Languages: TypeScript, Java, JavaScript, shell script, GraphQL, SQL, ruby.Tech stack: NestJS, NodeJS, npm, Micronaut, Shopify Platform, Git, Github, Github Actions, IntelliJ Idea, VS Code, DataDog, PagerDuty, Gradle, Azure Cloud, Teraform, JIRA, OAuth and Security, JWT, Docker, Kubernetes, Linux Shell Scripting.

Have been working on upgrade of retirement payments processing platform for the big client in industry (over 1 trillion of assets under management). Platform migrated from HAWC to Hybrid Cloud.Dev:• Made upgrade from Java 7 to Java 8 in 100+ modules and libraries• Moved Web Apps and Web Services from WebSphere to Tomcat including integration with Ping Federate• Spring and related dependencies upgraded from 3.2.10 to 5.2.16• Migrated EF deployment of file processing, Web apps & Services from on-premises to cloud servers• UI application packed to Docker image and migrated to Openshift with Conjur sidecar container to securely retrieve credentials from CyberArk• Fixed 200+ blocker and critical sonar issues across 100+ modules including possible places for SQL Injections• Developed Spring Boot REST Client and Server for test suite execution in ephemeral environment (AWS)Ops:• Automated developer local and CI/CD setups in a similar way• Reduced each build image size (up to 60Mb) and build time (2x faster for regression suite and 5x faster for uploading to Artifactory)• Documented and optimized build and deploy process for the appsLanguages: Java, JavaScript, Groovy, shell script, PL/SQLTech stack: Spring (MVC, Data, Core, Beans, Boot, Security), SOAP, Web-Services, JPA, Hibernate, JUnit, PowerMock, Git, Gitlab, Oracle, MongoDB, IntelliJ Idea, VS Code, Splunk, Lombok, Maven, Gradle, Ant, Artifactory, Jenkins, ElectricFlow (EF), JIRA, OAuth and Security, JWT, Tomcat, Docker, Kubernetes/Openshift, Linux Shell Scripting, AWS, Cloud.

Developed and deployed real time decision support and performance monitoring system for the City of Tyumen based on Pentaho BI (BI) and Pentaho Data Integration (aka Kettle - ETL) v7.1, reducing costs by $180k annually:• Integrated Spring Dependency Injection IOC among different layers of an application• Implemented DAO layer using Spring JDBC Module to call PostgreSql stored procedures from the application• Developed and supported RESTful Web services that support JSON using Spring Web services JAX-RS JSON• Created and implemented test plans and test cases based on the business requirements• Developed Log4j code for logging and written Ant script to build the application• Development of modules and OSGI bundles• Supported review and analysis of the Functional Specifications and Requirements Clarification Defects• Supported development of the UI using HTML, JSP, JS, J-Query, CSS, JSON and AJAX• DevOps: performed CI & CD process for ETL & BI systems from library to Docker image, prepared docker-compose deployment for ETL & BI applicationsAchievements and project examples:• Oversaw the process of merging 100+ issues from v7.1 to v8.2 of BI & ETL (count of supported libraries grew from 50+ to 80+)• Adopted existing mechanisms for securing ETL & BI applications by Single-Sign-On authorization based on Keycloak that resulted in 50% authorization speed increaseLanguages: Java, JavaScript, C#, TypeScript, GoTech stack: Spring (MVC, Data, Core, Beans, Boot, Security), REST, Web-Services, JPA, Hibernate, JUnit, PowerMock, TypeScript, Go, Git, PostgreSQL (PostgREST), MySQL, MS SQL, GWT, PrimeFaces, IntelliJ Idea, VS Code, Lombok, Maven, Ant, Nexus, JIRA, npm, Node.JS, Keycloak, PDI (aka Kettle), Pentaho BI, OAuth and Security, JWT, Nginx, Docker, Kubernetes.

Played a key role in the bank’s digital transformation by leading several work streams of the Centralization 2.0 project and acting as an individual contributor software developer:• Developed software in banking for private and corporate segments, online and file-based integration in a complex IT landscape across 17 different business units• Supported the development and replacement of 50 different systems of all kinds from several regions in a centralized system; merged 17 IT infrastructures to 11• Improved bank’s client data base by removing/merging numerous duplicates, streamlining reporting and as a result drastically improving the efficiency of client interactions and statutory reporting• Migrated parts of legacy monolithic application into micro-services using Java• Implemented DAO layer using Hibernate to call Oracle stored procedures and queries from the application• Developed API for services with fixed DTO objects serialized into Base64 for reducing message size in MQ• Realized conversion from DTO to XML using JAXB framework for outside bank and government systems• Created and implemented test plans and test cases based on the business requirements• Supported review and analysis of the Functional Specifications and Requirements Clarification Defects• Created and adopted PL/SQL packages, wrote and optimized SQL query for Oracle• Implemented 24/7 solution use cases such as bill payments and card less withdrawal for the clients and governmentLanguages: Java, PL/SQL, JavaScriptTech stack: SOA, JEE technologies, Spring Core/Beans, Hibernate, JUnit, GIT, Maven, Nexus, Tomcat, Oracle, Oracle RAC, Advanced Queue, IBM WebSphere MQ, Rabbit MQ, XML/XSD/XSLT, SOAP, Kafka, JIRA, UML, Altova XMLSpy

• Developed software for filtration models design including graphic and statistical analysis, automated reporting process and enabled project setup time reduction of 50%• Developed a tool for processing queue of calculations for different models, enabling use of downtown and doubling processing capacity for a project • Developed a mathematical model and a program tool for calculation and visualizing of wells geological data and its mapping on filtration cube cells • Built sophisticated 2D and 3D visualization models for mining wellsLanguages: C#Tech stack: OpenGL, Oracle, SVN, TFS, Visual Studio, ReSharper