Sergey Kostin Email & Phone Number

Moscow, Russian Federation

Working within teams with a really enthusiastic person of excellent specialists, my role as one of the leading developers was managing hosting environment, including database administration and scaling an application to handle changes and, as consequence, reductions of loads. That allowed us to optimize our infrastructure developments in ready, working cases in almost all of Central Europe. Designed a BigData solution that collected and analyzed sensor data from wireless data acquisition systems installed on the plunging and drilling systems. This involved real-time and batch prucessing using Hadoop, Flume, MapReduce.Key success:• Parallel work in three projects on implementation of information systems with backend development teams working on complex development projects;• Using methods of data mining/machine learning to create new and improve existing automated systems;• Analysis of the effectiveness of existing solutions, evaluation of the implementation of new algorithms;• Fixing bugs and issues in existing production support platforms;• Regular designing and developing complex, scalable web-based tools using Scala and Java;• Experienced user with source version control software (Subversion, Git);• Development of efficient code and scalable database structures in order to support high server request volumes;• Performing code reviews;Job purpose and key deliverables:• Controlled the coordination of resources, provide technical support;• Designing, creating and managing client databases and relational databases is highly desirable PostgreSQL, MySQL and Linux;• Ensure that all project goals are accomplished according to specifications and business objectives;• Preparation of technical documentation for developed software;• Java, RDBMS, OOA/D, JUnit;• Scala - Play Framework, AKKA;• Microservices, devOps, Cloud;• PostgreSQL, MySQL and Linux;• Docker/Kubernete 5;• Big Data, Spark and Streaming/IoT;• ElasticSearch, Kibana and Logstash 5;

Moscow, Russian Federation

Key success:• Installation and integration database management systems (RDSMS) such as RDSMS Oracle, Oracle E-Business Suite R12, Oracle Storage Cloud Services (Object Storage, Archive Storage), Oracle Database Backup Service and Oracle Public Cloud Data Transfer Services;• Synchronization database for easy, shared access with the use of a cloud storage system Dropbox Paper;• Creating and maintaining automated tests and architecture design server applications, databases and protocols;• Develop and support flexible and sustainable back-end systems based on Java | Scala;• Completed load and performance testing of extremely complex systems;• Developed and implemented changes in the process of reconciliation of payables and receivables. As a result, the verification time was reduced from 50 to 10 minutes;Job purpose and key deliverables:• Controlled the coordination of resources, provide technical support;• Monitored developed applications and fixed bugs;• Ensure that all project goals are accomplished according to specifications and business objectives;• Preparation of technical documentation for developed software;• Create development “bug” reports, FAQ’s and knowledge base articles as appropriate;• Actively interacted with system analysts to resolve issues on the company's current projects: the analysis of architectures of information systems integration and customer databases of the company;• Support solutions and software support of the projects key customers;Key customers: Coca-Cola, H&M GB, Adamas, Inventive Retail Group, Crocus City Oceanarium, Hypermarket Tvoy Dom, Wimm-Bill-Dann FoodsWork experience with:Windows Server, Android, iOS, MacVirtualization (VMware, Microsoft, Hyper-V),Microsoft platform network services (DNS, DHCP, PKI and other), Active Directory, IIS

Moscow, Russian Federation

Key success:• Writing J2EE applications in accordance with the specifications of J2EE to enable inside these servers;• The integration and development of business solutions based on database management products ERP SAP R/3 and Oracle E-Business Suite R12;• Thanks to reconciliations managed to reduce accounts receivable among clients 25%;Job purpose and key deliverables:• Engaged in the creation of articles for technical issues;• Design, develop, and deliver great software solutions in agile framework;• Daily practice in Web development using software tools like Play, Lift, Bootstrap 3, Java 8, Spring Boot, Spring Data JPA, Packing – WAR/JAR, creating micro services;• Support solutions and software support of the project;• Development architecture platform solutions, software modules and integration applications;• Preparation of technical documentation for developed software;• Conducted workshops and webinars for employees of various departments of the company;• Interacted with key customers in coordination with the dates of the educational seminars, webinars, conferences and certificates are issued on completion of training;Key customers: Megafon, NetByNet Holding LLC, Yota, Megafon North-West, Tele2, Vimpelcom ltd., Rostelecom, MTS, Lukoil, Rosneft, Gazprom Energo

Moscow, Russian Federation

Key success:• Design and development of system software modules for technological software platforms Java SE, Java EE;• Development of application layer software modules for the complex, including territorially distributed information systems;• Development of integration modules for interaction with third party systems (Java, XML, JSON, REST);Job purpose and key deliverables:• Design and development of the system functionality algorithmic trading based on business requirements;• Rapid prototyping and implementation of the tasks in code; • Participation in the development of architecture;• Implementation of high volume systems with fast response time;• Optimize performance of PostgreSQL database (SQL) and queries to it via JDBC (Java);