- Develop Teedji carpool iOS application from skectch- Firebase realtime database- Firebase serverless cloud function ( nodejs)- Firebase Analytics- Google bigQuery for data analytics

Principal iOS developer at Kizoa company which has many years' experiences of research & development in video processing. Participated in several projects:===== iOS : main job ===== Develop a video editor iOS application from A to Z. The application allows users to create video quickly and add effects and transitions easily. * AVFoundation framework : Video encoding, decoding, cutting, stitching, export. > Video decoding speed more than 100 fps for a full HD video on iPhone 6 and very fast on iPhone 7. > 4 full HD videos decoding and displaying Simultaneously and smoothly on iPhone 6 and more than 20 videos on iPhone 7.* AVPlayer, AVAudioPlayer : audio play, cut, cutting, stitching, multiple track audio merging, audio effects like fade in, fade out, slow motion, etc. * MetalKit, CIFilter : 3D Video transitions, 3D video filters, color matrix filters. * AVAudioRecorder : recorder * Social share: Facebook, Twitter, Youtube, MMS, email. * IAP : In App Purchase in Apple store * CoreImage : human face detection * APNS : Apple Push Notification service * NSURLConnection : upload / download files, http request * Crashlytics : automatic crash reporting, iOS application usage tracking, analysis.===== Html5 web application : WebGL part ===== Make a major part of transitions and effects for the new version of html5 web application. * 100+ 3D transitions in web video editor application like Reflection, Shapes, Zooms, Sweeps, etc. * 100+ 3D effects in web video editor application like Light, Motion, etc.===== Android video decoding first try ===== Verify the possibility of making the same application on Android, test video decoding speed. * Integration of ffmpeg on android to decode video into RGBA images * Integration of VLClib on android to decode video into RGBA images * Use Android MediaCodec and OpenGL for video decoding and YUV-RGB conversion.

1. Linux system software development(c,c++，java，KVM), on device debug implementation.2. JAVA API for reading and writing wireless module's NVM memory.(java, c)3. Wireless module auto-test system.(python)4. Reviewboard for code review.(python, dijango, Apache, MySQL, javascript)

Keio university is known as the best private university of higher education in Japan, OMAE laboratory has more than 20 members who develop the technology for self-driving car such as Navigation, Motion detection technology , and vehicle autonomous control.Works : Read CAN bus information from a TOYOTA ESTIMA and drive the car by PC(Laptop)Part I : Read CAN bus information- Made a C++ program to read CAN messages from a OBD-II USB interface.- Identified major CAN bus IDs such as speed, throttle,brake,steering angle, mini wave sensor.- Decoded CAN bus messages of these IDs.- Made a GUI by using QTcreator to display the car information in real time. Part II : Drive the car by PC(laptop)- Identified the wires of brake, throttle, steering wheel. measured voltage of these wires,and found the relations between voltages and physical positions.- Designed a circuit board, this circuit board reads commands from PC and changes the voltages of these wires to control the car.- Made a C program to send commands from PC to the circuit board.

tools : Xilinx Spartan 3e board, programming VHDL.Subject is to read analog signal and filter this signal by a digital filter, then send the signal correct.- Designed and implemented a protocol to read data from a Analog-Digital Converter IC.- Designed and implemented a protocol to send data to a Digital-Analog Converter IC.- Designed and implemented a digital filter on Spartan 3e board.

Analyzed effects of electronic noise on frequency measurements :Subject is to find out the relation between variance and Spectral density of electronic noise. -Designed 2 different oscillator circuits and implemented PCB by using Cadence.- Made a LabView program for automatic measurement on frequency meter- Used Matlab for data analysis.