Orhan K.
Backend Developer
Experience
Aug 2022 - Sep 2024
2 years 2 monthsBackend Developer
kv.digital gmbh
- Backend development work for appointment and doctor services, including implementing various requirements for managing doctor appointments.
- SCRUM / Kanban
- Java 21, IntelliJ IDEA, Spring Boot (MVC, Data JPA, …)
- GIT, Confluence, JIRA
- Maven, CI: Jenkins, Docker - ActiveMQ
- MariaDB, Solr, Liquibase
- Testcontainers, JUnit5, Mockito
May 2022 - Aug 2022
4 monthsSoftware Developer and Technical Consultant
Brenntag
- Development work and technical consulting on software for formula and order processing.
- Additionally, technical consulting and implementation of price processing software for chemical substances.
- Java 11, IntelliJ IDEA, Spring Boot (MVC, Data JPA, …)
- GIT, Maven
- Solr, Vaadin
- MsSQL
- Docker, Azure DevOps
Oct 2021 - Feb 2022
5 monthsPrivate Project
- Private app development with Jetpack Compose to learn the Kotlin programming language.
Feb 2021 - Sep 2021
8 monthsBackend Developer
kv.digital gmbh
- Development of the vaccination appointment service for kv.digital GmbH.
- Responsible for the backend development of the vaccination appointment service, including implementing vaccination guidelines and managing vaccination appointments for doctors.
- SCRUM / Kanban
- Java 11, IntelliJ IDEA, Spring Boot (MVC, Data JPA, …)
- GIT, Confluence, JIRA
- Maven, CI: Jenkins, Docker
- MariaDB, Solr, Liquibase
- JUnit5, Mockito
Nov 2018 - Oct 2020
2 yearsLead and Solo Development of a Mobile Game
- Independent development and project management, including coordinating freelancers to source assets (graphics, sound, music, marketing).
- Use of the hybrid game framework LibGDX for cross-platform development.
- Successful launch of the application on the Google Play Store and iOS App Store in November 2020.
Mar 2018 - Oct 2018
8 monthsBackend Developer
Vaillant group
- Development and implementation of microservices to manage and control remotely operated heating systems.
- Conducting data analysis of specific events such as failures, malfunctions and power consumption.
- SCRUM
- Java 8, IntelliJ Idea, SpringBoot, Microservices
- GIT, JIRA
- Maven, CI: Jenkins, Docker
- MariaDB, Kafka
- JUnit5, Mockito
Mar 2017 - Aug 2017
6 monthsBackend Developer
Bayer
- Responsible for the development and implementation of backend microservices to control remotely operated heating systems.
- Analysis and evaluation of specific events such as failures, malfunctions and power consumption to optimize system performance.
- SCRUM
- Angular 2, HTML 5, CSS
- Java 8, IntelliJ Idea, SpringBoot
- GIT
- Maven, CI: Jenkins
- MongoDB, Solr
- JUnit5, Mockito
Feb 2016 - Dec 2016
11 monthsDeveloper
Thyssen Krupp Steel
- Development of a component for the manufacturing execution system in the warehouse management area.
- SCRUM
- Java 8,Eclipse, Hibernate
- GIT
- Maven, CI: Jenkins
- Oracle
Other Projects
- Long-term projects at various companies like Vodafone D2, Kyocera Mita, …
Summary
I have been a passionate Java developer for over 24 years and have gained valuable experience in numerous projects. Since 2010, I have been working as a freelance Java software developer with a clear focus on backend development, especially with Spring Boot.
Languages
German
NativeEnglish
AdvancedTurkish
AdvancedEducation
Fachhochschule Dortmund
Diploma in Computer Science (FH) · Computer Science · Dortmund, Germany
Certifications & licenses
PMI – PMP Certified
PMI
Project Management Professional
SCJP Sun Certified Java Programmer
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