[fzwang]

I second this. If you're trying to signal just on "I can code", then there will be fewer differentiating factors between you and younger people.

Typically, I don't think of software dev as an "industry" in itself, unless you're talking about dev tools etc, but that many industries depend on strong software. Your best bet is to target software problems related to your prior job. This way, your skillsets complement each other. You may not be the best at either side, but your ability to integrate the two could be a strong pt.