Senior Mobile & Cross-Platform Engineer | Kotlin, Swift, C++, Typescript, ... | Native Apps | SDKs | Low-latency Audio Apps | Medical Software | Lead Developer | Creator of 10+ Published Apps (Android) Senior Mobile Engineer with 15+ years of experience delivering native Android and iOS applications, audio-processing software, medical-device SDKs, and large-scale consumer apps. Specialized in Kotlin, Swift, Java, C++, Objective-C, and high-performance audio and multimedia pipelines. Built 10+ published music apps under Renetik Software, including full audio engines, real-time DSP components, automated testing pipelines, and Firebase-backed services. Extensive experience in regulated environments — contributed to an FDA-reviewed diabetes-scanning SDK (iOS/Android), following strict testing, documentation, and verification workflows. Skilled in full product lifecycle: architecture, UI/UX, DevOps, testing, backend APIs, and cross-team collaboration in remote environments. Available for senior-level mobile roles, freelance engagements, and long-term remote engineering projects.…

Rene Dohan

Senior Mobile & Cross-Platform Engineer | Kotlin, Swift, C++, Typescript, ... | Native Apps | SDKs | Low-latency Audio Apps | Medical Software | Lead Developer | Creator of 10+ Published Apps (Android) Senior Mobile Engineer with 15+ years of experience delivering native Android and iOS applications, audio-processing software, medical-device SDKs, and large-scale consumer apps. Specialized in Kotlin, Swift, Java, C++, Objective-C, and high-performance audio and multimedia pipelines. Built 10+ published music apps under Renetik Software, including full audio engines, real-time DSP components, automated testing pipelines, and Firebase-backed services. Extensive experience in regulated environments — contributed to an FDA-reviewed diabetes-scanning SDK (iOS/Android), following strict testing, documentation, and verification workflows. Skilled in full product lifecycle: architecture, UI/UX, DevOps, testing, backend APIs, and cross-team collaboration in remote environments. Available for senior-level mobile roles, freelance engagements, and long-term remote engineering projects.…

Available to hire

Senior Mobile & Cross-Platform Engineer | Kotlin, Swift, C++, Typescript, … | Native Apps | SDKs | Low-latency Audio Apps | Medical Software | Lead Developer | Creator of 10+ Published Apps (Android)

Senior Mobile Engineer with 15+ years of experience delivering native Android and iOS applications, audio-processing software, medical-device SDKs, and large-scale consumer apps.

Specialized in Kotlin, Swift, Java, C++, Objective-C, and high-performance audio and multimedia pipelines.

Built 10+ published music apps under Renetik Software, including full audio engines, real-time DSP components, automated testing pipelines, and Firebase-backed services.

Extensive experience in regulated environments — contributed to an FDA-reviewed diabetes-scanning SDK (iOS/Android), following strict testing, documentation, and verification workflows.

Skilled in full product lifecycle: architecture, UI/UX, DevOps, testing, backend APIs, and cross-team collaboration in remote environments.

Available for senior-level mobile roles, freelance engagements, and long-term remote engineering projects.

See more

Skills

Experience Level

Android
Expert
Java
Expert
Kotlin
Expert
iOS
Expert
Swift
Expert
C++
Expert
Objective-C
Expert
TypeScript
Expert
SQL
Expert
Vue.js
Expert
Docker
Expert
PHP
Expert
PostgreSQL
Expert
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Language

Slovak
Fluent
English
Fluent
Spanish; Castilian
Fluent
Czech
Fluent
Indonesian
Intermediate
German
Beginner

Work Experience

Full-stack/Mobile Developer at Renetik Music Apps
June 1, 2025 - June 1, 2025
Development of music production apps using Kotlin for UI and app logic, C++ audio engine for low-latency DSP, Firebase integration, and automated testing.
Web Developer (Part-time) at Plaut Slovensko, s.r.o.
May 1, 2025 - May 1, 2025
Web development for existing project, collaborating with team, part-time engagement.
Android & iOS Developer (Part-time) at Motorkari.cz
June 1, 2025 - June 1, 2025
Native Android and iOS development, performance optimization and UI modernization.
Android & iOS Developer at Biolinq
January 1, 2024 - January 1, 2024
Android & iOS app development; SDK integration; multinational remote collaboration within Sequenex team.
Full-stack Developer at Sensoneo
March 1, 2022 - November 27, 2025
End-to-end development of Android apps, website, graphics, and backend support as needed.
Full-cycle Product Developer at Renetik Instruments
April 1, 2022 - April 1, 2022
End-to-end product development for music-related software and tools.
Lead Mobile Developer at SODB 2021
March 1, 2021 - March 1, 2021
Led mobile development for census-related apps; cross-functional collaboration in Scrum.
Frontend Developer at Renetik Software
January 1, 2020 - January 1, 2020
Web/frontend development and modernization for existing projects.
Freelance Developer at T Johnson Marketing
January 1, 2019 - January 1, 2019
Independent freelance work across web and mobile projects.
iOS Developer at Moto portal s.r.o.
January 1, 2020 - January 1, 2020
iOS app development focusing on native features and performance.
Mobile Applications Developer at Bowbook, s.r.o.
January 1, 2021 - January 1, 2021
Development of mobile applications for multiple projects.
Independent Developer at Renetik Software
January 1, 2016 - January 1, 2016
Independent software development across mobile and web platforms.
Mobile Applications Developer at TRIAD Advertising s.r.o.
January 1, 2014 - January 1, 2014
Mobile app development for advertising and promotions.
Freelance Developer at Various Clients
January 1, 2013 - January 1, 2013
Freelance development across multiple client projects.
Senior Developer at QualityUnit
January 1, 2010 - January 1, 2010
Senior development work across Java/C# stack; team mentoring and code reviews.
Java Developer at Half•Pixel Studio
December 31, 2008 - December 31, 2008
Java development in a studio environment.
Junior Developer at QualityUnit
January 1, 2008 - January 1, 2008
Junior development role focusing on Java/C# projects.
Technician & Web Administrator at MOVYS, a.s.
January 1, 2001 - January 1, 2001
IT support, technician work, and web administration.
PC Administrator at University of Architecture, Bratislava
January 1, 2000 - January 1, 2000
PC administration and IT support for a university department.
Technician & Sales at Marsoft Computer s.r.o.
January 1, 1999 - January 1, 1999
Technical sales and computer hardware/software support.
Product Developer at Renetik Music Apps
June 1, 2025 - June 1, 2025
Development of native Android apps for music production and live performance; Kotlin UI and app logic; C++ audio engine for low-latency DSP; Firebase for realtime data syncing; automated testing with Espresso and UIAutomator; unit testing with JUnit and Mockito; collaboration with cross-functional teams.
Android & iOS Developer at Biolinq (via Sequenex team)
January 1, 2024 - January 1, 2024
Developed mobile components and SDK integrations for glucose-scanning medical devices; collaborated in a multinational Scrum team; defined test scenarios using Gherkin; contributed to FDA-compliant medical software development.
Lead Mobile Developer at SODB 2021 (via Plaut / Bowbook)
March 1, 2021 - March 1, 2021
Led mobile development efforts for a national census app; architecture planning, coding, reviews, and QA coordination; cross-functional collaboration with backend and design teams.
Java Developer at Half•Pixel Studio
January 1, 2008 - January 1, 2008
Java development work focusing on backend components and integrations.

Education

Bachelor’s Degree in Computer Software Engineering at Slovak Technical University, Bratislava
January 1, 2001 - January 1, 2005

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Healthcare, Professional Services, Education
    paper Audio Looper

    Renetik Audio Looper

    Renetik Audio Looper is a lightweight, performance-oriented audio looping app built for musicians and producers.
    It delivers low-latency recording, precise timing, and a stage-friendly UI for fast creative flow.

    Features

    • Sample-accurate loop recording and overdubbing
    • Automatic beat sync and tempo control
    • Multi-track looping with per-track volume
    • Undo / Redo workflow
    • WAV export (loop or full session)
    • MIDI clock sync support
    • Clear, minimal interface optimized for performance

    Purpose

    I built Renetik Audio Looper to tackle real issues in mobile looping apps: latency, timing drift, and poor UX for live situations.
    The project showcases my skills in real-time audio, latency compensation, frame-based timing, and Android audio architecture.

    Tech Stack

    • Android (Kotlin)
    • Custom low-latency audio engine
    • Real-time frame-based timing system
    • Localization-ready XML UI resources

    Links

    My Role

    • Full app architecture
    • Audio engine implementation
    • Timing & latency logic
    • UI/UX design
    • Testing & optimization
    • Documentation & release workflow