Walter Molina is a UI and UX developer from Villa Mercedes, San Luis, Argentina. His skills include, but are not limited to, HTML5, CSS3, and JavaScript. He uses these technologies at a Jedi/ninja level (along with a plethora of JavaScript libraries) in his daily work as a frontend developer at Tachuso, a creative content agency. He holds a bachelor's degree in computer science and is a member of the School of Engineering at local National University, where he teaches programming skills to second- and third-year students. His LinkedIn profile is https://ar.linkedin.com/in/waltermolina.

Shilpi Saxena is an IT professional and also a technology evangelist. She is an engineer who has had exposure to various domains (IOT and cloud computing space, healthcare, telecom, hiring, and manufacturing). She has experience in all the aspects of conception and execution of enterprise solutions. She has been architecting, managing, and delivering solutions in the big data space for the last 3 years; she also handles a high-performance and geographically distributed team of elite engineers.

Shilpi has more than 14 years (3 years in the big data space) of experience in the development and execution of various facets of enterprise solutions both in the products and services dimensions of the software industry. An engineer by degree and profession, she has worn various hats, such as developer, technical leader, product owner, tech manager, and so on, and has seen all the flavors that the industry has to offer. She has architected and worked through some of the pioneers' production implementations in big data on Storm and Impala with autoscaling in AWS.

Shilpi has also authored Real-time Analytics with Storm and Cassandra ( https://www.packtpub.com/big-data-and-business-intelligence/learning-real-time-analytics-storm-and-cassandra )  and  Real time Big Data Analytics ( https://www.packtpub.com/big-data-and-business-intelligence/real-time-big-data-analytics ) with Packt Publishing.