Experienced hands-on technological guru & code ninja. Major open-source contributor. Writer, speaker & podcaster. High expertise with React, Node.js, Go, React Native, distributed systems and infrastructure (Hadoop, Spark, Docker, AWS, etc.).Github: https://github.com/jondotBlog: https://medium.com/@jondotTech:* Node.js, React, Go, JVM, React Native, Ruby and Rails.* Stores: RDBMS, Elastic Search, Cassandra, Redis, RabbitMQ, MongoDB, and more.* Frontend: Everything React* Mobile: React Native, Android, iOS (Swift)* Cloud: AWS, Docker, and GCE.* Big data: EMR, Spark, Hive, Impala, Pig. * Data science: analytics, machine learning, and feature extraction / ETL via my own tooling and frameworks (open source).Design / Architecture:I strive to build things quickly, with thoughtful design, where performance, correctness, and developer experience converge.* Designed and implemented major architectures top-to-bottom in the domains of search, crawling, information-retrieval, NLP, analytics / bigdata, and more.* High expertise in designing and implementing elegant architectures for both server-side and client-side products (Mobile)* Experienced in Domain Driven Design, TDD, BDD and the whole *DD shebang; systems design through day to day design problems. Agile believer, pragmatic, and polyglot practitioner.Open Source:Major open-source contributor, built products, supporting communities around my products, and contributed to other major products.* Doing it since 99'* One of the early Ruby adopters in Israel (since 2006), and a Rails contributor* Built many open source products such as Sneakers, Graphene, and other popular open source libraries in Ruby, Node, Javascript, Clojure, Go, and more.Hacking:Spent most of my childhood hacking (mid-90's), reverse engineering, and when you add hardware to it, things become very interesting.* Reverse engineering* Security, pentesting* Electronics hacking and robotics / IoT (Arduino, RaspberryPi)