• Middleware application based on microservices architecture for e-mail and sms sending from Metro to clients/employees• User interface with ReactJs & Redux and internal company-level components • 16 microservices and counting which communicate either synchronous via http requests (rest apis) or asynchronous through Kafka topics• Elasticsearch for storage• Java 11, Spring Framework (spring-boot, spring-data-jpa, spring-web, spring-security, spring-validation, spring-cache), Lombok, JUnit 5, Mockito, MockWebserver, KafkaStreams, Datadog for logs, metrics & alerts, micrometer, Kibana for data visualization, data schemas using Avro• CI CD stack:- Gitlab – Jenkins – Docker Images – Internal Kubernetes- Migrated to GitHub – Actions – Docker Images – Google Cloud Kubernetes• Unit tests, Integration Tests, Regression Tests, Stress Test, E2E Tests• E-mail & SMS Vendors integration: Sparkpost, Optimizely, Mailjet, RingRing, GTX

• Spring Boot, Spring Data JPA, Hibernate;• SQL Databases: Oracle 11g;• Schema management: Liquibase;• GraphQL Query Language;• Gradle • CI CD Pipeline with BitBucket, self-maintained & created Jenkins, docker images and Openshift

• Constant contribution to discussions regarding tasks requirements clarifications.• Onboarding, coordination and training for other team members• Contribute in the decision making process of cost calculations regarding computing power and necessary resources to release and scale• Contribute in discussions regarding architecture decisions • Agile - Scrum enthusiast

• 2D image drawing through the java graphics API;• Image compression;• Spring Boot, Spring Data JPA, Hibernate;• Graphical User Interface created using Vaadin 13 using the Model View Presenter (MVP) architectural pattern;• Knowledge of SQL Database: PostgreSQL;• Schema management: Flyway;• Logging and monitoring: DataDog + Micrometer;• Deployment: Jenkins, Docker, Kubernetes;• Development respecting SOLID principles;

• Writing java 8 code using Spring Framework for an application with graph database as main storage (in the beginning, then we migrated to PostgreSQL), built on microservices architectural guidelines;• Creating documentation and testing functionalities through unit tests, integration tests and end-to-end tests (regression tests -> Cucumber Behavior Driven Development);• Knowledge of NoSQL Databases: Cassandra, OrientDb;• Exposing RESTful APIs to communicate with other services using asynchronous clipboards;• Using deploy tools: Jenkins, Tomcat;Metrics: DataDog;Logging: Kibana;• Created performance benchmark for graph databases DataStax Enterprise Graph, Neo4j,OrientDb• Constant contribution to discussions regarding tasks requirements clarifications

• Created employees’ management application for learning purposes• Working in Agile Metodology, using tools like Jira and Confluence• Created a regression tests automation platform with java backend using jUnit tests triggered from a graphical user interface or automatically at a scheduled period using Jenkins jobs