I have experiences in the following fields.
Video editing: FFmpeg, AviSynth, VapourSynth;
complex filters and scripting in FFmpeg, advanced video denoise methods (e.g. old or noisy or shaky sources, interlaced vhs and dvd sources), correcting broken mp4 files, adding and creating intro, logo and subtitle overlays, zoom and pan, high quality video stabilization, colorspace transformations, etc.
Preferred encoding type is H.264 with x264, though have experience with DivX/Xvid, MPEG2, Motion PNG, VP9, H.265/x265, AV1, as well as with NVEnc.
Audio editing: noise reduction and volume level normalization, working with text to speech engines, audio file splitting (final output by aac, mp3 or vorbis encoders).
3D modelling and animation rendering: Blender / Cycles.
(CPU and GPU rendering, photorealistic shaders, using HDRI environmental textures, creating and rendering animations like 3d logos, fine rotation/translation of objects & camera motion; some example works are under "Recently completed 3D modells").
Image editing: Gimp, ImageMagick.
It also includes: high quality upscale (e.g. Spline64) and superresolution upscale methods (e.g. waifu2x).
Programming: including numerical & modelling tasks.
(numerical MC simulations, optimizations, "Completed another programming works" could be checked in the portfolio).