GlassFish Experts in Germany
matched in minutesHire experts who deploy Jakarta EE applications, configure GlassFish domains and connect enterprise services with databases, messaging and security. Get precise access to vetted, available freelancers for your project in Germany.
Meet FRATCH Experts in Germany, who have recently used GlassFish
Kiriakos K.
Last position:
Tech Lead / Architect : OTTO API Platform at OTTO
Maturing their API practices on both a business and technology level. My role covers strategy, architecture, developer advocacy as well as hands-on software engineering, enabling both technical teams and business leadership to adopt and act on API-centric principles effectively. Coincidentally, we also establish GitOps, DX and platform best practices with this project.
Highlights:
- Aligning executives with the initiative by clarifying strategy, replacing misconceptions and myths with facts, clarifying the value of existing assets and enabling informed decision-making
- Formulating a way forward for API Lifecycle Management at OTTO
- Driving platform progress and fostering developer engagement by hands-on engineering work towards strategic goals
API Lifecycle Management, Team Topologies, Organizational Evolution, Regulatory, Platform Advocate, Developer Platform, Communities of Practice, Terraform, Kotlin, Kafka, Kong, WSO2, Apigee, Gravitee, Backstage, AsyncAPI, OpenAPI, API Design, AWS, React, Node.js, TypeScript, Redocly, reactive programming, CDC, Golang, Gin, GitOps, DX (developer experience), stakeholder management, roadmaps, workshops, discovery.
Niko S.
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.
Sabahattin K.
Last position:
Sole responsibility (design, development, infrastructure, operations) at Own project busik.ch
- Ride-sharing and bus platform, live and fully functional. Backend with Spring Boot 4.1 on Java 21, PostgreSQL with Flyway, and Testcontainers integration tests. Hosted in my own AWS account (ECS Fargate, ALB, ECR, IAM Least-Privilege) with CI/CD via GitHub Actions and OIDC federation without static credentials. Development fully AI-supported with Claude Code, including custom skills and project-specific memory. Spring Boot · Java 21 · PostgreSQL · Flyway · Docker · AWS ECS/ALB/ECR · CI/CD · GitHub Actions · Claude Code
Ronald M.
Last position:
DevOps Consultant at M.it services & systems GmbH
- Adaptation, optimization, configuration, and administration of a multi-stage GitLab instance with over 250 users
- Setup, adaptation, expansion, and optimization of infrastructure, configuration, and monitoring
- Provisioning of services and handover to production
- System environment: DependencyTrack, GitLab, Grafana, Hedgedoc, Kubernetes, Oauth2 Proxy, Openstack, Prometheus, Syseleven
Santhosh K.
Last position:
Freelance Software Engineer at Zalando SE
- Drive migration of enterprise authorization platform from Styra DAS to open-source OPA via Skipper (Zalando's Golang-based ingress proxy) integration
- Optimise k8s resources and integrate native Prometheus metrics with OPA
- Migrate from internal monitoring solution to Prometheus CRs + Dash0
Tech Stack: Java/Kotlin, Golang, Python, Spring Boot, AWS, Kubernetes, Docker, OpenTofu, Prometheus, Grafana
Stephan H.
Last position:
Development, Tester at Telecommunications
Set up an operational contract information system. This is mainly used as an order management system - for migrating existing contracts as well as for creating and providing new contract bundles.
Sales agents can use it to order new services, modify existing ones and migrate service types, as well as provide price information to the customer.
This supports the marketing of new services as well as the replacement of old services for existing customers.
In addition, existing data is imported, processed (ETL) and provided via services for further use in the portal front end.
Analysis of the business and technical use cases (workflows, involved processes/systems, communication paths, security requirements)
Further development / creation of the front-end components (React/JavaScript)
Design and implementation of the business logic
Creation of the functional and technical component documentation
Test execution / test automation (Cypress, test coverage)
Team size: 8 people
Technologies: React, JavaScript, Rest (JSon), Yaml, Markdown, MariaDB (SQL), Docker, Swagger, Cypress
Tools: Webstorm, ReactDeveloperTools, VisualStudioCode, Word, DBeaver, Git/GitLab
Work management: GitLab
Platform: Linux
Build management: GitLab
Vitaliy R.
Last position:
DevOps GitOps (temp) at Signal Iduna
- Responsible for Openshift/Kubernetes on-prem administration and developer support.
- Developed URP infrastructure automation with Python, Ansible, Kustomize and ArgoCD, Argo Workflow/Events stack.
- Wrote smoke and load tests for URP infrastructure utilizing Python, Kustomize and ApplicationSets.
- Helped to set up and deploy URP infrastructure in Google Cloud, GKE.
- Set up monitoring for URP and ArgoCD stack with Splunk Cloud.
- Performed system administration tasks across RedHat Linux, Kubernetes/Openshift, ArgoCD, GitLab, Bitbucket Enterprise, Kafka and MongoDB.
Toralf C.
Last position:
IT Consultant in PKI Software Development at BWI
- Implementation of a full-stack application with Angular as the frontend framework and Java as the backend language
- Use of the Swagger OpenAPI specification for REST communication between the frontend and backend applications
- Control of a card printer via the Nexus Card SDK framework
- Design and implementation of card management software with a web interface and a JavaFX module for printer monitoring
- Use of Cucumber tests for test automation and creation of test artifacts to test outside the development environment
- Use of Wireshark for network investigations to analyze the API of a third-party product and to monitor the REST API of the self-developed software
Nikunjkumar P.
Last position:
Senior Java Backend Developer at Questax Professionals GmbH
- Provide the Price Listing Service team with prices for all cars and vans in different markets
- Adapt market-specific requirements such as taxes, government subsidies, campaigns
- Import and synchronize new prices for all new and existing cars and store them in the Redis datastore
- Support our product and on-call duty
- Daily business, development of new features, bug fixing
- Pair programming, code review, mob programming
- Develop POCs for new ideas
- Maintain and extend the backend
- DevOps tasks
- Run Kubernetes updates
- Adjust and further develop Kubernetes resources
- Develop and adapt Helm charts
- Adapt and update ArgoCD
- Maintain, adapt, and improve CI/CD
Will O.
Last position:
Solution Architect at Stuttgart Police Authority
Designing the migration strategy for WLS applications to the BKA cloud and Stack IT
Creating a hybrid cloud for internal testing and development with Kubernetes
Transforming the IT landscape from a legacy monolithic architecture to a cloud-based architecture
Integrating new CI/CD processes using Azure Pipelines
Quadrupled the throughput of personnel security checks
Migrated personnel security clearance applications to Docker-based applications
Built CI/deploy pipelines with Azure DevOps
Environment: Java Spring Boot, Kubernetes, Oracle WebLogic, OpenID, Camunda, JUnit, TOGAF
Manish K.
Last position:
Freelance Senior Solutions Architect at YoungIT
- Worked with a UK based organisation offering a range of free sexual health services such as STI testing, treatment and contraception across the UK
- Created a Liferay DXP based customer facing portal (version 7.4) over Liferay Experience Cloud
- Designed and developed Liferay modules
- Managed Liferay Experience Cloud and release management
- Coordinated with different teams and helped other team members on Liferay challenges
- Engaged in discussions with business and stakeholders on expectations
- Implemented architectural best practices
Felix S.
Last position:
System Consultant / Consultant at Freelance work
- Projects in the area of Identity and Access Management, Single Sign-On, and LDAP directories
- Development of Java modules
- Development and administration of Java/J2EE-based applications on different application servers
- Administration of Unix systems (Linux, Solaris, AIX) and applications
- Migration of systems
Maik S.
- Development of a new generation of Spring Boot microservices for an archiving system on OpenShift, monitoring, security analyses
Stack: Java, Spring Boot, Kafka, Vaadin, OpenShift 4.x, Maven, Artifactory, Jenkins, Git/Github, GitHub Copilot, GitOps, CI/CD, Kargo/ArgoCD
Celso K.
Last position:
SAP Commerce Cloud FullStack Developer at Spar
- Implementation of a GitLab CI/CD pipeline based on SAP Commerce Cloud 2211
- Development of a new B2C shop with Vue, Node and TypeScript to ensure scalability, extensibility and performance optimization
- Integration of Microsoft Azure Event Grid with SAP Hybris
- Implementation of BDD with Cucumber using Gherkin syntax to promote collaboration between development and business teams
- Support and customization of a Spartacus shop
- Technologies/Languages: Java, REST, OData, Behavior Driven Development (BDD), Cucumber, Node, Vue, TypeScript, Spartacus, GitLab CI/CD, Gradle, Maven, Ant, SonarQube
Dimitry K.
Last position:
Rollout Expert at Everience Germany GmbH
- Project: Mazars Windows 11 rollout: responsible for the Windows 11 rollout at customer Mazars
- Understand customer-specific requirements (hardware compatibility, application dependencies, Microsoft AD group policies)
- Implement hardware logistics at customer sites
- Involve the IT, business, security, and compliance teams
- Update the infrastructure
- Carry out driver and firmware updates
- Automate the rollout with scripts
- Notify users, provide FAQs, change logs, and support contacts
- Technologies: Baramundi Management Center, AD, Azure AD, Intune, Office 365, OpenProject, RDP, Topdesk, MS Teams, PowerShell
Discover over 15,000 top freelancers
Statistics of experts using GlassFish
Aggregated from the professional profiles of matched freelancers.
Experience
25 years
Position duration
2.1 years
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
94%
Master's degree or higher
55%
Doctorate
10%
Certifications per freelancer
4
Most common languages
English, German, Spanish
Speak two or more languages
100%
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany 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 Germany using GlassFish
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
GlassFish 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 (63%)
- Automotive (56%)
- Insurance (44%)
- Transportation (44%)
- Retail (44%)
- Government and Administration (39%)
- Telecommunication (37%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
GlassFish at a glance
GlassFish is an open-source application server for Jakarta EE, formerly known as Java EE. It provides a runtime for enterprise web applications, REST services, persistence layers and business components. Teams use it when they need a standards-based server with a clear Jakarta EE reference implementation.
Applications and systems
GlassFish runs applications that depend on managed transactions, dependency injection, authentication and scalable web services. It is common in public-sector systems, financial services, education, logistics and other environments with structured enterprise integration needs.
- Jakarta EE web and REST applications
- Enterprise services with transactions and persistence
- Secure applications with role-based access
- SOAP or REST integration layers
Ecosystem and tooling
Strong specialists work across GlassFish administration, Jakarta EE APIs and the surrounding Java ecosystem. Relevant skills include CDI, JPA, JAX-RS, EJB, JMS, Servlet, JDBC and deployment descriptors. They may also use Maven, Gradle, Git, Docker, application monitoring and relational databases such as PostgreSQL or Oracle Database.
When companies need help
Freelance expertise is useful when a team is modernising a Java EE estate, moving from an older GlassFish release, or preparing a migration toward Jakarta EE. Specialists can also stabilise deployments, improve configuration, diagnose class-loading problems and establish repeatable delivery pipelines.
- A legacy application needs a controlled server upgrade
- Production deployments are inconsistent across environments
- Performance or connection-pool issues are difficult to isolate
- Internal teams need support with Jakarta EE migration
What strong specialists deliver
Experienced professionals understand the application code and the server beneath it. They create domain and cluster configurations, tune JVM and pool settings, secure certificates and realms, and document deployment procedures. They also separate application defects from GlassFish configuration issues instead of treating every failure as a code problem.
Working with experts in Germany
GlassFish projects can be handled remotely when documentation, access controls and deployment responsibilities are well defined. On-site collaboration may help during regulated rollouts, data-centre changes or handovers to local operations teams in Germany. Clear communication in English is common, while German can matter for stakeholder workshops and operational documentation.
Frequently asked questions
Quick answers to the questions that come up most around GlassFish.
GlassFish is used to run Jakarta EE applications, including REST services, web applications and transactional business systems. It supplies managed services for security, persistence, messaging, dependency injection and deployment.
GlassFish is closely associated with the Jakarta EE reference implementation and is often chosen for standards alignment and straightforward application-server testing. Payara builds on GlassFish with additional operational features, while WildFly offers a separate Jakarta EE implementation and ecosystem, so the best choice depends on support needs, existing configuration and migration plans.
A strong GlassFish specialist should understand Jakarta EE APIs such as CDI, JPA, JAX-RS, JMS and Servlet. Practical experience with Maven or Gradle, Docker, relational databases, Git, JVM diagnostics and CI/CD is also valuable.
For a simple deployment, a professional familiar with Jakarta EE and domain configuration may be sufficient. Complex production work calls for a GlassFish specialist who can troubleshoot clustering, security, connection pools, class loading and migration risks in the context of the application.
Yes. GlassFish administration and application delivery can usually be performed remotely with secure access, good runbooks and coordinated release windows. On-site presence in Germany can still be useful for data-centre changes, regulated environments or operational handovers.
A company may review alternatives when its current GlassFish release lacks the desired support model, operational tooling or upgrade path. A GlassFish professional can compare Payara, WildFly and other Jakarta EE runtimes against application compatibility, support requirements and migration effort.
Ask for examples of diagnosing deployment failures, configuring domains, securing applications and supporting production releases. A capable GlassFish freelancer explains trade-offs clearly, tests changes safely and leaves behind useful configuration and operating documentation.
GlassFish work often involves Jakarta EE, Maven or Gradle, application packaging, database connectivity and deployment automation. Professionals should also be ready to work with monitoring, certificates, reverse proxies and the transition from older Java EE terminology to current Jakarta EE APIs.
The average hourly rate of freelancers in Germany who have used GlassFish in their recent projects is 92 €, which corresponds to a daily rate of about 733 € based on an 8-hour working day.
Of the freelancers in Germany who have used GlassFish in their recent projects, 94% hold at least a Bachelor's degree, 55% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Germany who have used GlassFish in their recent projects have 25 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Germany who have used GlassFish in their recent projects are English (100%), German (98%), and Spanish (10%).
The most common industries among freelancers in Germany who have used GlassFish in their recent projects are Information Technology (100%), Banking and Finance (63%), and Automotive (56%).
The most common business areas among freelancers in Germany who have used GlassFish in their recent projects are Information Technology (100%), Product Development (95%), and Quality Assurance (76%).
Main locations of FRATCH Experts, who have recently used GlassFish
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 Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg 
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FRATCH CEO
