This post is a case study of my latest project. The resultant product is a pair of websites designed for new Bitcoin (a crypto-currency) users. I laid the ground work of inbound marketing in September (3 months ago) along with market research and planning. It is not until recently I started the design and development in anticipation of a full rollout planned in the coming year 2014. The websites, bitcoin-tw and bitcoin-en, are partially live and open to the public as of this writing.

Given an array with integers, find the largest sum of continuous subarray. This maximum subarray problem was first posed in 1977. Jay Kadane solved it in linear time (O(n)) in 1988.

The role of product manager is viewed as a business function to maximize ROI in the product, maximize market share, revenue, etc. for business success. Product managers work with engineering and across the business to make sure the software product is well built and defined. 

I personal think an entrepreneur should be a product manager in his soul with product manager skills.

What does a product manager do?