I started my career like this, with a boring job where I inherited a gigantic excel with a few macros. Every day I had to download via ftp millions of logs from high speed trains from all over france (the logs themselves were retrieved manually via a serial cable on each train by maintenance guys every few days). I would then run a few macros that would do a bunch of geoloc calculation, spit out results in 2 tables, one for "pretty sure results" and the other one with "not enough data", and spend the rest of the day looking a google earth screenshots and comparing lat/long and using my brain to do basic visual "puzzles". I spent a few days improving the macros but I felt limited so I learned python in a few months and created a piece of software based on graph theory that would do almost everything I was doing looking at google earth and bam, job automated. When I went to see my manager to ask for more to do, he saw the potential but let me sit on my ass a few month because I was a contractor and the job was done, and then pushed hard to get me formally hired to be trained and work in embedded C on high speed trains ! Life changing carrer move, would do it again.