Experience
René Doháň · Senior Mobile & Cross-Platform Engineer · 2005 – Present
Full-stack React and AWS crypto platform
●Designing and engineering a large full-stack web platform now in the final stage of development
●Using AI-assisted development across the React frontend and AWS application workflows from product design through release preparation
Native Android music apps and a custom low-latency C++ audio engine
●Renetik Music Apps Ten native Android music apps powered by a shared low-latency C++ audio engine
●Delivered ten current Android music applications with at least 170K combined public Google Play installs as of July 2026
●Designed real-time DSP architecture, audio sequencing, FX chains, metronome engines, MIDI I/O and multi-instrument playback
●Implemented automated testing and release pipelines with Firebase-backed analytics and crash reporting
●Renetik Music Apps: built and maintain the website while owning design, development, QA, releases and customer feedback
●Music Studio: all-in-one multi-track recording, sequencing, looping and editing music production software
●FxRack: real-time audio effects rack with customizable effects
●Mix: multi-channel mixer for live balancing and gain control
●Metronome: precision tempo guide with visual and haptic cues
●Looper: multi loop live recording with overdub support and live performance capabilities
●MIDI Sequencer: pattern-based step sequencer for MIDI hardware
●MIDI Controller: customizable on-screen controls for external synths
●Drums: all-in-one drums focused app
●Piano: all-in-one piano focused app
●Guitar: all-in-one guitar focused app
Cross-platform app enhancements and legacy code modernization
●Developing both platforms: improving the inherited Android codebase and continuing the Swift app I originally delivered in 2017
●Google Play – Motorkari.cz Android: optimized performance, modernized UI for material design compliance
●App Store – Motorkari.cz iOS: updated to Swift 5, integrated new push-notification workflows and background sync
Development of Rcherz suite: iOS, Android, and Scoring apps
●Rcherz iOS Large native iPhone and iPad application written in Objective-C
●Rcherz Android Native Java application for the Rcherz archery platform
●Rcherz Scoring Mission-critical Android competition scoring application
Web development on an existing project
●Contributed to an existing web application using PostgreSQL for data storage
●Implemented backend features with PHP and the Yii framework
●Containerized services and managed deployment workflows with Docker
Development of native iOS apps, SDKs, and medical device integration
●Collaborated on the iOS and Android SDK for glucose-scanning medical devices in diabetes care
●Operated in a multinational remote team using Scrum, Git flow, code reviews and an API-first design approach
●Defined and implemented Gherkin-based test scenarios during the design phase for extensive QA coverage
●Worked within a regulated medical-software process using design-phase test scenarios, code reviews, and extensive QA practices
●Extended existing iOS applications and built example iOS & Kotlin sample apps to demonstrate SDK integration
Android app development, .NET backend, SQL database
●Sensoneo OLO Passport Kotlin Android app, .NET GraphQL API, and MySQL database work
Android & iOS apps for national census
●SODB 2021 Census Apps Native Android and iOS applications delivered through Plaut and Bowbook
Native mobile and web development with backend support as needed
●Charts for Bot.Media Reusable Vue and TypeScript chart component built on Chart.js
●Hand Writer / Om Writer An abandoned client assignment continued into an independently released Kotlin app
●Renetik Portfolio Multilingual Vue and TypeScript web product, rebuilt and expanded with AI-assisted development
Mobile, web, and backend development
●Hand Writer / Om Writer An abandoned client assignment continued into an independently released Kotlin app
●Property Farmer Kotlin Android app with Spring Boot, Amazon S3, mapping, and CSV workflows
iPhone & iPad app development for Motorkari.cz
●Motorkari.cz Native Android and iOS product modernization across two separate engagements
Development of iOS/Android libraries and hobby apps
●Renetik Android Reusable Kotlin libraries and sample application for professional Android work
●Renetik iOS Reusable Objective-C and Swift foundations for professional iOS projects
●Force Quit Small Objective-C macOS menu-bar utility
Development of diverse Android and iOS applications
●Promile Lady Android alcohol-level estimation application
●Pilsner & Kozel Compass Two released iPhone apps for finding nearby venues serving each beer brand
●TV Markiza Archive iPhone and iPad video application for TV Markiza
iOS and Android app development
●LiveAgent Mobile Native Android and iPhone/iPad clients for LiveAgent
●Post Affiliate Pro Mobile The first native Android and iOS apps I delivered as an independent developer
●Taxicar Two Java Android applications for drivers and passengers before ride-hailing became common
●Regiofood Java Android and Objective-C iPhone/iPad applications
Full-stack development on SaaS and desktop tools
●Agile team development (Scrum, TDD, pair programming)
●Web app: Live Agent Pro – GWT, PHP, JavaScript, MVP
●PDF parser/generator in PHP (Adobe PDF spec)
●Maintenance of Aff Notify, Unit Miner Studio
PDF Viewer app for magazine publisher
Java (Swing), PHP, PDF libraries
Java and C# desktop applications
●Unit Miner script editor (Eclipse RCP)
●J2EE web apps (JSF)
●OCR app in C# for U.S. client
●Wireframe editor (cancelled)
Bachelor’s Degree in Computer Software Engineering
Bachelor's degree
Telecommunications company
HTML, Linux, wireless networks; systems setup and installation
IT support for architectural computing
Windows, AutoCAD, networking, Linux
Computer assembly, software installation, and customer service
Hands-on experience with hardware, networking, and retail support