Ars Subtilior

Your Vision, Expertly Built.

Software Developer & Tech Lead specializing in Mobile Apps, Audio Processing, and Integrated Hardware Solutions.

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About Me

Hi, I’m Dominik Wei-Fieg, a software developer and tech lead with a passion for creating intuitive, efficient solutions tailored exactly to your vision.
 I deeply believe in active listening—not just to your requirements, but to your underlying goals. My aim is always to deliver solutions that truly resonate. 

With a background in music theory and composition, as well as Korean studies at Seoul National University, my journey uniquely combines creativity and technical expertise. After embracing software development professionally in 1999, I quickly found my niche bridging audio technologies, hardware integration, and mobile solutions.

Services

Mobile App Development

  • Swift, Kotlin
  • Flutter 
  • React Native
  • Cross-platform performance and precision. 

Audio Processing Software

  • Specialized solutions for macOS and iOS 
  • Precision-driven audio technology, from prototype to polished product. 

Backend Development

  • Quarkus / Java, Node.js 
  • Databases (Postgres, Mongo, Influx, ...) 

Hardware Integration

  • Seamlessly integrate hardware with mobile apps (e.g., alarm systems, lighting control, external flash units). 

Technical Evaluations & Prototyping

  • Reliable assessments and rapid prototyping to prove concepts quickly.

Technical Leadership

  • Interim tech lead and consulting services to efficiently guide your development team.

Yaeum

Cross-platform mobile app (Flutter) with a Quarkus backend, developed to support Korean language learning. Integrates with ChatGPT, krdict.korean.go.kr, Genius.com, and additional external APIs.

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App Ear

Real-time multichannel audio processing application specifically designed for Tomatis audiology treatments.

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360 Studio

Integrated 360° photography software, compatible with various hardware turntables and DSLR cameras for both exterior and interior imaging.

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Flash Control

WiFi-enabled remote control software for professional photographic flash units, supporting macOS, iOS, and Android devices.

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MB Secure

Cross-platform application for remote control and configuration of alarm systems, using a custom WebSocket-based protocol.

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Solar Control

WiFi-based remote control app for aquarium lighting, featuring customizable and predefined lighting profiles synchronized to local sunrise, sunset, and moon phase data.

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Clients

Selected clients I’ve worked with:

Contact Us

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Address

Alexanderstrasse 116
70180 Stuttgart
Germany

phone number

+49 171 7735538

Email

info@ars-subtilior.com