1/ It's not widely understood outside the industry how prolific software developers need to be at successful trading firms and quant hedge funds.
The tech involved, comments on developing software at Jane Street, and differing approaches to software between finance and big tech:
the growing popularity of machine learning had a large negative impact on the average quality of applied finance projects in the MFE program I taught in -- we would warn teams extensively of the pitfalls but still 30% of them turned into exactly this