John Crater

• Developed Java applications for backend services as well as Salesforce/Apex pages, controllers, triggers and classes, including test methods, to customer specifications according to industry best practices. Also experienced with developing Apex batch programs, REST/Web Services, Javascript, HTML, CSS, Node.js, Lightning Web Components, and integrating Salesforce with external applications and services. Maintained and enhanced Java based resume parser service.

• Design and develop enterprise Java programs, REST based web services and Hadoop Map-Reduce jobs. Designed and developed REST based web services in Java for accessing external data in both PostgresSQL and HDFS. Also included necessary business logic. Designed and developed Hadoop map reduce jobs in Java. These jobs could be configured, executed and monitored via REST web service calls. The problem domain involved in excess of 10 million credit cards and over a billion transactions. Skills: Hadoop, Hive, Java, REST, PostgreSQL

• Primary architect of Digital Reasoning's 'Synthesys' SDK. Synthesys is a technology platform for performing unstructured data analytics. It is capable of entity categorization and resolution and semantic analysis of text documents. This role involved a complete design of a high performance, scalable, multi-user architecture for this technology base that is easily integrated by client applications and available as both a simple Java Jar file or as a Servlet engine based server. Worked as a lead developer expanding Synthesys scaling capability using Hadoop to perform intensive analytics in parallel and storing the results in a variety of distributed NoSQL back ends including Cassandra and HBase. Skills: Java, Hadoop, Cassandra, Maven, Amazon Cloud, HDFS

Software Development in C and Java using Oracle and SQL Server.