Develop and maintain online service for applying ML models to the stream of incoming Amazon Prime videos. Design and develop service for ML processing of videos at Amazon Prime Video catalog scale (4M+ video hours). Delivered:* 25x increase in video sampling performance* 2x scalability increase for inference using deep ML models Tech: Java, primarily leverage serverless AWS stack (S3, DynamoDB, Lambda, StepFunctions, ECS, SageMaker, CDK, CloudFormation, CloudWatch, IAM, etc.).

Design and implement REST APIs for web and mobile frontends of video conferencing product. Add new features into video conferencing platform (like automatic microphone mute of all people in the room if one person starts to speak). Load testing of REST APIs (used Gatling tool for that). Technologies: Kubernetes, Spring, ReactJS, AWS (Kinesys, VPC), Jitsi, Core Java, Kotlin.

Java Microservices development, MongoDB, Neo4j, Apache Kafka, Spring Framework, Docker, OpenShift, Apache Camel, python

Work on different projects as a remote contractor for Trilogy Group. Responsibilities: analysis of new features implementation, create architectural memos (e.g. on implementation details), provide technical guidance for other team members, code reviews, features implementation. Technologies: AWS (S3, EC2, Dynamo, RDS, Lambda, ECS, etc), Java, Spring, AngularJS, Grafana, Graylog, Jenkins, Docker.

Develop and maintain new and existing features for server­side of 350M+ userbase internet messenger. Working in international environment in Mountain View, CA and Saint-Petersburg, Russia. Technologies: Java, Spring, JMS, MySQL, MongoDB, Memcached, Tomcat, Netty, Hibernate, NewRelic, Graphite.

Worked on multiple projects, including:1) Design and implementation of reliable UDP-based protocol to transfer large data chunks to and from Set-Top Boxes. This protocol was built-in as transport-level protocol into established protocol stack. Protocol is implemented as Netty handler with transfer control and loss control. 2) Add authentication into REST API for some services. Used Spring Framework (IO, MVC)3) HBase-backed admin dashboard built as a webappTechnologies: Core Java, Scala, Spring, Play Framework, Mongo, Netty.

Design and develop adserving platform for mobile traffic. I designed system architecture and implemented many system moduled for scalable distributed highly available mobile advertising platform. Also served as team lead, provided trainings, did hiring interviews, team management, planning, product owners reporting etc. Key performance metrics: 10K simultaneousconnections, with 120 ms max latency were successfully met. Technologies used: Java, Scala, Tomcat, Spring Framework, Akka, Play Framework, Mongo, Redis, Web services with Apache CXF, MySQL, Hibernate, ELK (Elasticsearch-Logstash-Kibana).

Lead amall team of developers (3 ppl).Created infrastructure from zeroDeveloped and run into production multiple software projectsAnalytics and development, reporting1) Created from ground zero infrastructure for documents storage and processing and shipped it into production2) Created from ground zero Software for Preliminary Information about Sea Cargos and run into production 3) Redesigned software for Preliminary Information about Truck Cargos and run into production4) Communication with Clients5) Solved multiple technical problems while implementing these projectsTechnologies: Glassfish 3.1, JMS, Spring, Hibernate, PostgreSQL 9.x, MongoDB, CryptoPro JCP, JAXB, Python scripts, x509, data security.

Project: Deutsche Bank trades processing system (Tracer)Weblogic-based app for processing trades and tracking trade lifecycle.Technologies: Spring, JMS, EJB, SybaseResponsibilities: analyze business requirements, develop estimates and project plan, risk analysis, team management, communication with DeutscheBank managers, development, user-acceptance testing (UAT) involvement.Deliveries: successful major release (6 months teamwork) of the software (development, testing, UAT, deployments)Contact/manager: Kshamatha Madhukar, DB NYCProject: Market data distribution softwareWeb-based app for traders (both client- and server-side).Technologies: GWT 2.x, Spring Framework, SOLR, Maven, Jetty.Deliveries: released two major releases of software

September 2009 - December 2010http://evaphone.ru, Java/JavaScript engineer.Project: Site http://evaphone.ru (september 2009 - july 2010)Delivery 1: integration of Electronic payment systems (Moneybookers, Webmoney, Yandex.Money, Robokassa)Delivery 2: Successful major release of new version of softwareDelivery 3: successful minor releasesProject: Evaphone AdServer (august 2010 - december 2010)Delivery 1: Full use-cases suite and business process document developmentDelivery 2: Web UI establishment, design and implementation (used ExtJS framework)Delivery 3: Security system establishment, design and implementation (permission-based security, permissions are grouped in plain system of roles)Delivery 4: developed modules: users, user roles, common data management,Delivery 5: developed ExtJS UI widgets - date interval picker, category picker, region picker.Delivery 6: develop infrastructural things (concurrent modification control, errors reporting, logging system)Technologies: JavaScript, Java, Spring Framework, ExtJS, DWR, Spring, BlazeDS, Action Script, Adobe Flex, PostgreSQL, Tomcat, JBoss AS, voip, asterisk.

Responsibilities: develop front-office software for SberBank. Technologies: JSP/Servlets, Struts 1.3, JDBC, XML, Ant, CruiseControl, Apache Commons Libs, EJB, WebSphere AS, Oracle.

Strength analysis of bridge parts.Technologies: AutoCAD, Midas Civil, Russian bridge design codes (SNiP 2.05.03-84*)

Worked in Russian Engineering Center of Pratt & Whitney Canada.Responsibilities: strength analysis and fatigue calculations of gas turbine engines details. Maintained and developed life calculation spreadsheet, which combines both stress- and strain-based Low Cycle Fatigue analysis. Technologies: ANSYS, Catia v5, Fatigue Analysis (both Stress- and Strain-based approach), MSC MVision, VBA in MS Excel.

Developed SaaS solution for environmental labs. Managed database, developed data grabbing utilities for database fullfillment.Technologies: Java, Hibernate, MySQL, Apache Ant.

Develop system for summer schools management and administation. Responsibilities - develop database schema, server-side part, view templates.Technologies: (Apache Turbine + Apache Torque + Apache Velocity), Tomcat, MySQL, JFreeChart, Jasper Reports, Apache Ant.