Stack Exchange, the parent organization behind Stack Overflow, a question and answer site curated by professional programmers, has raised $40 million in a Series D round of funding. The investment was led by Andreessen Horowitz. Existing investors in the company including Bezos Expeditions, Index Ventures, Spark Capital, and Union Square Ventures also participated. The latest investment brings total funding in Stack Exchange to $70 million to date.

Stack Exchange says it plans to use the funding on Stack Overflow, as also its jobs site Stack Overflow Careers.

[Image courtesy: Stack Exchange]