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Software Development

Senior Software Engineer at DoctorBox

Open to:Contract rolesPart-time rolesCommissioned workMentoring othersCollaborations
Preferred workplace:Remote (worldwide)
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I’m a software developer and tech lead specializing in mobile apps, backend systems, audio processing, and hardware-integrated software.I build reliable, maintainable software from prototype to production, with a strong focus on understanding the real product goal behind the technical requirements. My work spans Flutter, native iOS/Android, Quarkus/Java, Node.js, Postgres, audio technology, IoT, and external system integrations.A growing part of my work is AI-assisted development governance: reviewing and guiding code produced by AI agents such as Claude or Codex to make sure it is secure, strategically aligned, maintainable, and futureproof.Specialties: AI-generated code governance and strategic technical review, mobile development, Flutter, iOS, Android, Quarkus/Java, Node.js, Postgres, audio processing, IoT, hardware integration, prototyping, and technical leadership.

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Career: 9

Senior Software Engineer

DoctorBox

Jun 2026 - Present

Founder

Yaeum

Germany

Oct 2024 - Present

Building a cutting-edge language learning app from the ground up, harnessing the power of AI and seamless API integrations to create a personalized and immersive learning experience. Focused on delivering innovative solutions that enhance language acquisition through smart automation, adaptive learning techniques, and dynamic content tailored to users’ needs. Passionate about leveraging technology to revolutionize the way people learn new languages.

Founder

Ars Subtilior

Aug 2010 - Present

Agile Software Development including Mobile (iPhone, Android) Applications, Rails, Ruby and Java.

Chief Technology Officer

DoctorBox

Jun 2022 - Jun 2026

CTO

BLABBER

Sep 2019 - Mar 2020

Head Of Mobile Development

BLABBER

Monaco

Mar 2016 - Mar 2020

Developer

Interactive Objects GmbH

2001 - Jul 2010

Software Developer

Interactive Objects Software GmbH

2001 - Jul 2010

Technical Director

cult group GmbH

Oct 1999 - Aug 2001

Education: 3

Eberhard-Karls-Universität Tübingen

Education

1997 - 2000

Seoul National University

Education

1999

Hochschule für Musik Karlsruhe

Education

1994 - 1999

Credentials: 1

Languages: 4

German(Native or bilingual)
English(Full professional)
Chinese(Limited working)
Korean(Limited working)

Skills: 49

Other

Agile MethodologiesAJAXAmazon S3Amazon Web Services (AWS)AndroidAndroid DevelopmentAugmented RealityBlockchain
Bluetooth LECC++Cloud ComputingCore AudioDatabasesDigital AudioEOSFlutterInfluxDBiOS developmentIoTiPad Application DevelopmentiPhoneiPhone Application DevelopmentJavaLarge Language Models (LLM)LinuxMac OS XMobile Application DevelopmentMobile ApplicationsMobile DevicesNestJSObjective-COOPProgrammingReact NativeREST APIsRubyRuby on RailsRxScrumSmart ContractsSoftware DesignSoftware DevelopmentSoftware EngineeringSoliditySQLSwiftUnified Modeling Language (UML)Web Applications