Rolf Mainka - Lead Developer and Tester of Domain Applications for the Zensus2021 Project

Q: Where is Rolf based?

Rolf is based in Lollar, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Rolf speak?

Rolf speaks the following languages: German (Advanced), English (Advanced), Persian (Advanced), French (Advanced) .

Q: How many years of experience does Rolf have?

Rolf has at least 30 years of experience. During this time, Rolf has worked in at least 13 different roles and for 6 different companies . The average length of individual experience is 2 years and 4 months . Note that Rolf may not have shared all experience and actually has more experience.

Q: What is Rolf's latest experience?

Rolf's most recent position is Lead Developer and Tester of Domain Applications for the Zensus2021 Project at Federal Statistical Office .

Q: What companies has Rolf worked for in recent years?

In recent years, Rolf has worked for Federal Statistical Office .

Q: Which industries is Rolf most experienced in?

Rolf is most experienced in industries like Banking and Finance , Government and Administration , and Insurance .

Q: Which business areas is Rolf most experienced in?

Rolf is most experienced in business areas like Information Technology , Quality Assurance , and Operations . Rolf also has some experience in Project Management , Product Development , and Accounting .

Q: Which industries has Rolf worked in recently?

Rolf has recently worked in industries like Government and Administration .

Q: Which business areas has Rolf worked in recently?

Rolf has recently worked in business areas like Information Technology , Operations , and Quality Assurance .

Recommended expert

Lollar, Germany

Experience

Mar 2019 - Present

7 years 1 month

Germany

Lead Developer and Tester of Domain Applications for the Zensus2021 Project

Federal Statistical Office

Kubernetes, AWS cloud, Docker, RESTful services, ActiveMQ, Oracle Advanced Queuing, JBoss EAP, Spring Batch, Git, Keycloak, Kafka, Maven
Setup of CD/CI pipelines with Jenkins
Development of automated integration tests
Performing DevOps tasks
Regular development-accompanying execution of static code analyses on all releases of the Zensus domain applications with SonarQube
Setup of an R server for household generation
Setup of a Kafka server for the CVTS application
Setup of a Keycloak instance
Setup of a Jira instance for the Jira migration
Setup of an IRI Workbench instance and Cosort for test data creation
Setup of test systems for Java web applications with JBoss 8, JDK 17, and Oracle as well as MySQL databases
Setup of the corresponding Oracle databases including meaningful domain data
Identifying vulnerabilities in the technical communication between the domain applications
Building extensive domain-specific and technical know-how for all Zensus domain applications
Supporting and advising the specialist departments on the Zensus business processes in pre-production and production
Conducting load and performance tests with JMeter and bash scripting

Sep 2012 - Feb 2019

6 years 6 months

Master Data System

Major Bank Frankfurt

Architecture, design, and implementation of a Java-based master data system for corporate clients of the major bank
Development of an online GUI, a batch component (Spring Batch), and RESTful services (Jersey)
Sole responsibility for the concept, design, and development of a bank-wide unique Java-based business event message broker
Implementation of over 130 business events to serve other banking systems (tax, online banking, MiFID, CRM, ISIS, eIntegrator, GPM)
Development of the GPM – GlobalParty Manager based on Java and Angular.js
Development of Java-based RESTful services for maintaining domain models in the master data system
Sole development of the REWORKER component for delayed delivery of business events
Data warehouse extraction: compiling information on parties and party clusters via database views for Informatica
Technology stacks: FRAME, RichFaces, PrimeFaces, MQ, WebSphere MQ, Spring, Spring Batch, Spring Data, Spring Integration, Spring JMS, Angular.js, Java 7/Java 8, JAXB, JEE, JUnit, Liberty, RESTful services, SOAPUI, Oracle 12, Maven, Bamboo, Git, TFS, Wicket, Web services, WorkManager, XML, XSD

Apr 2011 - Aug 2012

1 year 5 months

Further development of the bank-wide intranet application for creating banking transactions

ING DIBA

Further development of the bank-wide intranet application for creating banking transactions
Use of Apache Wicket as the framework
Technologies: Apache Wicket, Oracle 11, Maven, Java 7, JavaScript, Jenkins, Jira

Apr 2008 - Mar 2011

3 years

Technical project lead for an intranet application for automated balance sheet analysis

Major Bank Frankfurt

Architecture, design, and implementation of an intranet application for automated balance sheet analysis and reporting
Designing and coordinating an offshore team regarding design guidelines
Acting in a QA role and communicating with the client
Technologies and tools: Spring, Spring Webflow, JSF, RichFaces, Web services (JAX-RPC, JAX-WS), JAXB, Java 6, Oracle, WebSphere Application Server, JUnit, EasyMock, Maven 2.1.0, Enterprise Architect, ClearQuest, RAD, TestDirector

Oct 2007 - Mar 2008

6 months

Design and implementation of a data warehouse

Dekabank

Development of a reporting application for accounting and risk controlling
System components based on SQL Server 2005 (SSIS, SSAS)
Front-end development for data maintenance and display with C# and SQL Server 2005
Technologies and tools: C#, .NET 2.0, SQL Server 2005, SSIS

Feb 2007 - Sep 2007

8 months

Design and implementation of a J2EE-based service provider for invoking Cobol host services

Major Bank Frankfurt

Development of a J2EE-based infrastructure for communication between Java applications and Cobol mainframe programs
Maintenance of the infrastructure and running services
Coordination of several Cobol developers
Technologies and tools: Java, Eclipse, JUnit, Hibernate, Enterprise Architect, Ant, RMI, Axis, WebSphere Application Server, XSLT

Jan 2004 - Jan 2007

3 years 1 month

Implementation of the technical architecture for rating systems

Major Bank Frankfurt

Implementation of a Java/J2EE-based platform for Basel II rating procedures
Evaluation of rule engines (BlazeAdvisor, JRules) and optimization of the JRules integration
Maintenance of the XML-based part of the platform
Implementation of tasks in the environment of Oracle and Hibernate
Technologies and tools: JRules, BlazeAdvisor, Java, J2Ims, Eclipse, JUnit, Enterprise Architect, Ant, RMI, Axis, Hibernate, WebSphere Application Server, XML, XSLT

Apr 2003 - Dec 2003

9 months

Further development of the products GPM, Pre-Approval and IW

Major Bank Frankfurt

Further development of the Java products GPM (Global Position Master), Pre-Approval and IW (International Watchlist)
Deputy project lead
Setup of the Java development and test environment
Coordination of features with the client, implementation and acceptance
Technologies: Java, Swing, Oracle, WSAD, ClearCase

Jan 2003 - Mar 2003

3 months

Coordination and production rollout of the Logistics Support System

Major Bank Frankfurt

Integration of the LBS off-the-shelf software within Commerzbank as part of the JAA outsourcing project
Coordination of the provisioning of application and database servers
Integration of authentication and authorization mechanisms
Creation of deployment instructions and an operations concept
Product ownership for follow-up releases and integration of read-only access to third-party systems via J2Ims
Technologies and tools: J2Ims, WebSphere Application Server, WSAD

Jan 2002 - Dec 2002

1 year

Design and implementation of an IT-driven order management and billing toolset

Major Bank Frankfurt

Development of an IT-driven order management and billing toolset for Commerzbank's central staff of Head Office and Branch Organization
Data modeling and creation of a logical data model
Setup and maintenance of the Oracle database and implementation of the data access layer
Development of a data import interface and coordination of data migration with IT production
Performance optimization using PL/SQL scripts
Technologies and tools: Oracle, PL-SQL, WebSphere Application Server, WSAD, SQL-Navigator

Jan 2001 - Dec 2001

1 year

Building a billing system for the use of digital certificates

Major Bank Frankfurt

Developed a testing tool for the Transaction Coordinator in the ComTrust/IDENTRUS project
Applied Java-based techniques such as OCSP and digital signatures on XML documents
Technologies and tools: OCSP, RSA algorithm, XML, digital signature

Oct 1999 - Dec 2000

1 year 3 months

Integration of the commercial software Rational ClearQuest into Commerzbank

Commerzbank AG

Got up to speed with Rational ClearQuest and integrated it into Commerzbank's infrastructure
Created and implemented a deployment concept
Acted as product manager and developed project-specific workflows
Technologies and tools: Rational ClearQuest, UML

Apr 1996 - Oct 1999

3 years 7 months

Further development of the calculation system for life and health insurance

DBV-Winterthur AG

Developed a testing system for quality assurance of DBV-Winterthur's calculation system in Delta
Introduced multiple tariffs, including the ÖTV pension
Developed the BAV system for reporting BAV values to the Federal Insurance Supervisory Office
Technologies and tools: Delta, actuarial mathematics, IPF, OS-1100

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Banking and Finance, Government and Administration, and Insurance.

Banking and Finance

Government and Administration

Insurance

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Quality Assurance, Operations, Project Management, Accounting, and Business Intelligence.

Information Technology

Quality Assurance

Operations

Project Management

Accounting

Business Intelligence

Skills

It Focus Areas:

Analysis, Design, Architecture, Conceptualization, And Development
Testing
Technical Project Management
Coordination Of Developer Teams

Industries:

Research And Academia
Insurance
Banks
Federal Statistical Office

Programming Languages:

Java
Javascript
C
Pascal
C#

Databases:

Oracle 21
Mysql

Products / Tools:

Kubernetes 1.30
Aws Cloud
Angular 17
Angular.js
Ant
Axis
Bamboo
Blazeadvisor (Rule Engine)
Eclipse
Enterprise Architect
Docker
Git
Hibernate
J2ee
Java 17
Jboss
Jira
Jdbc
Jenkins
Jmeter
Jms
Jrules (Rule Engine)
Jsf
Jsp
Junit
Keycloak
Kafka
Maven
Mq
Node.js
Puppet
Rational Rose
React Js
Rest (Jersey)
Rmi
Rserve
Spring
Spring Webflow
Richfaces
Struts
Sonarqube
Swing
Tomcat
Websphere Application Server
Websphere Mq
Web Services
Apache Wicket

Languages

German

Advanced

English

Advanced

Persian

Advanced

French

Advanced

Education

Diploma in Mathematics / Computer Science · Mathematics / Computer Science

Statistics

Experience

Total positions 13

Experience in Banking and Finance 19.5 y

Avg length 2 y 3 m

Longest experience 7 y

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Lead Developer and Tester of Domain Applications for the Zensus2021 Project, Master Data System, Further development of the bank-wide intranet application for creating banking transactions

Main industries Banking and Finance, Government and Administration, Insurance

Main business areas Information Technology, Quality Assurance, Operations

Qualifications

Highest degree Master

Profile

Created

September 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Rolf based?

Rolf is based in Lollar, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Rolf speak?

Rolf speaks the following languages: German (Advanced), English (Advanced), Persian (Advanced), French (Advanced).

How many years of experience does Rolf have?

Rolf has at least 30 years of experience. During this time, Rolf has worked in at least 13 different roles and for 6 different companies. The average length of individual experience is 2 years and 4 months. Note that Rolf may not have shared all experience and actually has more experience.

What roles would Rolf be best suited for?

Based on recent experience, Rolf would be well-suited for roles such as: Lead Developer and Tester of Domain Applications for the Zensus2021 Project, Master Data System, Further development of the bank-wide intranet application for creating banking transactions.

What is Rolf's latest experience?

Rolf's most recent position is Lead Developer and Tester of Domain Applications for the Zensus2021 Project at Federal Statistical Office.

What companies has Rolf worked for in recent years?

In recent years, Rolf has worked for Federal Statistical Office.

Which industries is Rolf most experienced in?

Rolf is most experienced in industries like Banking and Finance, Government and Administration, and Insurance.

Which business areas is Rolf most experienced in?

Rolf is most experienced in business areas like Information Technology, Quality Assurance, and Operations. Rolf also has some experience in Project Management, Product Development, and Accounting.

Which industries has Rolf worked in recently?

Rolf has recently worked in industries like Government and Administration.

Which business areas has Rolf worked in recently?

Rolf has recently worked in business areas like Information Technology, Operations, and Quality Assurance.

What is Rolf's education?

Rolf holds a Master in Mathematics / Computer Science.

What is the availability of Rolf?

Rolf is immediately available full-time for suitable projects.

What is the rate of Rolf?

Rolf's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.