The stack I actually ship with — measured against shipped projects, not job titles.
Dockerized tool that turns GPX traces into preview videos by stitching Mapillary street-level imagery with Google fallback — built for road-trip planning.


HTTP web server built from scratch with headers, body, CGI, and file handling.
Shell with pipes, redirections, environment variables, and built-in commands.
Ray tracer implementing basic shapes, lights, and shadows.