Developed and maintained various of micro-services for product https:// oneio.cloud/; Java8, Spring, SpringBoot for back-end and Angular.js and angular for front-end.

• Developed features and fixed bugs using Java8, Angular.js, and Angular.
• Implemented unit and E2E tests on both front-end and back-end.
• Conducted code review.
• Technologies used: Java 8, Spring, Spring Boot, Feign, JUnit, AssertJ, Maven, AngularJS, Angular, TypeScript, Karma, Jasmine, NodeJS, NPM, Yarn, Swagger, MongoDB, Jenkins, JFrog, NewRelic, PaperTrail, Docker, Kubernetes, AWS, AWS Serverless.

Designed and developed brand new micro-services for replacing old user front-end and back-end for product https://oneio.cloud/. 

• Developed 2 micro-services completely from scratch; Angular 7 for front-end and Spring Boot with Project Reactor for back-end.
• Responsible for prototyping and first implementation.
• Created features using Java 11, Kotlin, SpringWebFlux, and Angular 7.
• Implemented unit and E2E tests on both back-end and front-end.
• Conducted code reviews.
• Technologies used: Java 11, Kotlin, Spring Boot, Project Reactor, Feign, JUnit, AssertJ, Maven, Angular 7, TypeScript, Karma, Jasmine, NodeJS, Yarn, Angular-CLI, MongoDB, Jenkins, JFrog, NewRelic, PaperTrail, Docker, Kubernetes, AWS, AWS Serverless. 

Designed and developed WEB-portal for maintenance of communication stations.

• Developed server-side on Grails and is engaged in providing data from SAP.
• Developed client-side on Angular 1.6 using TypeScript.
• Created features using Groovy (Closures, DSL, AST transformations), Grails (Plugins, GORM, GSP), Angular 1.6 with TypeScript (Directives, Components, Services).
• Implemented unit and E2E tests on both front-end and back-end.
• Designed and developed code architecture.
• Configured Jenkins for CI and deployment automation.
• Configured ELK-stack.
• Technologies used: Groovy, Grails, Angular, TypeScript, REST, Gradle, Spock, Geb, Jasmine, Karma, NodeJS, NPM, Swagger, ELK- stack (Elasticsearch, Logstash, Kibana). 

Designed and developed WEB-administration panel for service paketchef.de.

• Developed server-side using Java 8 and Spring Boot and client-side using Vue.js.
• Developed features using Java 8 (Streams API, Lambda) and Vue.js.
• Implemented unit and E2E tests on both front-end and back-end.
• Developed code architecture.
• Configured Jenkins for CI and deployment automation.
• Technologies used: Java 8, Spring Boot, Hibernate, PostgreSQL, Vue.js, REST, Gradle, JUnit, NodeJS, NPM, Jasmine, Karma, Nightwatch.js, Webpack, ESLint. 

Designed and developed Cloud Billing project.

• Developed a micro-service for a public API run on Java 8 and Spring Boot.
• Created features using Java 8 (Streams API, Lambda).
• Implemented unit and E2E tests on both front-end and back-end.
• Developed code architecture.
• Technologies used: Java 8, Spring Boot, Spring Batch, MongoDB, Redis, KeyCloak, KillBill, Swagger, REST, Maven, JUnit, Docker, Jenkins, Nexus. 

• Developed a SOAP web application that was designed to process database requests using Spring, Maven, WildFly, and ElasticSearch.
• Implemented a SOAP web application that was designed to proxy the request from one service to another and map the data in case the request type conflicted in different systems.
• Created a web-based application with an interface based on PrimeFaces and designed to automate business processes in a company.
• Technologies used: Oracle Database, ElasticSearch, Java EE, JSF, EJB, JPA Hibernate, SOAP, Servlet, Gradle, GlassFish. 

• Developed a web application using C#.
• Performed customization and plugins for Microsoft Dynamics CRM and Microsoft SharePoint.

• Developed a web-service in Java.