Cherim Tseev Email and Phone Number

Project for courier delivery, planning of the routes, tracking packages and contacting clients • Built RESTful and data integration services • Worked closely with analyst and QA team to sort out specifications • Reworked and refactored old services to apply to the current company's standards • Optimized a critical section of the project to eliminate the bottleneck in performance • Migrated the codebase from Java 11 to Java 17 • Implemented business logic, led the database design • Coordinated tasks across multiple teams • Covered the codebase with unit and integration tests

Project for house maintenance and property repairs • Responsible for the whole backend side of the project • Designed, built and maintained RESTful, SOAP, and data integration web services using Spring and Apache Kafka • Configured JDBC Source Connectors for data transfer using Kafka Connect • Wrote data processors with Kafka Streams and Spring Boot • Participated in the infrastructure design and configuration • Configured Kafka Cluster • Containerized all services with Docker • Configured CI/CD pipelines using Atlassian Bamboo and Kubernetes • Set up distributed tracing and centralized logging using Spring Sleuth and Grafana Loki • Optimized large report generators, migrated from JasperReports to POI, achieved ~30 times performance improvement • Optimized data integration services by re-configuring Kafka Streams properties and state store usage, achieving ~36 times performance improvement • Covered the functionality with unit tests • Documented infrastructure, service intercommunication, and dependencies • Participated in front-end side using React.js • Took part in planning out sprints • Communicated with analysts and project managers to clarify product requirements

Project for efficient automation of employee schedules. • Designed and built new features • Configured Spring Security • Wrote unit tests and documentation • Optimized the work process and branch management

Project to trace the imported goods and automate the document flow • Developed business logic and APIs • Participated in breaking up the monolithic application into microservices • Built and maintained client security services • Participated in architectural discussions and decisions • Eliminated service dependency on the client authorization service for internal requests, saw up to 5 times performance improvement • Optimized SQL queries, increasing core logic's performance by 15 times on average • Wrote unit tests and documented the codebase with Javadoc and Wiki

Project for optimization of phone billing expenses for client companies • Built and maintained RESTful web services • Migrated the project from MULE framework to Spring Boot, which has eased the development and testing as well as optimized the project's performance up to 10 times • Participated in implementing CI/CD in the project • Directly communicated with clients to coordinate future releases • Supervised and mentored a team of interns