I'm the other side of 60. Quit my job and took up contracting after the founders of the firm I had been employed by for decades sold out to a firm maybe 100 ti

I'm the other side of 60. Quit my job and took up contracting after the founders of the firm I had been employed by for decades sold out to a firm maybe 100 times the size. I stressed out wondering if I could still cut it with the young guns. I was contracted to create the backend for a SaaS platform, from scratch. It runs on AWS, using a lot of AWS services, and is django based. The thing is - I'd never used AWS before, nor django. (I'm not sure how they chose me, to be honest.) Picking all this new stuff up at my age it's nowhere near as easy as it used to be. But the process of writing software is not just learning libraries - and the rest I have down pat now. I immediately set designing the data structures and databases, wrote a spec based on those structures and got the spec reviewed before I started (I had to pound the table to make that happen). Then head down, arse up writing code as fast as I could. I had to deliver it all without an AWS platform to run it on, or a front end to drive it - but you don't get to my age without knowing a thing or two about unit effective testing. Then after delivering, I was told it had all been changed by the UI guy, so massive refactoring. Unit tests are worth their weigh in gold when that happens. All the while I was told I was talking too long, which ramps up the pressure and self doubt even more. (But with me muttering - what did you expect when change the UI I had based the spec on without telling me, ffs.) Boy do you lean on unit tests when that happens. Then the first code drop, which was few tens of thousands of lines of code done in a few months. Which if you crunch the numbers, was 20% of the size their existing code base, delivered by one guy, in 5% of the time it took several people to develop the existing thing. Bug rate after unit tests was below 1 bug per 5k LOC. Turns out they were begrudgingly impressed by that. So right now it seems I still can match it with the young guys. Yes learning new stuff is harder and slower, but I make up for it very efficient software methodologies honed over decades, which when I can apply them for a few weeks straight leave them in the dust. The way I feel now it seems when I'm 70 pulling that sort of stunt will be impossible, so I don't have too many more job changes left in me. But at 50, you have a while to go yet son.