In Silicon Valley, start-ups and tech giants are as ubiquituous as the software engineers who come to work for them.

But because these engineers are so in-demand, it often creates a recruiting battle between the old guard and the promising young start-ups. Even worse, because all these companies are on the lookout for fresh talent, they put much of the power in the hands of engineers. 

To that end, LinkedIn compiled its second-annual list of the Top 10 InDemand Startups, basing its ranking on LinkedIn activity between more than 287,000 engineers from the Bay Area. This list shows which Silicon Valley start-ups are winning the battle for top talent -- perhaps you've heard of a few of them. 

Develops and distributes Hadoop, an open source software that supports the data processing engines of many popular websites. Cloudera added Tom Reilly as CEO in June 2013 and closed a $65 million Series E funding round in December last year.

The cloud-based file sharing service founded in 2007 hit 175 million users earlier this month and closed a massive $250 million funding round in 2011.

A provider of all-flash storage systems, Violin Memory works to improve memory on computers. It also received $96.2 million in Partial Close funding in February of this year.

This start-up produces and distributes flash-optimized storage products that combine flash technology with high capacity drives. Nimble Storage closed a $40.7 million funding round in 2012. 

A commercial vendor for Apache Hadoop, an open-source platform for big data, Hortonworks closed a $50 million funding round in June 2013.

This company produces a line of wearable, high-definition cameras and accessories.

Jawbone makes wearable technology and audio devices such as the Jawbone ERA and ICON Bluetooth headsets. Jawbone acquired BodyMedia and Massive Health earlier this year. 

Founded in 2010, Big Switch Networks brings virtualization to networking with its model of Open Software-Defined Networking and closed a $25 million funding round in 2012. 

The social networking site where users “pin” photos received $200 million in Series D funding in February this year.

Nutanix offers integrates storage and servers into one platform. The company's raised $71 million in three funding rounds since April 2011.