Apache Tomcat Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used Apache Tomcat
Stefan Marx
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Thomas Pawlitzki
Last position:
Freelance Software Architect at Self-employed
Christian Hunkirchen
Last position:
Developer at Opereon Consulting GmbH
- Developed a shop website
- Integrated an AI language model
- Developed tools for AI-powered webhooks
- Technical tools: REACT.js; Elevenlabs; MCP; n8n; HTTP
Andreas Ernst
Last position:
Consultant at Iteratec GmbH
René Karges
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
Alexander Vasiliev
Last position:
Senior DevOps / Platform Engineer at Kaufland e-commerce / real.digital (ex hitmeister.de)
- Evolved the platform from bare-metal infrastructure with a monolithic PHP application to a hybrid Google Cloud architecture with Go microservices on Kubernetes
- Managed and scaled a production infrastructure with 300+ VMs and dozens of clusters, including MySQL, PostgreSQL, MongoDB, RabbitMQ, Redis and Elasticsearch clusters
- Designed architecture, deployment, monitoring, performance analysis, and upgrades for all platform services using Terraform and Ansible
- Migrated observability systems from ELK and Prometheus to Datadog, managed with Terraform
- Introduced Jenkins CI/CD with SonarQube integration and automated tests to speed up feedback cycles
- Containerized the testing environment and implemented GitLab CI pipelines for Docker image builds, static code analysis, and infrastructure tests
- Performed zero-downtime migrations of MySQL and MongoDB clusters to Google Cloud
- Developed reusable Ansible roles for database clusters and automated data obfuscation for staging environments
- Decomposed monolithic databases and migrated to microservice architectures
- Built tools to detect and optimize slow queries in MySQL and MongoDB
- Conducted online schema migrations with pt-online-schema-change without downtime windows
- Developed internal Go applications for batch queries, GitLab-Jira integration, and MongoDB backup recovery
- Technologies: Debian, Ubuntu, Alpine, Go, Bash, Python, PHP, SQL, GitLab CI, Jenkins, Drone CI, MySQL, MongoDB, PostgreSQL, Redis, Elasticsearch, RabbitMQ, Kafka, Docker, Kubernetes, Nomad, Ansible, Terraform, Grafana, ELK, Prometheus, Datadog, Nagios, Zabbix, Nginx, HAProxy, Vault, Helm, SonarQube, Filebeat, Auditbeat, Google Cloud, AWS
Pierre Gronau
Last position:
Ansible Automation, Windows Third Level Support at DB InfraGO AG
- PRISMA project
- Ansible automation
- Windows third level support for Windows NT, Windows 2000, Windows 2013, Windows 2016, Windows 2019
Vladimir Maznicenko
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Louis Nguenkam
Last position:
Specialist in Adobe Experience Manager & Microservices at Nguenkam Consulting & Engineering
Java 11/21
Springboot
Swagger/OpenApi
Azure Pipelines
Trivy Integration
Apache Sling
OSGI
Java Content Repository (JCR)
Apache Jackrabbit Oak
Adobe HTL
GraphQL
Maven
GitLab
IntelliJ
Azure Cloud
Azure DevOps
Terraform
AEM specialist in the Scrum team
Development and deployment of microservices via Open API interfaces
Operation of microservices in the Azure Cloud
Implementation of AEM modules and integration with microservices
Member of the knowledge transfer team and a backend coordination team
Peter Brungs
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Ingo Cousin
Last position:
Founder, freelance CMS expert at CMS Consulting Cousin
- Freelance work as a CMS expert
Sebastian Thees
Last position:
Software Engineer / Cloud Engineer at OC Fulfillment GmbH
- Hybrid role as the first software engineer in the company to bootstrap the organization, laying out technical foundation and advising management on organizational aspects.
- Set up the SaaS platform architecture, selected languages and tools, and designed processes to deliver customer value quickly and reliably.
- Designed and implemented build and continuous deployment pipeline with multi-tenant approach enabling extreme scaling of the SaaS platform.
- Established initial ITSM and support processes, provided monitoring and alarming, and participated in the on-call team.
- Proposed new approaches to scale the platform and improve backend interfaces to mitigate bugs and communication overhead.
- Mentored new employees and served as a trustful team member and lateral leader.
- Conducted interviews for technical roles.
- Used technologies: Typescript, Node.js, Bash, Google Cloud Platform (App Engine, Cloud Run, Cloud Functions, Google Endpoints, Firebase), GitHub Actions, Docker, Terraform, MongoDB, Firebase, REST APIs, GraphQL.
Saood Yousaf
Last position:
Senior Application Owner at an international energy company
Further development of the application landscape for planning, forecasting and pricing
Communication with internal stakeholders to homogenize the application landscape across all entities
Optimization of vendor management
API and batch processing
Creation of operational concepts
Ensuring compliance with regulations and operational processes
Participation in solution design as well as implementation and further development of new applications and services
ServiceNow
Virtual Machines (Windows / Linux)
M365 Products
Azure DevOps
Web Applications
Last position:
Rewe Digital
- Creation of Spring Boot integration tests
- Creation of JUnit tests for the coupon system
- Creation of component tests for Kafka topics
- Creation of CI/CD pipeline scripts
- Creation of UI tests with Playwright
- Creation of UI tests with Cypress
- Review of developer unit tests
- Planning the test architecture for integration tests
- Creation of the test automation concept
- Evaluation and creation of test reports
Fabian Zur Heide
Last position:
Freelance IT Specialist
IT specialist Application Engineering / Software Development since 2012
Discover over 15,000 top freelancers
Statistics of experts using Apache Tomcat
Aggregated from the professional profiles of matched freelancers.
Experience
24 years
Position duration
2.9 years (Germany: 3 years)
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Insurance, Transportation
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
92% (Germany: 84%)
Master's degree or higher
67% (Germany: 53%)
Doctorate
17% (Germany: 8%)
Certifications per freelancer
2 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Cologne using Apache Tomcat
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Tomcat basics
Apache Tomcat is the servlet container many teams use to run Java web applications and Jakarta EE components. It serves JSP pages, handles HTTP requests, and hosts apps that need a stable runtime without the weight of a full application server.
Typical work
- Deploy and configure web applications
- Set up connectors, virtual hosts, and realms
- Tune memory, threads, and session handling
- Troubleshoot startup, classpath, and deployment issues
Ecosystem
Strong professionals working with Tomcat usually know Java, Maven or Gradle, SSL/TLS, reverse proxies, and logging tools. They also understand WAR packaging, servlet versions, and the differences between Apache Tomcat, Tomcat Server, and the broader Jakarta stack.
When to bring in help
Companies bring in freelance expertise when an app fails after an upgrade, when performance drops under load, or when a migration touches several environments. In Cologne, that often means support for internal business systems, customer portals, and integrations that need reliable Java runtime operations.
What good specialists do
Good Tomcat specialists read logs quickly, isolate configuration problems, and know when the issue sits in the application, the container, or the network path. They document changes clearly, work well with security and operations teams, and keep deployments repeatable.
Project fit
Tomcat expertise is a good fit for version upgrades, hardening, troubleshooting, and production support. Remote work is common for most tasks, while on-site collaboration in Cologne can help during release windows, cutovers, or when local teams need close coordination.
Frequently asked questions
Need clarity? These are the questions we hear most often about Apache Tomcat.
Apache Tomcat is used to run Java web applications, JSP pages, and servlet-based services. Teams choose it for stable deployment of internal tools, customer portals, and integration apps that need a straightforward HTTP runtime.
Tomcat is lighter than a full Java application server and focuses on the servlet container layer. If a project only needs web app hosting, request handling, and session management, Tomcat is often the simpler choice. If the system depends on heavier enterprise features, another runtime may fit better.
A strong Apache Tomcat specialist usually knows Java, servlet and JSP behavior, WAR packaging, and server configuration. Useful adjacent skills include HTTPS, reverse proxies, logging, Linux, and build tools such as Maven or Gradle.
Bring in Apache Tomcat expertise when deployments fail, upgrades break compatibility, or performance problems are hard to trace. It also helps when you need secure configuration, clean migration between environments, or production support during a release.
Most Tomcat work can be done remotely because the main tasks are configuration, log review, and deployment support. On-site can help in Cologne when a release needs tight coordination with local operations or other internal teams. The best setup depends on your change window and access rules.
Ask which Apache Tomcat versions they have supported, how they handle upgrades, and what they do when class loading or session issues appear. It also helps to ask about TLS setup, reverse proxy integration, and their approach to rollback planning.
A good Tomcat expert explains the root cause clearly and connects symptoms to server settings, application behavior, or infrastructure. Look for practical evidence in past work, such as clean deployment plans, security hardening, and fast troubleshooting under pressure.
Yes, because many Spring Boot apps still run on Apache Tomcat by default or use it as the embedded servlet container. It is also relevant for older Java web applications, shared hosting setups, and systems that need careful container-level control.
The average hourly rate of freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects is 93 €, which corresponds to a daily rate of about 743 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects, 92% hold at least a Bachelor's degree, 67% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.9 years.
The most common languages among freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects are German (100%), English (100%), and French (24%).
The most common industries among freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects are Information Technology (94%), Insurance (53%), and Transportation (47%).
The most common business areas among freelancers in Cologne, Germany who have used Apache Tomcat in their recent projects are Information Technology (100%), Product Development (76%), and Quality Assurance (59%).
Main locations of FRATCH Experts, who have recently used Apache Tomcat
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Frankfurt Request a free demo
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Philipp Thomaschewski
FRATCH CEO
