• Our vision is to create a more improved system by analyzing various aspects of the existing system, from system design to business procedures. • We use Flutter to develop iOS, Android, and Web Apps with one code to improve productivity and maintainability, and use backends such as Firestore or Supabase to improve productivity and security. • Our main apps are a real-time chatting app, a dating app similar to Tinder, a directory app like Airbnb, a booking system for meeting and controlling IoT devices with Bluetooth communication.Core technology• Language: DART• Framework: Flutter• Backend: Firebase (Firestore) • App Type: iOS, Android, WebAvailable Skills• Language: C#, Java, ASP, PHP• Framework: .net• Backend: Supabase, SQL Server, Oracle

• MARS, Real-time Translation Earbuds (Best of Innovation Honoree, CES 2018)• Noise Blocking Earbuds (Innovation Awards Honoree, CES 2016) • Funded by NAVER (Apr 2017) & LINE (Jun 2017), USD 2M[Government-funded R&D, Head of research center]- IITP (Institute of Information & Communications Technology Planning & Evaluation), USD 2,200K, Jul 2018 ~ Dec 2020Development of artificial intelligence hearable devices that can protect hearing and communicate through environmental awareness in noisy industrial environment[Design of sound quality test method and analysis of results]- Designing an objective sound quality evaluation method - Music playback- Designing an objective sound quality evaluation method - Phone call- Design of voice recognition rate test method for each noise environment- Design of the in-ear mic according to the noise environment[S/W performance tuning to improve music quality and call quality]- Tuning the maximum physical displacement of the driver for each SPL (High Excursion Woofer)- Tuning the tone and sound balance for each SPL according to the loudness curve (psychoacoustic)- Performance tuning of modules such as AEQ, BWE, AEC, and AGC according to call quality and voice recognition rate[Mass production]- Design of the entire manufacturing process- Analyze the cause of defects and suggest solutions- Jig design for sensor calibration- Design of firmware for factory production (linked with assembly order) - QC test result analysis and final approval* For a detailed description of the product, please refer to the two videos below* For more information on my role, please refer to the attached reports below..

• Developing In-Ear Mic Technology that uses voice through the Eustachian tube inside the human body• Development of objective sound quality evaluation program & Supplied to Samsung Electronics and KETI (Korea Electronics Technology Institute)• 1200+ earphones, 300+ speakers, 50+ mobile phone sound quality evaluation and testing experience[Development of in-ear microphone technology]- Acoustic design and patent registration- Software block design- S/W Audio module Tuning- Analyze the causes of various problems and suggest solutions[Government-funded R&D, Head of research center]- KCA (Korea Communications Agency), USD 400K, Jul 2014 ~ Jun 2016Development of 3D stereoscopic sound realization technology for smart devices with product-specific correction technology applied- IITP (Institute of Information & Communications Technology Planning & Evaluation), USD 250K, Jul 2014 ~ Jun 2016Development of next-generation voice signal processing software and Hearable device (tentative name) prototypes that operate in the AP (DSP) of smart devices- NIPA (National IT Industry Promotion Agency), USD 180K, Jan 2016 ~ Dec 2016Development of high-quality wireless earphones and Android apps that transmit only human voices (during calls) in noisy places[Skills], Audio Engineer- Analysis and testing of acoustic performance using the following equipment in an anechoic room*HATS & Ear Simmulator Brüel & Kjær Type 4128C) & 2cc coupler / GRAS KEMAR & 43AC* Audio Analyzer Audio Precision APx52x / ARTA (PC Based audio analyzer)* Turn Table Outline ET250-3D: Ethernet* Measurement Microphone Earthworks M50

• DCS (Dealer Communication System) Project manager• A system that allows dealers of Hyundai and Kia to perform tasks such as vehicle orders, parts orders, and service entry• The highest system satisfaction score from dealers after launching the new DCS (UK & USA)[Project History]- HMA DCS (Hyundai Motor America), working in the USA, Jun 2001 ~ Mar 2002- BHMC DCS (Beijing Hyundai Motor Company), working in Korea, Apr 2002 ~ Oct 2002- KMUK DCS (Kia Motor United Kingdom), working in the UK, Nov 2002 ~ Sep 2004- HMA DCS (Hyundai Motor America), working in the USA, May 2005 ~ Feb 2006- HMI DMS (Hyundai Motor India), working in Korea, Mar 2006 ~ Dec 2006 (*only support)- KMA DCS (Kia Motor America), working in the USA, Jan 2007 ~ Dec 2007[My role]- Engineer Design S/W structure (3-tier based, MVC model, distribution plan) Design H/W structure (load balancing, clustering, firewall...)- Business Analyst Business process standardization and approval Standard screen definition and individual screen approval- Project Manager Schedule, budget and risk management Issue resolution Report unresolved issues to headquarters