Shenyang Mxnavi Co.,Ltd Feb, 2012 - presentSenior Software Engineer Refactored the road restriction module. Improved efficiency of road calculation programs by performing code refactoring. Designed and implemented the module of real time traffic, including data updating, data retrieving and data matching. Managed to optimize the process of retrieving restriction data from the cached database. Communicated with development engineers and recommended solutions.iOS Developer: Responsible for development of existing and new Iphone Applications. Managed a team of two full time software engineers. Designed and developed the iOS navigation product. Coordinated with designers to implement User Interface. Developed solutions to improve the product's user experience. Assisted in the development of the navigation sdk, including gesture recognition and road calculation.Software Engineer: Developed solutions to convert the map data from gdf to shapefile format in order to analyze and display geospatial information using QGIS. Improved the process of making the navigation map data through program optimization. Developed and maintained several tools to test and verify the navigation data. Performed validity checking to ensure accuracy of the navigation data. Took business travels to give feedback about quality issues to the map data provider.Other: Performed as an English teacher and contributed to training activities inside the company. Translated several design documents from Chinese into English and some blogs from English into Chinese. Please refer to https://my.oschina.net/randy1986 Responded to engineers' questions and helped them resolve problems.