Timo R.
Expert Software Developer
Experience
Jan 2023 - Feb 2024
1 year 2 monthsBornheim, Germany
Expert Software Developer
HORNBACH Baumarkt AG
- Industry: Retail
- Software for checkout process in web shop
- Maintenance and further development of existing software
- Planning and implementation of new features in existing software
- Support of existing software operations in the cloud
- Java SE, Spring Boot, IntelliJ IDEA
- Google Cloud, Kubernetes, Docker, Apache Kafka
May 2022 - Jun 2022
2 monthsBraunschweig, Germany
IT Trainer
BREDEX GmbH
- Client: BREDEX GmbH / Volkswagen AG
- Industry: Services
- Training on Docker and microservices
- Creation of training materials
- Design of small exercises
- Design of larger, project-like exercises
- Proper preparation of training content
- Delivery of given training content
- Moderation of individual/group activities
- Organization and supervision of individual/group work
- Preparation and delivery of small group or one-on-one trainings
- Proper follow-up including correction of exercises
- Java SE, Spring Boot, Docker, IntelliJ IDEA
Apr 2022 - Dec 2022
9 monthsBerlin, Germany
Expert Software Developer
GROPYUS Technologies GmbH
- Industry: Construction
- Rule-based parameterization of 3D models
- Design and implementation of a new microservice
- Implementation of parameterization based on a rules engine
- Deployment of the new microservice in Microsoft Azure
- Documentation of design and implementation
- Java SE, Kotlin, Spring Boot, IntelliJ IDEA
- JBoss Drools, JBoss OptaPlanner, Microsoft Azure, Kubernetes, Docker
Jan 2022 - Mar 2023
1 year 3 monthsOsnabrück, Germany
Consultant
Hellmann Worldwide Logistics SE & Co. KG
- Industry: Logistics
- Consulting/mentoring in software architecture & agile project management
- Analysis of existing software architecture
- Analysis of agile project management practices
- Advice on improving software architecture
- Advice on agile project management practices
- Atlassian JIRA and Confluence, Miro, Microsoft Teams
Jul 2021 - Mar 2022
9 monthsIngolstadt, Germany
Expert Software Developer
Media-Saturn IT Services GmbH
- Industry: Retail
- Software for availability, delivery promise, and sourcing
- Maintenance and further development of existing software
- Planning and implementation of new features in existing software
- Support of existing software operations in Google Cloud
- Development of an architectural vision for a partial rewrite
- Java SE, Kotlin, Spring Boot, IntelliJ IDEA
- Google Cloud, Kubernetes, Docker, Apache Kafka, PostgreSQL, MongoDB
May 2021 - Dec 2021
8 monthsOsnabrück, Germany
DevOps Consultant
Hellmann Worldwide Logistics SE & Co. KG
- Industry: Logistics
- CI/CD system for integration platform between external logistics systems
- Analysis of existing infrastructure regarding CI/CD
- Analysis of requirements for a new CI/CD system
- Development of a rough concept for a new CI/CD system
- Planning and organizational support for CI/CD system rollout
- Kubernetes (on-prem), Docker
- Atlassian JIRA and Confluence, Miro, Microsoft Teams
Jan 2021 - Jul 2021
7 monthsIngolstadt, Germany
Expert Software Developer
Media-Saturn IT Services GmbH
- Industry: Retail
- Integration platform between two ERP systems based on microservices
- Design and implementation of interfaces
- Implementation of event-based processing using Kafka
- Implementation of robust error handling
- Deployment of microservices in Google Cloud
- Documentation of design and implementation
- Java SE, Kotlin, IntelliJ IDEA
- Google Cloud, Kubernetes, Docker, Apache Kafka, MongoDB
- Koin, Arrow-Kt, Http4k, Jackson, Testcontainers
Mar 2020 - Jan 2021
11 monthsFrankfurt, Germany
Expert Software Developer
compeople AG
- Client: Deutsche Vermögensberatung AG
- Industry: Financial services
- Code generator for creating microservices from a DSL
- Design and documentation of the code generator architecture
- Design and documentation of a domain-specific language (DSL)
- Implementation of the code generator using Apache Freemarker
- Consulting and support for using the developer tool
- Java SE, Kotlin, IntelliJ IDEA, Spring Boot, Apache Freemarker
- Apache Maven (including custom plugins), Jenkins
- Kubernetes, Docker, Microsoft Azure
Apr 2019 - Feb 2020
11 monthsFrankfurt, Germany
Expert Software Developer
compeople AG
- Client: Deutsche Vermögensberatung AG
- Industry: Financial services
- New backend with REST-based API for the entire IT system
- Design and documentation of a new backend architecture
- Design and documentation of public interfaces of the new backend
- Implementation of microservices using Spring Boot
- Consulting on software architecture and agile approach
- Java SE, Kotlin, IntelliJ IDEA, Spring Boot, Oracle, PostgreSQL
- Apache Maven (including custom plugins), Jenkins
- Kubernetes, Docker, Microsoft Azure
Mar 2018 - Mar 2019
1 year 1 monthFrankfurt, Germany
Senior Software Developer
compeople AG
- Client: Deutsche Verrechnungsstelle GmbH
- Industry: Financial services
- New development and enhancement of backend microservices
- Maintenance and further development of existing Spring Boot microservices
- Design and development of new Spring Boot microservices
- Requirements analysis considering the existing solution
- Interim support for the product owner
- Java SE, Kotlin, Eclipse IDE, IntelliJ IDEA, Spring Boot, MongoDB
- Partly Kafka, Apache Maven, Jenkins, Kubernetes, Docker
Mar 2017 - Feb 2018
1 yearFrankfurt, Germany
Senior Software Developer
compeople AG
- Client: R+V Versicherungen / Deutsche Vermögensberatung AG
- Industry: Financial services
- Maintenance and further development of existing UI frameworks & build system
- Maintenance of existing UI frameworks
- Support for external application developers (framework users)
- Bug analysis and resolution
- Setup and maintenance of a new build system
- Requirements analysis considering the existing solution
- Design and implementation of a new solution
- Coordination of new solution rollout with users
- Preparation and support for new technologies and tools introduction
- Training colleagues on used technologies and tools
- Java SE, Groovy, Eclipse IDE
- OSGi, Eclipse Equinox, Eclipse RCP, Eclipse Riena, Hivemind
- Apache Maven, Eclipse Tycho, Jenkins
Oct 2014 - Feb 2017
2 years 5 monthsMannheim, Germany
Senior Software Architect and Developer (partially technical lead)
vitasystems GmbH
- Industry: Telemedicine
- Backend for a new telemedicine platform
- Requirements analysis in collaboration with product management
- Design of a component-oriented 3-tier architecture
- Presentation/discussion of architecture design
- Research and selection of appropriate technologies
- Effort estimation and implementation planning
- Preparation and support for new technologies and tools introduction
- Training colleagues on used technologies and tools
- System implementation
- Verification of implementation through automated tests
- Setup and maintenance of build infrastructure
- Creation of compliant documentation according to ISO 13485
- Java SE, Eclipse IDE
- OSGi, Eclipse Equinox, Eclipse EMF, Eclipse Xtend
- Eclipse Jetty, JAX-RS & Jersey, REST-assured
- Apache Maven, Eclipse Tycho, Jenkins, Apache JMeter
- Eclipse Teneo, Hibernate, PostgreSQL
Sep 2014 - Oct 2014
2 monthsMannheim, Germany
Acting Product Owner
vitasystems GmbH
- Industry: Telemedicine
- New system for receiving vital sign data
- Support for Scrum adoption and usage
- Maintenance of product backlog
- Facilitation of key Scrum ceremonies (e.g., sprint planning, sprint review)
- Atlassian JIRA, Atlassian Confluence
Apr 2014 - Jul 2014
4 monthsMannheim, Germany
Software Architect and Developer
vitasystems GmbH
- Industry: Telemedicine
- New communication protocol for transmitting vital sign data
- Requirements analysis for new HTTP-based communication protocol
- Development and specification of HTTP-based communication protocol
- Creation of compliant documentation (ISO 13485) for the protocol
- HTTP, REST
Feb 2014 - Aug 2014
7 monthsMannheim, Germany
Software Architect and Developer
vitasystems GmbH
- Industry: Telemedicine
- Maintenance and further development of the vital sign data receiving system
- Requirements analysis in collaboration with product management
- Effort estimation and implementation planning
- Implementation of new features and bug fixes
- Creation of compliant documentation according to ISO 13485
- Verification of implementation through manual tests
- Java SE, Eclipse IDE, Eclipse RCP
- Apache Struts, Apache Tomcat, Apache HTTPd, JBoss RESTEasy
- Hibernate, PostgreSQL, Apache Ant, Jenkins
Jul 2013 - Nov 2013
5 monthsKarlsruhe, Germany
Software Architect and Developer
init AG / initplan GmbH
- Industry: Public transport
- Specification, design, and implementation of a REST API
- Requirements analysis with software development colleagues
- API specification based on gathered requirements
- Research and selection of appropriate technologies and tools
- Architecture design and API definition
- Implementation of API components
- Java SE
- SOAP & web services, Apache HTTPd, Apache Tomcat
- Apache Maven, SparxSystems Enterprise Architect
Jun 2013 - Nov 2013
6 monthsKarlsruhe, Germany
Software Architect and Developer
init AG / initplan GmbH
- Industry: Public transport
- Revision and improvement of a CI/build system
- Identification of weaknesses in existing CI/build system
- Requirements analysis with software development colleagues
- Research and selection of appropriate technologies and tools
- Setup and deployment of a central build server
- Development of processes for release planning and creation
- Apache Maven, Apache Ant, Eclipse Tycho
- Jenkins, JFrog Artifactory, Sonatype Nexus
Apr 2013 - Jul 2013
4 monthsKarlsruhe, Germany
Software Architect and Developer
init AG / initplan GmbH
- Industry: Public transport
- Development of a web app as a client for existing backend
- Requirements analysis for web client with support/sales teams
- Research and selection of appropriate technologies and tools
- Architecture design of web client and interface to legacy system
- Implementation of web client
- Java SE, Eclipse IDE
- Java Servlets, JavaScript, jQuery & jQuery Mobile
- Eclipse Jetty, Apache HTTPd, Apache Tomcat
Nov 2010 - Mar 2013
2 years 5 monthsKarlsruhe, Germany
Software Architect and Developer (partially technical lead)
init AG / initplan GmbH
- Industry: Public transport
- Reimplementation of existing timetable creation software system
- Identification and assessment of weaknesses in existing system
- Requirements analysis for new version with support/sales teams
- Design of a 3-tier architecture applying established patterns
- Presentation and discussion of architecture design
- Effort estimation and implementation planning
- System implementation leading a team of three developers
- Design and implementation of build infrastructure with Maven/Tycho
- Java SE, Eclipse IDE
- Eclipse RCP/RAP, Eclipse SWT, Eclipse Jetty
- Apache Maven, Eclipse Tycho, Jenkins
- Versant Object Database, SparxSystems Enterprise Architect
Nov 2006 - Jul 2007
9 monthsFlorianópolis, Brazil
Software Developer (Intern)
Módula Software Ltda.
- Industry: Retail
- Maintenance and further development of existing retail software systems
- Bug fixes in existing system
- Implementation of new features across all system layers
- Requirements analysis for a project management tool
- Architecture design for this tool based on main system architecture
- Implementation of the tool using existing libraries
- Maintenance and enhancement of Ant-based build system
- Borland Delphi
- DAnt (Delphi Ant variant)
- PostgreSQL
Summary
Devoted advocate of the Clean Code and Software Craftsmanship movement. Focus areas include backend systems with event-driven architecture based on microservices implemented in Java and Kotlin, as well as component-oriented and model-driven software development with Eclipse Equinox (OSGi) and EMF. Also extensive experience in build management, continuous integration, and release management.
Languages
German
NativeEnglish
AdvancedSpanish
AdvancedPortuguese
ElementaryEducation
Oct 2003 - Jun 2010
Karlsruhe Institute of Technology
Diploma in Computer Science · Computer Science · Germany · 1.3
Certifications & licenses
iSAQB Certified Professional for Software Architecture (Foundation Level)
iSAQB
Medical Device Consultant Certification under §31 MPG
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