Apache Maven Experts in Hamburg
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Meet FRATCH Experts in Hamburg, who have recently used Apache Maven
Niko Schmuck
Last position:
Developing Architect, Technical Lead "gridlytics" at HH Energienetze
- Building a data integration platform for high, medium, and low voltage assets for contextual analysis of time series with master data from the SCADA control system (IEC 60870 104), INIS, and SAP.
- Responsibility for the architecture and implementation of the solution, as well as sparring partner for the Product Owner.
- Use of Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter, and various API gateways.
Daniel Sedlack
Last position:
Senior Software Engineer at energielenker solutions GmbH
- Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
- Defined time-based and dependency-based jobs
- Deployed to managed Kubernetes clusters using Helm
- Integrated InfluxDB Cloud
- Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
- Developed dashboards and visualizations in Grafana
- Developed unit tests with mocking using pytest
- Set up a CI/CD pipeline in GitLab
Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud
Anastasiia Komarenko
Last position:
Senior Test Automation Engineer at E.ON
- Reviewing functional and technical requirements from a testing perspective
- Creating test cases and automated tests to validate requirements
- Performing manual and automated functional, end-to-end, and regression tests
- Documenting test results and tracking defects
- Using models like GPT-4, BERT, and Hugging Face Transformers for automated test case generation, analysis of test results, and improving test coverage, including bias checks and security reviews
- Techs: MS Office, Jira, Zephyr, Confluence, Tosca, stakeholder communication, Agile, Kanban, Scrum, OpenAI API, Hugging Face, PyTorch, LangChain.
Rainer Diekmann
Last position:
Enterprise Architecture Management / Backend Software Developer at Polizei Hamburg
- Several projects in a police context
- Model and document police procedures/projects with Archimate (as-is/to-be) in the context of P20 (BKA)
- Create software architectures with microservices
- POC development with Springboot/Docker/Kubernetes
- Project size: 10 people
- Enterprise architecture management with Togaf and Archimate
- Backend software development Springboot
- DevOps with Kubernetes
- Implemented using: Java 17/21, Springboot 3, P20 architecture, Togaf, Archimate
Alex Odesser
Last position:
Contractor at Telefonica Germany GmbH & Co. OHG
- Data-analysis, Preparation, gathering and coordination of business requirements for retrieval of monthly- and long term (CLV – relevant) cost- and revenue-components per contract for a customer–base–grouping project (HUB–Project) for B2C-Postpaid-Controlling
- Concept and Implementation of cost- and revenue-KPIs calculation and corresponding CLV–reports (Oracle, Perl, SVN, MS SQL Server, MS Power BI, Serviceware Performance Analytics)
- Operational support of the HUB-Project – various ad-hoc reports, deployments, job-scheduling etc. (Oracle, SVN, BICSuite–Scheduler, DWSODA etc.)
- Analysis, implementation, retrieval and reporting of various physical and financial KPIs for B2P-Prepaid Business on an existing data-mart (Oracle, Perl)
Sridhar Huple
Last position:
SAP CX Consultant at Anonymous
- Stack: SAP Commerce 2011 (B2C).
- Migrating the data from Stibo system to SAP Commerce Cloud.
- Mapping the data from Stibo system to SAP Commerce Cloud.
- Integrating hot folders to support multiple countries and languages.
- Integrating validation tools for migrated data and generating validation reports.
Oliver Langer
Last position:
Developer, Architect at libri GmbH
- Role: Developer, Architect
- Technologies: java, typescript, golang, spring (boot, web, security, data), Angular, AWS (OpenSearch, Aurora, SNS/SQS, CloudWatch, EC2, IAM), Kubernetes, Terraform, Helm, OAuth, Keycloak, CI/CD, gradlew, Liquibase, Test Driven Development, shell scripting
Florian Fittkau
Last position:
Solution Architect with Developer Focus at SymFinIT Solutions GmbH
- Further development of a finance layer for subscription and one-time purchase billing and accounting.
- Technologies: Kotlin, AWS (SQS, S3, ElastiCache, Aurora), React, TypeScript, Coroutines, IntelliJ IDEA, Spring (Boot, Data, WebFlux), JUnit, Testcontainers, Cucumber, Liquibase, PostgreSQL, Webservices (REST), R2DBC, OpenAPI 3, Gradle, GIT, Docker, Netty, GitHub Actions, Jira/Confluence, arc42
Mbah Sama
Last position:
Software Tester for Banking Requirements at comdirect
- Responsibility for testing and quality assurance of application processes
- Creation and execution of test cases based on defined acceptance criteria
- Documentation of deviations and analysis, as well as initiation of necessary corrective actions
- Ensuring the flow of information within the team and with other specialist departments
- Maintenance and further development of test automation
- Adapting Selenium-based automation to every release and sprint change
- Extending test automation with new processes
- Performing security tests
- Identifying typical vulnerabilities (e.g. XSS, SQL injection, insecure headers) through automated tests in the CI/CD flow
- Use of technologies Selenium (including integration with security scanners such as OWASP ZAP), Unix/SQL environments and optionally Cypress, SAP, C#, Java, GitLab, Jira, Confluence, REST API, Postman, HP-ALM, SSI, Octane, WinSCP.
Maciej Wilanowski
Last position:
Senior Software Engineer at EQS Group GmbH
- Further development of the compliance products
- Role responsibility as a Senior Software Engineer
- Team size: 5 - 15 people
- Tools: TypeScript, Angular 18, Node.js, Nest.js, AWS, Kubernetes/Helm Charts/Docker, GitLab (CD/CI), Elasticsearch, MySQL, OpenAI, Java, RabbitMQ
Johannes Erchen
Last position:
Libri GmbH
- Operation and further development of the inventory system for booksellers (Quimus). It is an in-house development by Libri that is sold to customers as Software as a Service. The software is developed in an agile way by two developer teams (about 5 developers each). The software consists of around 25 Java microservices that mainly communicate via messaging and share a common Angular frontend. The application runs on Kubernetes in AWS.
- Technologies used: Java 17 & 21, Spring Boot 2 & 3, Hibernate, MySQL, Spring Cloud AWS, Lombok, AWS SQS, AWS SNS, AWS RDS, AWS S3, DynamoDB, Kubernetes, Docker, OpenSearch, Hibernate Search, Liquibase, Gradle, Terraform, Helm, GitLab CI, Keycloak OAuth2, TypeScript, Angular
- My focus until December 2023: Connecting additional POS systems to the inventory system. Connecting the data warehouse for report display. Extending existing features (goods receipts, invoicing, item management, ...). Operations and DevOps tasks.
- Focus from January 2024: Extracting the product search from the inventory system into a global service to use in other applications. Integrating the product search into the booksellers' online shops (also run by Libri). Importing and providing digital items in the product search.
Adrian Hollay
Last position:
Interim Consultant for Oracle Database Migrations to the AWS Cloud at Bank Deutsches Kraftfahrzeuggewerbe GmbH
- Migration of Oracle databases from on-premise to the AWS Cloud
- Support for technical Oracle solutions and cloud database infrastructures (IaaS and PaaS) RDS vs. EC2, sizing for performance
- Creation and maintenance of DR/HA (Disaster Recovery/High Availability) and backup and recovery policies and procedures (multi-region backup)
- Support for Oracle license selection, Enterprise → Standard migration
- Monitoring database instances
- Implementation and maintenance of database security (wallet, SSL)
- Patch management and version control
- Automated installation and configuration of Oracle databases using Terraform and Ansible
Bilal Oguz
Last position:
Test Analyst / Test Engineer at von der Qualidence Consultancy GmbH
- Manual acceptance testing of web and Swing clients as well as mobile applications across different teams/products
- Requirements management, test analysis, and submission of review results
- Preparation and execution of smoke, regression, and user acceptance tests
- Test case design using test design techniques for user stories with acceptance criteria in XRay; import of Excel test sheets into Jira XRay
- Creation, preparation, and execution of API tests with Postman and documentation in Jira XRay
- Taking on greenfield projects for the acceptance of the web app
- Proactive collaboration with the team (developers, POs, and test manager)
- Acceptance of development and deployment of content elements on the web with TYPO3 CMS
- Tools used: Jira + XRay, Postman, Confluence, web & Swing applications, mobile app, BrowserStack, Figma, Robot Framework, Excel
Marcel Seifert
Last position:
Lead Developer / Software Architect at Rezeptprüfstelle Duderstadt GmbH
Responsible for the redevelopment of a billing and validation software for prescriptions to fully check and analyze e-prescriptions for correctness (content, billing)
System consists of multiple contexts running as services (Docker containers):
Checking and processing data deliveries via FTP and email
Management of invoicing, clearings, deductions and offsets
Management and execution of validation rules and test sets
Analytics based on Metabase
Developer Stack: Kotlin, Vue 3 / Vuetify 3, ANTLR, Spring Boot 3, REST API, Gradle, Docker, GitLab, PostgreSQL, Kafka, Keycloak, Scrum, Grafana, Loki, Testcontainers, Prometheus
Guido Schmetkamp
Last position:
Freelancer at IT Consulting GS
Discover over 15,000 top freelancers
Statistics of experts using Apache Maven
Aggregated from the professional profiles of matched freelancers.
Experience
24 years (Germany: 20 years)
Position duration
2.2 years (Germany: 2 years)
Positions per freelancer
17 (Germany: 15)
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Energy, Banking and Finance
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
85% (Germany: 92%)
Master's degree or higher
54% (Germany: 55%)
Doctorate
15% (Germany: 8%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
93% (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 Hamburg 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 Hamburg using Apache Maven
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
What Maven does
Apache Maven is a build and project management tool for Java teams. It defines how code is built, tested, packaged and released through a clear project model. Companies use it to keep dependencies, versions and repeatable builds under control.
Where it fits
Maven appears in backend services, shared libraries, internal tools and enterprise applications. It is common in teams that need a standard build flow across many modules and environments.
Core skills
- Reading and shaping the pom.xml file
- Managing dependencies and transitive conflicts
- Working with plugins for compile, test, package and deploy steps
- Handling multi-module projects and release flows
- Connecting Maven with CI pipelines and artifact repositories
When companies bring in help
Freelance Maven experts are useful when builds become slow, unstable or hard to understand. They also help during framework upgrades, dependency cleanups and repository migration. In Hamburg, they often support teams that work with distributed stakeholders and need clear handover notes.
What good specialists deliver
Strong Maven professionals do more than fix a broken build. They simplify the project structure, remove version drift and document the rules that keep releases predictable. They also understand how Maven interacts with Java, Spring, testing tools and repository managers.
Ecosystem and signals
Look for people who know:
- Maven Central and private artifact repositories
- Surefire and Failsafe for test execution
- Shade, Enforcer and other common plugins
- Java release alignment and dependency hygiene
- Practical troubleshooting of build failures and CI issues
Frequently asked questions
Everything clients usually want to know about Apache Maven, in one place.
Apache Maven is used to define, build and package Java projects in a repeatable way. It manages dependencies, runs tests and produces artifacts for deployment. That makes it a core tool for teams that want consistent builds across local machines and CI pipelines.
Maven follows a convention-driven model with a clear project file and predictable lifecycle. Gradle is more flexible and script-like, which some teams prefer for complex build logic. Many companies choose Maven when they want structure, standardization and easier handover.
Apache Maven projects often accumulate dependency conflicts, duplicate plugins and unclear profiles over time. A specialist can clean up the pom.xml, reduce build noise and make the setup easier to maintain. This is especially helpful before a release train, migration or team handover.
A strong Maven specialist usually knows Java build lifecycles, dependency management, repository setup and CI integration. Familiarity with Spring, testing tools, artifact repositories and release workflows is also common. Those adjacent skills matter because Maven sits in the middle of the delivery chain.
A simple build fix may need only targeted support, while a multi-module platform or migration needs deeper experience. Apache Maven work often becomes tricky when versions, plugins and repository rules interact. If your build affects many services, bring in someone who has handled that kind of complexity before.
Yes. Maven work is usually well suited to remote collaboration because most tasks live in code, build files and CI logs. On-site time can still help during workshops, release planning or when many local teams need the same build standard.
Look for clear explanations, stable builds and a clean dependency graph, not just quick fixes. A good Apache Maven professional documents the change, explains trade-offs and leaves the project easier to maintain. They should also understand why a build failed, not only how to make it pass.
Yes, because many Spring Boot and Java projects still rely on Maven for dependency control, packaging and release automation. Even when other tools are in the stack, Maven may remain the standard build layer. That is why it is still common in enterprise systems and long-lived codebases.
The average hourly rate of freelancers in Hamburg, Germany who have used Apache Maven in their recent projects is 99 €, which corresponds to a daily rate of about 792 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Apache Maven in their recent projects, 85% hold at least a Bachelor's degree, 54% hold at least a Master's degree, and 15% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used Apache Maven in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Hamburg, Germany who have used Apache Maven in their recent projects are German (100%), English (93%), and French (13%).
The most common industries among freelancers in Hamburg, Germany who have used Apache Maven in their recent projects are Information Technology (100%), Energy (60%), and Banking and Finance (60%).
The most common business areas among freelancers in Hamburg, Germany who have used Apache Maven in their recent projects are Information Technology (100%), Product Development (93%), and Business Intelligence (67%).
Main locations of FRATCH Experts, who have recently used Apache Maven
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 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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Philipp Thomaschewski
FRATCH CEO
