Sunday, May 13, 2012

system knowledge about a Live financial system - 3 sources (GS

When you work in financial IT, real insights into a live financial [1] IT system comes from

A) hands-on experience, often local system knowledge
B) user interaction -- so you know the 80% of the codebase that aren't important.
B2) production problem solving, with user-impact or business impact. As explained elsewhere, these steers our effort to the key sections of codebase. 20/80 rule -- 20% of the codebase holds 80% of the system functionality, business logic and production issues.

Without B, you as a developer can be familiar with many sub-systems but without confidence to support users on your own, implement numerous changes, assess impacts, estimate effort, identify root causes... In many organizations developers aren't assigned such tasks, but GS was very different and very effective.

C) good domain knowledge -- This is required only in quantitative systems. Otherwise, I feel A+B will give us (system developers) more than enough domain knowledge. When C is relevant, then A+B will make you productive without "insight".

[1] including real-time trading systems, reporting systems, financial analysis systems, STP etc.

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New York (Time Square), NY, United States
http://www.linkedin.com/in/tanbin