Svea Solar products, such as solar panels, inverters, etc.
The app is helpful to:
• Understand how much electricity the user is consuming in a particular house.
• Understand how the changes affect both the environment and the user's wallet.
• Get more out of solar cells. See when to produce the most and make better decisions.
I worked as a mobile app developer, and my main focus was on new app features that required dynamic graphs, tooltips, and lists with animations. On top of that, I worked hard to restructure the project to get it in a better shape in terms of code quality, readability, maintainability, and unit testing.
The mobile app is for customers who own Svea Solar products, such as solar panels, inverters, etc.
The app is helpful to:
• Understand how much electricity the user is consuming in a particular house.
• Understand how the changes affect both the environment and the user's wallet.
• Get more out of solar cells. See when to produce the most and make better decisions.
I worked as a mobile app developer, and my main focus was on new app features that required dynamic graphs, tooltips, and lists with animations. On top of that, I worked hard to restructure the project to get it in a better shape in terms of code quality, readability, maintainability, and unit testing.
AI Photo Generator: Picbox
https://apps.apple.com/tr/app/ai-photo-generator-picbox/id6471105245I was the lead developer of Picbox, an AI-powered iOS app that transforms selfies into high-quality, stylized portraits using Stable Diffusion. I built the app using React Native, TypeScript, and integrated RunPod for image generation. The back end, built with Node.js, Express, and Firebase, supports real-time updates and job handling via WebSockets. I also implemented in-app purchases, style updates, and contributed to the App Store listing and privacy features. The app has a 4.6-star rating and serves thousands of users.
AI Redesign
I developed AI Redesign, a mobile app that lets users virtually redesign interior spaces using generative AI. Built with React Native, TypeScript, and Stable Diffusion on RunPod, the app transforms photos of rooms into new interior styles. The backend, using Node.js, Express, Firebase, and WebSockets, supports image processing, real-time updates, and session management. I also handled the in-app purchases system, style variation rollouts, and App Store deployment.
Education
2019 - 2021
Master's Degree in Software Engineering
Bogazici University - Istanbul, Turkey
2016 - 2018
Master's Degree in Engineering Management
Marmara University - Istanbul, Turkey
2009 - 2014
Bachelor's Degree in Mechanical Engineering
Middle East Technical University - Ankara, Turkey
Certifications
AUGUST 2019 - AUGUST 2022
AWS Certified Solutions Architect Associate
AWS
Skills
Libraries/APIs
React, Node.js, Chart.js, D3.js, REST APIs, React Redux, API Development, AWS Amplify, Mapbox GL, React Query, Stripe, Stripe API, Mapbox API, Zod
Tools
GitHub, Jira, Expo, Amazon Cognito, Git, Expo.io, GIS, Claude, Claude Code, Slack, Figma, ComfyUI, Notion, Amazon Simple Queue Service (SQS), SendGrid
Languages
TypeScript, JavaScript, SQL, CSS, HTML, Sass, GraphQL, Python
Frameworks
React Native, Material UI, Express.js, Redux, NestJS, Jest, Tailwind CSS, Django, Next.js, Angular, .NET, Windows Presentation Foundation (WPF), Cypress
Paradigms
Agile Software Development, Scrum, Unit Testing, Mobile Development, Microservices, Serverless Architecture, UI Design, UX Design, App Store Optimization (ASO), Test Automation, Management
Platforms
Visual Studio Code (VS Code), Mobile, Google Cloud Platform (GCP), MacOS, Firebase, AWS Lambda, Amazon Web Services (AWS), Mapbox, iOS, Android, RevenueCat, Vercel, Docker, WordPress, RunPod
Storage
PostgreSQL, JSON, Amazon S3 (AWS S3), NoSQL, MySQL, Datadog, Amazon DynamoDB, Redis, Microsoft SQL Server, Elasticsearch, Google Cloud, MongoDB, SQLite
Other
Software Design, Front-end, Front-end Development, APIs, Full-stack, Pixel Perfect, OAuth, API Integration, Web Development, Mobile Apps, Application State Management, Reusable Libraries, Cross-platform App Development, Mobile App Development, User Interface (UI), User Experience (UX), Mobile UI, Mobile UX, OpenAI, Software as a Service (SaaS), Full-stack Development, Maps, AI-generated Code, Vite, AI Integration, Architecture, Design, Vibe Coding, Cursor AI, Large Language Models (LLMs), Bug Fixes, Agentic AI, User Experience Design, Third-party Integration, AI Chatbots, Fitness, Exercise & Fitness, Computer Science, Software Development Lifecycle (SDLC), Apollo Server, AWS Cloud Architecture, Styled-components, Serverless, Push Notifications, User Authentication, Storybook, Apollo, Google Play Store, App Store, CI/CD Pipelines, Renewable Energy, WebSockets, Stable Diffusion, App Store Marketing, Chatbots, AI Agents, Zustand, Supabase Auth, Artificial Intelligence (AI), Image Generation, LiDAR, Robot Operating System (ROS), Simulations, Payments, Payment APIs, Engineering Management, Marketing Mix, 3D Design, Solar, Structural Analysis, Fluid Dynamics, SCADA, Telemetry, Kepware Server (PLC Integration), Geolocation, Mapping, Technology, Bluetooth, Supabase, Image Processing, RESTful Microservices, Retrieval-augmented Generation (RAG), Lovable, Progressive Web Applications (PWAs)
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