Competency
Mobile
Mostly development for Android on Java with use the NDK (C/C++ binary files and libraries).
Embedded
Develop device software based on embedded Linux with rebuild kernel for specific hardware and custom rootfs. Develop UI of device on QT. Develop software for microcontrollers based on FreeRTOS or bare metal.
Electronics
Develop hardware based on STM32, AVR and Allwinner board.
Applications
ZArchiver
ZArchiver - is a program for archive management. It has a simple and functional interface. Allows you to work with various types of archives: 7zip, zip, bz2, gz2, tar and others.
AppGallery
ZArchiver Cloud Plugin
ZArchiver Cloud Plugin - plug-in provides access the ZArchiver to the cloud storages and let you to upload and download files to and from the them.
ZUGate
ZUGate - allows you to access USB drives and disk images with FAT, ExFAT, EXT2/3/4 and NTFS file systems. Supports encrypted devices (LUKS 1, LUKS 2, and BitLocker drive encryption formats).
ZFlasher STM32
ZFlasher STM32 is an Android application for programming ARM, RISC-V and STM8 microcontrollers using the programmer. Supported family: STM32, GD32, AT32, CH32, LPC8xx/11xx, nRF51/52, STM8 and others.
ZFlasher AVR
ZFlasher AVR - program for flash AVR microcontrollers. The application is based on avrdude - one of the best flasher.