I am a Linux Kernel developer, upstream Linux Kernel contributor and maintainer of:

• Devicetree bindings,
• Memory controller drivers, NFC subsystem and drivers, 1-Wire subsystem
• Samsung S3C/Exynos ARM and ARM64 architectures,
• Clocks, pinctrl, ASoC, PMIC and MUIC drivers for Samsung SoCs and Exynos based boards,
• NFC neard daemon (the user-space counterpart of Linux NFC user-stack).

I am quite active Linux kernel contributor - see LWN.net statistics for e.g. v6.9, v6.8, v6.7, v6.6, v6.5, v6.4, v6.3, v6.2, v6.1, v6.0, v5.19, v5.18, v5.16, v5.15, v5.14, v5.13, v5.11, v5.10, v5.9, v5.6, v5.5, Linux Kernel Development 2016, v4.8, v4.3, v4.2, v4.1, v4.0. See also list of my Linux kernel contributions.