Denis Andreev Email and Phone Number

Application development for iOS (version 12.* and below). • Working with XCode 13.* • Ensure the performance, quality, and responsiveness of applications • Collaborate with a team to define, design, and ship new features • Identify and correct bottlenecks and fix bugs

• Application development for iOS (version 12.* and below). • Working with XCode 10.*, 11.*, 12.* • Design and build applications for the iOS platform • Ensure the performance, quality, and responsiveness of applications • Collaborate with a team to define, design, and ship new features • Identify and correct bottlenecks and fix bugs

Application development for iOS 10.* and below versions. Working on XCode 10.*Requirement understanding and analysis, Design discussions, Flow diagrams creation, design patterns, code optimization, performance improvement, complex custom implementations, unit testing, debugging, crash analysis.

Application development for iOS 8.* and below versions. Working on XCode 7.*, 8.*, 9.*, 10.*Requirement understanding and analysis, Design discussions, Flow diagrams creation, design patterns, code optimization, performance improvement, complex custom implementations, unit testing, debugging, crash analysis.Using Object Oriented Methodologies and Agile methodology in developing the applications. Using MVC, Singleton, Delegate, Facade, Observer patterns for application development. Designing and implementing UI with/without XIBs/Storyboards, using View animations. Developing Asynchronous/Multithreaded applications using GCD/Blocks, using ARC, toll-free bridging etc. Using advanced concepts like UI State restoration, Archiving/Unarchiving, Predicates etc. Exploring the new iOS frameworks/technologies and implementing POCs. Using latest Network APIs(native/Third Party)/Libraries to develop network related applications.Writing Unit test cases/Automation scripts, performing code coverage, profiling, symbolicating, finding zombie objects, finding memory leaks, Cpu and Memory utilisation and performing advanced(conditional) debugging for the application.

Maintenance of core network: commissioning of active and passive network equipment, routing, load monitoring; Commissioning of communication nodes and the execution of the necessary predesign and design work; Application developing for company infrastructure on Go(Golang),Obj-C(iOS, macOS). Developed a generator reports of billing system.Server administration with VMWare ESXi and OS Linux.Head of Technical Department.

Developed UI on the Java with using framework SmartGWT for network control system.

Setting up a company network and connectivity between branches; Installing new servers on WIndows Server 2003; Set up maintenance and backups; Trained operators on the new system.

Обслуживание 1С предприятие версии 7.7