Hi Milton, reading your Medium article, it sounds like you're saving about 15% of your income in a tax-deferred retirement account, saving about 50%, and trying to decide what to do with the 50% you're saving. There are a lot of articles here that look at paying off a mortgage early vs. investing the money. This comes down to the math: it makes a lot of sense to invest it for an average of 8% ROI if you have a 30 year mortgage at 3.25%. At this early point in your career, savings mean more because it will have more time to grow. On the flip side, it's emotionally satisfying to live debt-free. Decide if that's worth 4-5% to you.
The other thing I'd recommend you take a look at is maximizing your tax deferred retirement savings to improve your tax losses. It sounded like you are an independent developer and probably have access to SEP plans. A SEP IRA or Solo 401k retirement maxes out in 2015 at $53k. If you're making 350k a year and saving 53k already, great! But if you're saving less than that, I think you'll see maximum value in reducing your taxes first, saving second, and paying off your mortgage last.