Dmitry Vasilyuk Email & Phone Number

Warsaw, Pl

- analysed functional and non-functional requirements for projects and incorporate them into the end products- created high-level mockups and project documentation- prepared technical design and architecture from monolith to microservices- provided team management- reviewed code of customer's projects based on Java and Spring ecosystem- prepared guidelines with best practices for different kinds of development aspects (Java performance, Exception Handling, REST API etc.)- conducted training sessions on cloud-native development based on the IBM Bluemix platform- engineered multi-tenancy in the applications- developed security based on OAuth2 authorization and JWT authentication- developed security based on TLS + Basic Auth- implemented video streaming based on the HLS protocol- implemented video fragments and snapshots capture from the IP Camera- implemented event processing of the IP Camera's alerts- adjusted communication with Smart Socket devices through eWeLink + IFTTT server- implemented calculation of various metrics regarding fiat and cryptocurrencies- integrated Identity Verification provider (Acuant) with the application- implemented mock-server module for third-party products with REST API - developed SMS and email notifications for various events in the application- created reports in Excel and PDF formats- implemented aggregation and analysis of the following meteo data: WRF forecasts and map images, weather stations, satellite images, and radiosondes.- implemented PoC for microservices based on Netflix OSS (Service Discovery/Registry, Circuit Breaker, API Gateway)- developed module for managing resources (keyspaces, schemas, vhosts) and users in MariaDB, Cassandra, RabbitMQ

- reorganized API endpoints to establish a more modular and maintainable architecture, minimizing dependencies between functionality and microservices. - implemented OAuth 2.0 and JWT authentication based on Spring Security 6 and Spring Authorization Server.- applied Apache Kafka for handling notifications from different sources.- enhanced exception handling.- created integration tests utilized Testcontainers to emulate third-party tools behavior (e.g. Apache Kafka).- adjusted performance of the GraphQL queries by optimization of transferred data volume, pagination, and more efficient data fetching.- optimized local deployments (by refactoring a properties start-up approach for all the modules) - thus, reducing the amount of effort needed.- prepared guidelines with best practices (exception handling, REST API, security, etc.) for the team members

- analysed business requirements- created high-level mockups and project documentation- prepared technical design and architecture- implemented Android application for managing daily activities - implemented Web application (Java and JSP) as a management portal for the Android application- set up CI/CD process (Jenkins CI)

- analysed business requirements- provided team management- delivered a responsive user interface design- supported back-end operations over various graphical objects (an ellipse, a rectangle, a marker, etc.)- provided ongoing post-production support

- implemented attachments handling functionality- developed XSDs generating for various types of business objects- implemented download functionality with multiple files as a ZIP archive- delivered a configuration manager that enables a dot-based notation to access properties- designed and implemented a JMX Monitoring tool to calculate the execution time of methods and integrated with Hyperic HQ Enterprise