Waldemar Biller - Solution Architect

Q: Where is Waldemar based?

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

Q: What languages does Waldemar speak?

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

Q: How many years of experience does Waldemar have?

Waldemar has at least 14 years of experience. During this time, Waldemar has worked in at least 14 different roles and for 14 different companies . The average length of individual experience is 1 year and 9 months . Note that Waldemar may not have shared all experience and actually has more experience.

Q: What is Waldemar's latest experience?

Waldemar's most recent position is Solution Architect at top it-services AG .

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

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

Q: Which industries is Waldemar most experienced in?

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

Q: Which business areas is Waldemar most experienced in?

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

Q: Which industries has Waldemar worked in recently?

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

Q: Which business areas has Waldemar worked in recently?

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

Recommended expert

Vellmar, Germany

Experience

Apr 2023 - Jun 2023

3 months

Solution Architect

top it-services AG

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

Oct 2022 - Mar 2023

6 months

Team Lead Java Development / DevOps

corporate connect GmbH

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

Jan 2022 - Present

4 years 2 months

IT Consultant / DevOps Architect

ekom21 KGRZ Hessen

Advising and supporting software development
Setting up the development environment
Setting up and optimizing pipelines (GitLab CI)
Conducting 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 / Build Manager

top it-services AG

Preparing and coordinating releases
Coordinating testing 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

Managing a team (8 developers)
Responsible for software architecture and cloud environment (DevOps)
Doubled team size through presentations, marketing activities and involving external partners
Product Owner for Property Management System Gateway: designed an abstraction for PMS integration and supported the implementation
Built 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 clients on strategic and tactical approaches for introducing cloud technologies (Cloud, Kubernetes, PaaS)
Publishing strategic articles on the website
Operating and further developing multiple Kubernetes clusters on behalf of clients (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

Developing components of 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

Analyzing workshops to gather requirements
Designing screens and prototypes with Figma
Creating a functional specification based on the outcomes
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 plan
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

Evaluating and deploying Kubernetes clusters on Open Telekom Cloud
Leading a team (3 members) to develop a migration 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 for Account Switching / Software Developer / Software Architect / Project Manager

fino create GmbH

Leading a team (10 members) and managing external developers
Conducting technical interviews and coordinating 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 managing external developers
Designing the software architecture for a nationwide administrative offenses system 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 the back-office application in the "Travel Information of the Future" project
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 the logistics portal for private customers
Designing the software architecture in coordination with stakeholders
Preparing 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

Implementing modules for provisioning user rights according to the specifications
Writing unit tests with JUnit
Integrating 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 requirements specification
Writing 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 interface 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 to set up a Confluence-based documentation platform
Defining a suitable wiki structure and training users
Tools: Confluence, Microsoft Office

Mar 2011 - Dec 2011

10 months

Software Developer

Volkswagen AG

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

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (10 years), Government and Administration (5 years), Real Estate (2.5 years), Automotive (2 years), Transportation (1.5 years), and Banking and Finance (1 year).

Information Technology

Government and Administration

Real Estate

Automotive

Transportation

Banking and Finance

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (13 years), Product Development (6 years), Operations (3 years), Project Management (2.5 years), Quality Assurance (1 year), and Strategy (0.5 years).

Information Technology

Product Development

Operations

Project Management

Quality Assurance

Strategy

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
Setup And Operation Of Online Platforms

Industries

Logistics
Automotive
Telecommunications
Public Administration
Finance
Hospitality

Roles

Software Developer
Software Architect
Lead 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, Extreme Programming, User Story Mapping, Event Storming
Issue Trackers: Jira, Gitlab Issues

Languages

German

Native

English

Advanced

Russian

Elementary

Profile

Created

March 2024

Last Update

March 2025

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Frequently asked questions

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

Where is Waldemar based?

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

What languages does Waldemar speak?

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

How many years of experience does Waldemar have?

Waldemar has at least 14 years of experience. During this time, Waldemar has worked in at least 14 different roles and for 14 different companies. The average length of individual experience is 1 year and 9 months. Note that Waldemar may not have shared all experience and actually has more experience.

What roles would Waldemar be best suited for?

Based on recent experience, Waldemar would be well-suited for roles such as: Solution Architect, Team Lead Java Development / DevOps, IT Consultant / DevOps Architect.

What is Waldemar's latest experience?

Waldemar's most recent position is Solution Architect at top it-services AG.

What companies has Waldemar worked for in recent years?

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

Which industries is Waldemar most experienced in?

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

Which business areas is Waldemar most experienced in?

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

Which industries has Waldemar worked in recently?

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

Which business areas has Waldemar worked in recently?

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

What is the availability of Waldemar?

Waldemar is immediately available full-time for suitable projects.

What is the rate of Waldemar?

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