Jakarta EE Experts in Hamburg
, matched in minutes with vetted and available freelancersHire experts who design secure Java enterprise applications, modernize Java EE systems and integrate Jakarta EE with cloud-native services, databases and messaging. FRATCH connects you with precisely matched, vetted and available freelancers quickly.
Meet FRATCH Experts in Hamburg, who have recently used Jakarta EE
Rainer D.
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
Rolf G.
Last position:
Developer & Designer at Sicherheitsbehörden
- Migration of a case management system with numerous interfaces to other systems from Spring and Activiti to a Java JEE application
- Further development toward a cloud application
- Consulting, development, requirements analysis, specification and design
- Coordination with upstream and downstream systems
- Data modeling, programming and implementation
- Support with code reviews and ensuring clean code in the PL/SQL context
- Documentation in Confluence
- Troubleshooting of PL/SQL applications, including log analysis, session tracing and performance profiling
- Optimization and tuning measures in the PL/SQL environment
- Knowledge transfer and onboarding of new employees
- Use of Jira for task management, progress tracking and sprint planning
Maciej W.
Last position:
Senior Software Engineer at EQS Group GmbH
- Further development of the compliance products
- Responsible for the Senior Software Engineer role
- 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
Peter N.
Last position:
Pilot testing AI tools & sabbatical for house renovation
- Pilot testing local AI environments to explore local AI use cases and cloud-based AI solutions
- Evaluation of AI tools and techniques
- Use of local AI tools with own data sovereignty
- Prompt engineering
- Creation of example environments for speech-to-text, text-to-speech, text-to-image, text-to-video, and image-to-video
Tools: Grok, Perplexity, ChatGPT, Elevenlabs, Github, Ollama, HuggingFace, Open WebUI, Faster Whisper, LibreTranslate, WSL, Docker Desktop, Shotcut, Audacity, Sound eXchange, Ffmpeg, Coqui TTS, Pinokio, Stable Diffusion Web UI, ComfyUI, OWL, Void Editor
David A.
Last position:
Senior SAP Commerce Cloud Developer at Freelancer
- Integration of SAP Commerce Cloud with SAP Cloud for Customer
- Creation and execution of unit and integration tests
- Error analysis and bug fixing
Taher S.
Last position:
DevOps Engineer at Confidential
- Working with developers, security, and operations teams to align requirements
- Supporting product owners and development teams in using logging and monitoring solutions based on the Elastic Stack
- Developing and standardizing log schemas as well as defining practical standards for observability
- Designing and further developing logging architectures for complex, distributed multi-tenant environments
- Connecting application and infrastructure logs as well as security tools and metrics
- Optimizing data flows and modeling for analysis and reporting purposes
- Building automated infrastructures using Terraform/Terragrunt and Ansible
- Maintaining and further developing CI/CD pipelines in GitLab as well as automated development environments in Hetzner Robot
- Operating and automating Proxmox clusters including Ceph storage
- Setting up and operating Kubernetes (k3s) clusters on Fedora CoreOS including base services such as Vault, OpenLDAP, and HA Proxy
- Implementing security-critical infrastructures according to BSI baseline protection and securing existing systems
- Supporting the operation of solutions in cloud environments (including AWS)
- Working in agile teams using Scrum and Kanban
- Technologies/ applications: Elastic Stack (Elasticsearch, Logstash, Beats/Elastic Agent, Kibana), Terraform, Terragrunt, Ansible, GitLab CI/CD, GitOps, Proxmox, Proxmox Ceph, Kubernetes (k3s), OpenShift, Helm, Kustomize, Vault, OpenLDAP, HA Proxy, Hetzner Robot systems, AWS, Prometheus, Grafana, Syslog Linux/Windows, Docker, NGINX, Apache Security & Compliance (BSI baseline protection, SIEM/SOC)
Andreas S.
Last position:
Lead Developer at Software
- Extended the document management system with a standard CMIS (Content Management Interoperability Services) interface
- Implemented CMIS core services like navigation, access rights, search, CRUD operations, and versioning in Java
- Implemented based on RESTful / OpenAPI services
- Delivered as a fat-jar and native container image
- Deployed on-premises and serverlessly as an Azure Container Application using Terraform
- Improved team autonomy through infrastructure engineering and short feedback loops
- Established observability with OpenTelemetry, Azure Monitor, and Azure Logic Apps
- Introduced Terraform and trunk-based development processes
- Ensured quality with BDD tests in C# using SpecFlow and Testcontainers
- Created Azure DevOps pipeline integration tests
- Introduced cloud deployment processes
- Trained staff in cloud and Terraform
Johannes E.
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.
Silke W.
Last position:
Head of Project Management and Consultancy at Systemtechnik GmbH
- Planning of projects and consulting services: professional, technical and commercial, focusing on transformation for public transport
- Identification and assessment of project risks with development of measures and recommendations for risk minimization and avoidance
- Evaluation of projects and reporting
- Execution of projects and delivery of consulting services on time, with required quality and within budget
- Project, hardware and consulting services forecasting
- Disciplinary and professional staff management
- Team development and coaching
- Resource planning across various locations
- Stakeholder management
- Client management with service and support
- Development of contingency plans
Matti L.
Last position:
FullStack Developer at Ing DiBa GmbH
- Developed and extended Fiori UI5/WebApps for areas such as general ledger, asset accounting, and others.
- Implemented backend logic and OData services for a new S/4 HANA system
- Analyzed the current state of SAP GUI transactions and derived suitable standard and custom developments
- Designed technical concepts and implemented custom UI5 apps in the Fiori Launchpad
- Automated OPA tests, extended and adapted standard Fiori apps
- Documented and created developer manuals in the wiki
- Conducted code reviews, approved and delivered software units via GitLab and SAP transports
Christopher S.
Last position:
Relaunch news platform Spiegel Online at Spiegel Tech Lab GmbH
- Implemented business relevant features for the news platform
- Performed technical consultancy for system architecture
Armin J.
Last position:
Managing Director/Partner at Disolpa GmbH
Marcel S.
Last position:
Product Manager | Product Owner | Guidewire Expert | Agile Leader
Guido S.
Last position:
Freelancer at IT Consulting GS
Discover over 15,000 top freelancers
Statistics of experts using Jakarta EE
Aggregated from the professional profiles of matched freelancers.
Experience
26 years (Germany: 23 years)
Position duration
1.9 years (Germany: 2.2 years)
Positions per freelancer
18 (Germany: 15)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Transportation
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
83% (Germany: 92%)
Master's degree or higher
58% (Germany: 54%)
Doctorate
8% (Germany: 6%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
93% (Germany: 96%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Hamburg are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Discover detailed Jakarta EE rate benchmarks:
Explore rate insightsAverage rates of experts in Hamburg using Jakarta EE
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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Jakarta EE experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Banking and Finance (50%)
- Transportation (50%)
- Retail (50%)
- Automotive (43%)
- Insurance (43%)
- Manufacturing (43%)
- Professional Services (43%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Enterprise Java foundation
Jakarta EE is the open standard for building secure, modular enterprise applications on the Java platform. Formerly known as Java EE, it provides specifications for web APIs, dependency injection, persistence, transactions, messaging and security. Companies use it for business-critical systems that need clear contracts, long-term maintainability and reliable runtime behavior.
Applications and services
Jakarta EE supports transactional backends, REST APIs, server-rendered web applications and integration services. It is common in banking, insurance, logistics, public administration and manufacturing, including systems that connect records, workflows and external services.
- Design RESTful services with Jakarta REST
- Build persistence layers with Jakarta Persistence
- Implement business logic with Contexts and Dependency Injection
- Connect asynchronous workflows with Jakarta Messaging
APIs and ecosystem
Professionals work across specifications such as Jakarta Servlet, Jakarta RESTful Web Services, Jakarta Persistence, Jakarta Transactions and Jakarta Security. They also understand runtimes including WildFly, Payara, Open Liberty and GlassFish, along with Maven, Gradle, relational databases, containers and application monitoring.
When expertise matters
Freelance specialists are useful when a company is modernizing a Java EE estate, moving between application servers or splitting a large application into services. They can establish migration plans, resolve compatibility issues, improve deployment pipelines and document decisions for internal teams. In Hamburg, remote work can support local product, logistics and industrial teams, while on-site collaboration may help during integration or release phases.
- Migrate packages and specifications from Java EE to Jakarta EE
- Upgrade application servers and deployment configurations
- Stabilize transactions, persistence and messaging
- Connect legacy systems with REST and event-driven services
What strong specialists bring
Strong Jakarta EE professionals combine specification knowledge with practical production experience. They know how application servers manage resources, how transaction boundaries affect data, and how to keep APIs secure and observable. They also test under realistic load, review dependency choices and explain trade-offs clearly in English or German when working with Hamburg-based teams.
Assessing project fit
Start with the runtime, Jakarta EE release, deployment model and business-critical integrations. Ask for examples of comparable migrations, API design, persistence tuning and incident resolution rather than relying on framework familiarity alone. A good specialist can describe the system context, identify risks early and leave behind tested code, repeatable builds and useful operational documentation.
Frequently asked questions
Not sure where to start with Jakarta EE? These answers cover the essentials.
Jakarta EE is used to build secure and transactional enterprise applications on Java. Typical deliverables include REST APIs, web applications, integration services and backend systems connected to databases, messaging infrastructure and identity providers.
Jakarta EE is specification-driven and relies on standardized APIs supplied by an application runtime. Spring Boot offers a highly integrated framework and convention-based setup, so the better choice depends on portability, existing skills, runtime standards and the structure of the system.
Jakarta EE is the successor to Java EE, with the technology stewarded through the Eclipse Foundation. The move included a namespace change from javax to jakarta, which can affect source code, dependencies, application servers and migration testing.
A strong Jakarta EE specialist usually works with SQL databases, Maven or Gradle, Git, REST, containers and automated testing. Knowledge of WildFly, Payara, Open Liberty, cloud deployment, observability and messaging is also valuable for production systems.
The right Jakarta EE experience depends on the system’s risk and scope, not on a fixed tenure requirement. A migration or high-volume transaction system calls for evidence of application-server upgrades, transaction design, performance work and production incident handling.
Jakarta EE work is often suitable for remote collaboration because code, builds, tests and infrastructure can be shared digitally. On-site time in Hamburg may still help with architecture workshops, access-controlled environments, integration testing or coordination with operations teams.
Ask a Jakarta EE specialist to explain a real system decision involving transactions, persistence, security or application-server configuration. Review how they test failure cases, manage dependencies, document deployment steps and distinguish specification behavior from vendor-specific features.
Jakarta EE can support cloud-native services when applications are designed for containerized deployment, externalized configuration, health checks and clear service boundaries. Teams may also combine it with Kubernetes, CI/CD, messaging and observability tools, while choosing lighter frameworks where the workload demands them.
The average hourly rate of freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects is 96 €, which corresponds to a daily rate of about 770 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects, 83% hold at least a Bachelor's degree, 58% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects are German (100%), English (93%), and French (29%).
The most common industries among freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Banking and Finance (50%), and Transportation (50%).
The most common business areas among freelancers in Hamburg, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Product Development (93%), and Project Management (64%).
Main locations of FRATCH Experts, who have recently used Jakarta EE
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.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
