We can check the gender ratio [1] of the subreddit /r/hackernews (assuming the two have the same audience distribution). Unfortunately, the subreddit does not appear on the gender ratio page.
[1] http://bburky.com/subredditgenderratios/
If you check related subreddits,
/r/startups - 86:14
/r/sideproject - 91:9
/r/programming - 93:7
/r/webdev - 89:11
/r/cscareerquestions - 83:17
/r/netsec - 96:4
/r/technology - 85:15
Based on these numbers 10:1 seems like a good guess.