Recommended expert

Rodrigue Kelen-yo

Fullstack Development

Rodrigue Kelen-yo
Bobenheim-Roxheim, Germany

Experience

Dec 2023 - Present
2 years 2 months
Germany

Fullstack Development

Bavarian State Office for Taxes

  • Created an as-is analysis of the existing Oracle application Express admin interface
  • Created a requirements analysis for the React admin interface to be developed
  • Developed the new MÜSt Admin interface using React and TypeScript (frontend) as well as Java 17, Spring Boot, and Hibernate (backend)
  • Conducted a final training including training materials to transfer knowledge to the client's employees and ensure they can maintain and further develop the software independently
  • Created detailed technical documentation
  • Tools: KONSENS-AppKit, SPA, React, TypeScript, REST API, unit testing, Java, JavaScript, Node, HTML5, CSS3, UI/UX, Spring Boot, OpenAPI, JSON, Oracle DB, GitHub CI/CD, Playwright, UML, Gradle
Apr 2023 - Nov 2023
8 months
Germany

Fullstack Development

DB NETZE

  • Developed a planning application
  • Supported the existing Scrum team
  • Split: 50% frontend and 50% backend development
  • Tools: React, Redux, TypeScript, SPA, REST API, unit testing, JavaScript, Vue, Node, HTML5, CSS3, ARIA, UI/UX, Java, Spring Boot, OpenAPI, JSON, AWS, PostgreSQL, GitLab CI/CD, Cypress Test, unit test, DevOps, Kubernetes, ArgoCD, UML, Kafka, Postman
Jan 2022 - Mar 2023
1 year 3 months
Germany

Backend Development

KKH

  • Implementation of new legal requirements as part of EESSI
  • Supported and advised product owners in preparing business specifications and reviewing them
  • Developed batch processes
  • Software testing
  • Software maintenance (reproducing error reports, correcting the software)
  • Tools: Java 8, Spring, Spring Batch, SOPA, REST, JPA, Hibernate, JSF, XML, Eclipse, DB2, SVN, UML
Jan 2021 - Dec 2022
2 years
Germany

ERP System Migration

Seeburger AG

  • Backend development with Java and JBoss 7
  • Frontend development with React based on the Material-UI framework
  • Tools: Java, JEE, EJB, Python, JBoss, Oracle DB, Swagger, REST API, JUnit 5, Selenium, Maven, React, SPA, AG-Grid, TypeScript, Material-UI, Bootstrap 4, HTML5, CSS3, UI/UX, JSON, Gerrit, Jenkins, Jira, Confluence, Webpack, ESLint, Prettier, IntelliJ, Docker, UML, Postman
Feb 2020 - Dec 2020
11 months
Germany

Frontend Development

Deutsche Bahn

  • Developed a train view to display train events
  • Automated deployments
  • Tools: React, Redux (MobX), SPA, TypeScript, ESLint, Webpack, Chart, Chakra-ui, Canvas, Atomic Design, REST API, unit testing, Java, JavaScript, GraphQL, Node, HTML5, CSS3, UI/UX, JSON, Spring Boot, Swagger, API-Gateways, Kafka, Architecture, DevOps, Cloud, AWS, OpenShift, Docker, GitLab CI/CD, UML, Active MQ
Oct 2019 - Feb 2020
5 months
Germany

Mobile App Development with React Native

  • Development of a mobile app with React Native
May 2019 - Nov 2019
7 months
Germany

Frontend Development

Black Olive Advisors GmbH

  • Development of a web application for brokers and clients to manage office spaces
  • Tools: React, Redux (MobX), ReduxStore (Storefront), SPA, Thunk, Material-UI, Formik, Next.js, Angular, ESLint, Webpack, REST API, JSON, unit testing, JavaScript, Node, HTML5, CSS3, Jest, Swagger, API gateways, cloud, AWS, UML, Postman
Nov 2018 - Mar 2019
5 months
Germany

Fullstack Development on MapCreator

HERE GmbH

  • Fullstack development in the MapCreator project
  • Tools: React, Redux (MobX), SPA, ReduxStore (Storefront), Saga, TypeScript, ESLint, Webpack, Canvas, Formik, Bootstrap 4, REST API, JSON, unit testing, jQuery, JavaScript, Node.js, HTML5, CSS3, Jest, Swagger, API gateways, continuous deployment, cloud, AWS
Apr 2018 - Dec 2020
2 years 9 months
Germany

Magnolia CMS Development (1 day/week)

Fink & Fuchs

  • Development and customization of Magnolia CMS solutions in a part-time role
Sep 2017 - Oct 2018
1 year 2 months
Germany

Continuous Delivery Platform Development

Commerzbank AG

  • Development of a continuous delivery platform
  • Tools: Spring Boot, Swagger, API gateways, Kafka, Splunk, Java, Git, Bitbucket, Jira, HTML, CSS, JavaScript, ESLint, Webpack, React.js, Angular, Node.js, JSON, Oracle DB, microservices architecture, cloud, Scrum, continuous delivery, event-driven systems, Hibernate, OAuth2, Docker, Tomcat, Cucumber, Selenium
Jun 2017 - Aug 2017
3 months
Germany

Fullstack Development

REWE-Digital GmbH

  • Fullstack development with Magnolia CMS and JSP templating
  • Tools: Java, Tomcat, Git, Stash, Jira, HTML, CSS, JSON, JavaScript, Backbone.js, Node.js, Bootstrap, Responsive Design, UI/UX
Apr 2017 - Jun 2017
3 months
Germany

Development of a chatbot for a large German bank

IBM Client Innovation Center GmbH

  • Development of a chatbot using Watson Conversation and Watson NLP
  • Integration on Bluemix
  • Frontend with React.js + Redux (MobX)
  • Tools: Node.js, Webpack, Gulp, Java, JavaScript, HTML, CSS, ESLint, Angular, REST-API, OpenShift, Git, Eclipse, Bitbucket, TeamCity
Jul 2014 - Mar 2017
2 years 9 months
Germany

Development of a tourism e-commerce platform

DER Touristik Online GmbH

  • Development and maintenance of web-based applications
  • DevOps and microservices architecture
  • Development of unit tests, acceptance tests and integration tests
  • Development of new CMS modules
  • Tools: Magnolia CMS, Templating, Java, Spring MVC, Apache Jackrabbit, Tomcat, Swagger, API-Gateways, ElasticSearch, Node.js, Next.js, REST-API, Unit-Testing, jQuery, JavaScript, HTML5, CSS3, ESLint, Webpack, Jasmine, Maven, Continuous Deployment, Jenkins, Git, Selenium, JUnit, Mockito, Cloud, Docker, Nginx, Chef, Bash-Script, Ruby, Confluence, Jira, UML
Aug 2012 - Jun 2014
1 year 11 months
Germany

Development and maintenance of web applications

Etecture GmbH

  • Development of new CMS modules and extension of existing modules
  • Support in content management and development of a client portal
  • Execution of unit tests and integration tests
  • Tools: PHP, HTML5, CSS3, Templating, Perl, Java, Java EE, EJB 3, JSF 2, JPA 2, CDI, JUnit, Mockito, Glassfish, jQuery, JavaScript, AJAX, MySQL, MSSQL, NoSQL, Scrum, Maven, Jenkins, Git, SVN, Jira, Confluence, Sonar
Feb 2011 - Jul 2012
1 year 6 months
Germany

Development of a reporting application in the HR environment

GIP mbH

  • Support and advise system analysts in drafting and reviewing functional specifications
  • Creation of IT concepts based on functional specifications
  • Implementation of software changes within the scope of enhancement projects
  • Software testing and maintenance (reproducing error reports, software corrections)
  • Tools: EJB, JSF, JPA, JAXB, Drools, JUnit, JBoss AS, Hibernate, MySQL, Oracle 10g, MSSQL, Scrum, Continuous Integration with Jenkins, Sonar
Aug 2010 - Jan 2011
6 months
Germany

Further development of a web application for the judiciary

Lunzer + Partner GmbH

  • Further development of a web application for the judiciary
  • Tools: Java, J2EE, Servlets, JSP, HTML, XML, XSL, JavaScript, CSS, SQL, Shell script, Oracle 10g, Apache Tomcat, SVN, Eclipse, Confluence, Jira
Feb 2010 - May 2010
4 months
Germany

Further training in Java/JEE and a reference project

IBB Institut für berufliche Bildung

  • Java web programming for online banking and advanced course
  • Reference project: development of a Java web application
  • Tools: Java 6, JSP, Servlets, JSF 1.2, EJB 3.0, Hibernate 3.0, JBoss 5.1, Eclipse 3.5, Oracle DB 10g, GlassFish, NetBeans, Tomcat
Apr 2008 - Nov 2009
1 year 8 months
Germany

Software development

Jouve-Germany GmbH

  • Development of production workflows to prepare typesetting production
  • Statistical analysis of data to determine a distribution function
  • Development of web applications and converters for XML document conversion
  • Further development and maintenance of existing web applications
  • Development and enhancement of frontend web components
  • Planning and development of TypoScript-based templates for typesetting of legal loose-leaf publications
  • IT integration (process standardization, solution integration) according to company standards
  • Tools: PHP, Perl, Shell, XML, XSLT, Linux, HTML, Eclipse

Summary

I am a software developer with many years of experience in designing and executing web-based IT projects in both the B2B and B2C sectors. Besides developing new systems and further enhancing existing ones, my work also included cost-benefit analysis of these systems and on-site consulting with clients. I have years of hands-on experience with enterprise Java technologies, relational databases (especially Oracle), and developing web applications on both Unix/Linux and Windows. My goal is to solve problems together and find the best solution for the client.

Skills

Programming Languages

  • Java
  • Javascript
  • Ruby (Chef Solo)
  • Bash Script (Docker)
  • Html

Databases

  • Microsoft Sql Server
  • Mysql
  • Oracle 11g
  • Neo4j
  • Elasticsearch
  • Cassandra

Operating Systems

  • Linux
  • Mac Os
  • Windows 7
  • Windows Server 2008

Tools

  • Springboot
  • React.js
  • Apache Tomcat
  • Jboss As
  • Apache Jackrabbit
  • Confluence
  • Jira
  • Intellij
  • Eclipse
  • Git
  • Svn
  • Maven
  • Jenkins
  • Selenium
  • Junit
  • Node.js
  • Profitbricks (Cloud)
  • Nginx
  • Hadoop.

Languages

French
Native
German
Advanced
English
Advanced

Education

University of Siegen

Diploma Engineer · Technical Informatics · Siegen, Germany

Certifications & licenses

Big Data

University of California, San Diego

Introduction to CQ5

Oracle DBMS Introduction and SQL

Linux/Unix

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