Waldemar Biller - Software Architect for Product Data

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Vellmar, Germany

Check rate

Experience

Jul 2024 - Present

2 years 3 months

Karlsruhe, Germany

Remote

Software-Architekt Produktdaten-Management Tool

Ferchau Contract GmbH

Definition of the software architecture
Design and development of modules
Supporting internal employees in the learning and onboarding process
Tools: SAP CAP / CDS, Java 21, SAP Hana, SAP Business Technology Platform (BTP)

Apr 2023 - Jun 2023

3 months

Solution Architect

top it-services AG

Coordinating collaboration between the workstreams Governance, network design, security, and operations and development tools
Creating an infrastructure concept
Creating the solution design
Tools: Kubernetes, Microsoft Word, StarUML

Oct 2022 - Mar 2023

6 months

Teamleiter Java-Entwicklung / DevOps

corporate connect GmbH

Coordinating development activities and facilitating planning meetings
Modernizing the application for mapping purchasing processes
Analyzing, optimizing, and consolidating existing CI pipelines
Supporting the creation and rollout of releases
Tools: Java 17, Spring Boot, ReactJS, Docker, Hibernate, JPA, GitHub, TravisCI

Jan 2022 - Present

4 years 9 months

IT-Consultant / DevOps Architect

ekom21 KGRZ Hessen

Consulting and support for software development
Setting up the development environment
Building and optimizing pipelines (GitLab CI)
Running workshops (Event Storming, User Story Mapping)
Tools: Kubernetes, Java 11, Java 17, GitLab, Confluence, Harbor, Git, Helm, FluxCD

Jan 2022 - Sep 2022

9 months

DevOps Engineer / Buildmanager

top it-services AG

Creating and coordinating releases
Coordinating test activities and error analysis
Optimizing CI/CD pipelines in Jenkins and GitLab
Tools: Kubernetes, Jenkins, GitLab, Gerrit, Git, Helm, FluxCD

Sep 2019 - Jan 2022

2 years 5 months

Head of Development / Head of Architecture

Betterspace GmbH

Team management (8 developers)
Responsibility for software architecture and cloud environment (DevOps)
Doubling the team size through talks, marketing activities, and involvement of external partners
Product Owner for the property management system gateway: designing an abstraction for integration with PMS and supporting implementation
Building a Kubernetes platform for operating and delivering log and metrics analysis
Tools: Java 11, NodeJS, PostgreSQL, Spring Integration, Azure Service Bus, AKS, Terraform, OpsGenie, Jira, Confluence, Git, Azure DevOps, Helm, FluxCD, Grafana, Grafana Loki, Prometheus, Kanban, Scrum

Feb 2019 - Aug 2019

7 months

Switzerland

Senior Software Architect / Site Reliability Engineer

Crisp Research AG

Advising customers on strategic and tactical approaches to introducing cloud technologies (cloud, Kubernetes, PaaS)
Publishing strategic articles on the website
Operating and further developing several Kubernetes clusters on behalf of customers (SRE/DevOps)
Tools: Azure Kubernetes Service, Terraform, OpsGenie, Jira, Confluence, Git, Bitbucket, Kanban, Load Balancing, Helm, FluxCD

Nov 2018 - Feb 2019

4 months

Software Developer

Amoria Bond GmbH

Development of components for the transport management system
Bug fixing
Tools: Java 10, Spring Boot, Oracle 12, Apache Kafka, Polymer, Bitbucket, Scrum

Aug 2018 - Oct 2018

3 months

Requirements Engineer

GBV Göttingen

Analysis of workshops for requirements gathering
Designing screens and prototypes with Figma
Creating a functional concept based on the results
Tools: StarUML, Figma, Confluence, Microsoft Office

Mar 2018 - Oct 2018

8 months

Requirements Engineer / Software Architect / Consultant

Your Mellon GmbH

Running user story mapping workshops
Processing and documenting workshop results in an implementation concept
Supporting the creation of a requirements specification
Tools: Figma, Microsoft Office

Jun 2017 - Feb 2018

9 months

Ops / Team Lead / Product Owner / Software Architect

fino create GmbH

Evaluation and setup of Kubernetes clusters on Open Telekom Cloud
Coordination of a team (3 employees) for developing a moving service
Gathering requirements and creating the software architecture
Tools: Kubernetes, Ansible, Confluence, Java 8, Spring Boot, RabbitMQ, Spring Data, MongoDB, IntelliJ, StarUML, Maven

Jan 2017 - Oct 2017

10 months

Team Lead Account Switching / Software Developer / Software Architect / Project Manager

fino create GmbH

Leading a team (10 employees) and coordinating external developers
Conducting expert interviews and coordinating further training
Developing a configuration server and an address database with OAuth2 authentication (Spring Security OAuth 2)
Tools: Java 8, Dropwizard, Spring Boot, RabbitMQ, Docker, JUnit, MongoDB, IntelliJ, StarUML, Elasticsearch, AWS, API, Gradle, Maven, GitLab, Jenkins, Kanban

Apr 2016 - Dec 2016

9 months

Software Architect

ekom21 KGRZ Hessen

Leading the development team (6 developers) and coordinating external developers
Creating the software architecture for a nationwide administrative offense procedure based on microservices and Domain-Driven Design
Implementing an event-driven architecture with event sourcing
Setting up a Kubernetes cluster with Ansible
Tools: Java 8, IntelliJ, Spring Boot, RabbitMQ, Domain-Driven Design, Event-Sourcing, Docker, JUnit, MongoDB, PostgreSQL, Kubernetes, Flyway, QueryDSL, REST, XML, Maven, Gerrit, Jenkins, Scrum

Sep 2015 - Jan 2016

5 months

Lead Software Developer / Software Architect

Deutsche Bahn Station & Service

Leading the development team (4 developers) for a back-office application in the project "Future Passenger Information"
Supporting the architecture team with tool and framework selection
Developing a microservices architecture with Spring Integration and RabbitMQ
Tools: Java 8, Spring Boot, HTML5, PostgreSQL, Spring Integration, RabbitMQ, Kubernetes, Elasticsearch, AWS, API, Eclipse, IntelliJ, Gradle, Scrum

Jan 2015 - Sep 2015

9 months

Lead Software Developer / Software Architect

GLS IT-Services GmbH

Leading the development team (4 developers) for a logistics portal for private customers
Designing the software architecture in coordination with stakeholders
Creating reports for project management
Tools: Java 7, Spring Web MVC, Spring Data, PostgreSQL, Spring Integration, JBoss EAP, Confluence, Flyway, JPA, Hibernate, IntelliJ, Gradle, Git, Subversion, Jenkins, Gerrit, Scrum

Jan 2014 - Nov 2014

11 months

Software Developer

Telekom Deutschland GmbH

Implementation of modules for provisioning user rights according to the functional concept
Creation of unit tests with JUnit
Integration of third-party systems
Tools: Java 7, Spring Integration, Spring Data, ActiveMQ, IBM WebSphereMQ, JPA, Hibernate, Maven, Eclipse, Subversion, Scrum

Oct 2013 - Dec 2013

3 months

Software Developer

Arvato Mobile Solutions

Development of modules according to the functional concept
Creation of unit tests with JUnit
Tools: Java 6, Oracle 10, Swing, JUnit, Eclipse, Ant

Mar 2013 - Sep 2013

7 months

Software Developer

Volkswagen AG

Analysis of a legacy system and modeling with UML
Design and implementation of the administration screen for mobile data capture
Documentation
Tools: Java 6, Spring Web MVC, Spring Data, Oracle, JUnit, Eclipse, Maven

Jan 2012 - Sep 2012

9 months

Project Manager

Volkswagen AG

Coordination with stakeholders for building a Confluence-based documentation platform
Identification of a suitable wiki structure and training of users
Tools: Confluence, Microsoft Office

Mar 2011 - Dec 2011

10 months

Software Developer

Volkswagen AG

Maintenance and further development of an administration solution for technical offices
Creation of a requirements specification to describe the functions
Tools: PHP, MySQL, Apache HTTP, Eclipse

Oct 2009 - Dec 2009

3 months

Software Developer

Volkswagen AG

Maintenance and further development of an administrative solution for technical offices
Preparation of a requirements specification to describe the functions
Tools: PHP, MySQL, Apache HTTP, Eclipse

Industry experience

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

Experienced in Information Technology, Government and Administration, Real Estate, Automotive, Transportation, and Banking and Finance.

Information Technology

Government and Administration

Real Estate

Automotive

Transportation

Banking and Finance

Business area experience

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

Experienced in Information Technology, Product Development, Operations, Project Management, Quality Assurance, and Strategy.

Information Technology

Product Development

Operations

Project Management

Quality Assurance

Strategy

Summary

I have built solutions and infrastructures across a wide range of technologies while leading teams and driving improvements in cloud, DevOps, and software architecture. I take pride in modernizing applications, creating robust CI/CD pipelines, and establishing scalable Kubernetes clusters that support development and operations.

My experience covers everything from designing microservices and event-driven architectures to hands-on development in Java and emerging frameworks. I enjoy solving complex challenges and consistently delivering reliable, efficient systems that meet evolving business needs.

Skills

Areas Of Work

Development Of Web-Based Applications With Spring
Quality Assurance
Project Management
Software Architecture And Software Architecture Consulting
Requirements Engineering
Strategic And Tactical Technology Consulting
Building And Operating Online Platforms

Industries

Logistics
Automotive
Telecommunications
Public Administration
Finance
Hospitality

Roles

Software Developer
Software Architect
Senior Software Developer
Project Manager
Requirements Engineer
Team Lead
Department Head

General Experience

It Experience Since 2009

Skills

Programming Languages: Java 8 / Java 11 / Java 17, Javascript / Ecmascript, Html5, Typescript, Css3, Sql
Databases: Postgresql, Mongodb, Mysql, Redis
Frameworks: Spring Boot, Spring Security, Spring Data, Spring Integration, Vue.Js, Nuxtjs, Tailwind Css, Reactjs
Testing: Junit, Spock Framework, Selenium, Vitest, Jest
Standards / Protocols: Jpa, Jax-Ws, Jax-Rs, Jdbc, Jms, Http, Soap, Rest
Tools: Rabbitmq, Activemq, Enterprise Architect, Staruml, Figma, Docker, Ansible, Confluence, Microsoft Office, Intellij
Build Tools: Maven, Gradle, Vite, Webpack
Version Control: Git, Gitlab, Azure Devops, Subversion (Svn), Gerrit, Bitbucket
Ci Systems: Jenkins, Gitlab Ci, Azure Pipelines
Application Servers / Servers: Tomcat, Undertow, Nginx
Operating Systems: Ubuntu, Mac Os X
Cloud Providers / Cloud Tools: Microsoft Azure, Amazon Aws, Google Cloud, Kubernetes, Helm, Prometheus, Grafana, Grafana Loki, Terraform
Concepts: Enterprise Application Integration, Enterprise Integration Patterns, O/R Mapping, Object-Oriented Programming, Uml, Rest, Soap, Continuous Integration, Continuous Delivery, Continuous Deployment, Lean Architecture, Clean Architecture (Hexagonal), Domain-Driven Design, Microservices, Service-Oriented Architecture (Soa), Design Patterns, Cqrs, Event-Sourcing, Event-Driven Architecture (Eda), Oauth 2
Methods: Lean Startup, Scrum, Kanban, Xtreme Programming, User Story Mapping, Event Storming
Issue Tracker: Jira, Gitlab Issues

Languages

German

Native

English

Advanced

Russian

Elementary

Statistics

Experience

Total positions 21

Experience in Information Technology 10.5 y

Avg length 10 m

Longest experience 4 y 8 m

Global experience

Countries worked in 2 (Germany, Switzerland)

Primary country Germany

Expertise

Recent roles Software-Architekt Produktdaten-Management Tool, Solution Architect, Teamleiter Java-Entwicklung / DevOps

Main industries Information Technology, Government and Administration, Real Estate

Main business areas Information Technology, Product Development, Operations

Profile

Member since

March 2024

Last update

August 2026

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Frequently asked questions

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

Waldemar speaks the following languages: German (Native), English (Advanced), Russian (Elementary).

Waldemar has at least 15 years of experience. During this time, Waldemar has worked in at least 15 different roles and for 15 different companies. The average length of individual experience is 1 year and 8 months. Note that Waldemar may not have shared all experience and actually has more experience.

Based on recent experience, Waldemar would be well-suited for roles such as: Software-Architekt Produktdaten-Management Tool, Solution Architect, Teamleiter Java-Entwicklung / DevOps.

Waldemar's most recent position is Software-Architekt Produktdaten-Management Tool at Ferchau Contract GmbH.

In recent years, Waldemar has worked for Ferchau Contract GmbH, top it-services AG, corporate connect GmbH, ekom21 KGRZ Hessen, and Betterspace GmbH.

Waldemar is most experienced in industries like Information Technology, Government and Administration, and Real Estate. Waldemar also has some experience in Automotive, Transportation, and Telecommunication.

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

Waldemar has recently worked in industries like Information Technology, Government and Administration, and Real Estate.

Waldemar has recently worked in business areas like Information Technology, Product Development, and Operations.

Waldemar will be available full-time from November 2026.

Daily rate distribution

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Average rates for similar positions

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Daily rate avg. 955 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

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Median rate 940 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.