Jersey Experts in Germany
matched in minutes by AIHire experts who design JAX-RS APIs, integrate Jersey with Jakarta EE and Spring environments, and deliver production-ready REST services with strong testing and documentation. FRATCH matches you quickly with vetted, available freelancers whose skills fit your project.
Meet FRATCH Experts in Germany, who have recently used Jersey
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.
Armin V.
Last position:
Software Developer at DFS GmbH
- TANGe is a DFS project to introduce a modern digital tower system that is meant to make airport air traffic handling safer, more efficient, and future-ready. My current task in this project is the development of the Runway SID Assignment Service, which is responsible for assigning departure routes from an airport. SID - Standard Instrument Departure stands for a standardized departure route.
Software: Java, microservices, Kafka, Robot Framework, Gitlab, Kubernetes, Docker
Christof H.
Last position:
Senior Frontend Developer at HUK24 AG
- Designing new apps as well as enhancing and running 29 Angular apps for digital claims in an Nx monorepo
- Maintaining and improving a shared component library with ~300 libraries for multiple product teams
- Migrating all apps to a new design system including its component library and systematic refactoring
- Developing and maintaining the CI/CD pipelines (Jenkins, Azure DevOps, Terraform, AWS)
- Managing releases independently including branch handling, versioning, PR coordination and production deployment
- Implementing and maintaining tracking (Adobe Analytics)
- Ensuring accessibility according to BFSG/WCAG
- Test-driven development (TDD) with Jest and Cypress
- Code reviews, mentoring and setting up best practices in the team
- Technologies: TypeScript, Angular 16-20, RxJS, NgRx, Nx (Monorepo), npm, HTML, (S)CSS, Storybook, Jest, Cypress, Cucumber, Husky, Node.js, Git, AWS, Azure DevOps (Repos & Pipelines), Jenkins, Terraform, TDD, BFSG, WCAG, Nexus, IntelliJ, Adobe Analytics
Mohsin H.
Last position:
BBM GenAI MiDAS program coordinator for Bosch eBike at Robert Bosch GmbH
The MiDAS program aims to integrate Generative AI across the entire BBM organization. My role is to enable the eBike division to adopt and leverage Generative AI by collaborating closely with the MiDAS team in India.
Management:
- Enable the eBike division to adopt GenAI through tailored solutions.
- Collaborate with the MiDAS team in India to design solutions for Generative AI use cases specific to the eBike division.
- Coordinate with the eBike teams to integrate GenAI systems, tools, plugins, and services provided by the MiDAS team.
- Plan roadmaps with eBike and MiDAS India team Product Managers for the delivery and integration of Generative AI solutions.
Allal K.
Last position:
Java Senior Full Stack Developer at Insurance ÖRAG
- Further development of a policy administration system (contract/claims) for the legal expenses insurer ÖRAG.
- My role: Senior Software Developer.
- The team consists of 12 developers.
- Technologies used: Java 8/21, Java EE, Quarkus, WebLogic, JPA, RabbitMQ, JTA, CI, CD, Jenkins, DB2, Maven, Jenkins, GIT (bitbucket) later GitLab, Junit, Elasticsearch, Mockito, Jira, SonarQube, Scrum, React, Workflow
- Migration and modernization of legacy systems: rewrote C and C++ code in Java to improve maintainability, scalability, and performance. Refactored Python into Java, including optimization and integration into modern architectures.
- Study on the use of AI (Codex) for implementing a Java feature. The goal is to compare the time spent and productivity of AI-supported development with a classic implementation by a developer. The results should show how strongly the use of AI affects development time and efficiency.
- Development of the following tariff calculators for the years 2024/2026: private, companies, doctors, farmers, owner-occupied G + H, landlords, traffic, club, top managers, sales representatives, special criminal law, savings bank, municipal, BayGT, doctors, Dehoga
Mani Y.
Last position:
Full-Stack Developer at Continentale Krankenversicherung a. G.
- Set up the new digitization strategy.
- Using Camunda as a process engine, a new way of handling batch and dialog tasks is created.
- In close cooperation with the business department, the individual processes are created and put into production.
- Forms for controlling manual interventions, e.g. when adjusting applications, are implemented.
- Gradual migration of old code from IBM WebSphere to JBoss.
- Skills: Arquillian, Camunda, Initiative, Empathy, Hibernate, Jackson, Java/JEE, JBoss, Jersey, JSON, JUnit, Openness to criticism, Willingness to learn, REST, Teamwork, WebServices.
Eduard H.
Last position:
Senior Java Developer at Deutsche Bahn
- Implemented asynchronous communication with Kafka Streams to update user and group data in microservices
- Conducted load and performance tests with JMeter to ensure system stability
- Migrated microservices to current versions of Spring Boot libraries for better maintainability and security
- Optimized Hibernate queries to improve database efficiency
- Deployed new microservices on AWS infrastructure using Kubernetes for scalability and fault tolerance
- Created OpenSearch dashboards to monitor and analyze system metrics
- Integrated Azure Entra user accounts via SCIM by implementing all necessary REST endpoints
- Improved response times through asynchronous processing in separate threads for better performance
- Enhanced Android device logging capabilities for easier troubleshooting
- Refactored database schema with Flyway for consistent and traceable migrations
- Updated AWS Cognito user settings to optimize user management
- Offloaded resource-intensive tasks from the main microservice into separate Docker containers to boost performance
- Used technologies: Java, JavaScript, Kotlin, Angular, Maven, Spring Boot, Spring Security, JUnit, Tomcat, Spring Data, Spring Cloud, Hibernate, Jackson, microservices, Docker, Kubernetes, OpenSearch, Grafana, OpenAPI, SonarQube, PostgreSQL, MySQL, JMeter, Kafka, Flyway, AWS, Azure, Jira, Confluence, Agile, Scrum, SAFe
Faruk S.
Last position:
Software Developer at HR Solutions GmbH
- Designing and developing a web application for the public sector
- Setting up and executing software tests, mainly unit tests
- Technical design and implementation of requirements
- Uploading and displaying CSV files
- Communicating with business units regarding development and test support
- Technologies used: Java, Spring Boot, Spring Security, Spring Batch, Spring Cloud, Spring Data JPA and Hibernate, RESTful, JSON, React, Oracle, JUnit, Mockito, CI/CD, GitLab, Docker, Keycloak, Liquibase, BIRT, Swagger, Microservices
Rolf M.
Last position:
Lead Developer and Reviewer of Specialized Applications for the 2021 Census Project at Federal Statistical Office
- Kubernetes, AWS Cloud, Docker, RESTful Services, ActiveMQ, Oracle Advanced Queuing, JBoss EAP, Spring Batch, Git, Keycloak, Kafka, Maven
- Set up CI/CD pipelines with Jenkins
- Developed automated integration tests
- Performed DevOps tasks
- Regularly performed static code analyses during development on all releases of the Census specialized applications using SonarQube
- Set up an R server for household generation
- Set up a Kafka server for the CVTS application
- Set up a Keycloak instance
- Set up a Jira instance to carry out the Jira migration
- Set up an IRI Workbench instance and Cosort for test data creation
- Set up test systems for Java web applications with JBoss8, JDK17 and Oracle and MySQL databases
- Set up the associated Oracle databases, including functionally relevant data
- Identified weaknesses in the technical communication between the specialized applications
- Built extensive business and technical knowledge of all Census specialized applications
- Supported and advised the departments on Census business processes in pre-production and production
- Performed load and performance tests with JMeter and Bash scripting
Dmitry V.
Last position:
Fullstack Software Developer at Mercedes-Benz Tech Innovation
- Backend development of the cloud-based microservice
- Frontend development of the microfrontend
- Migration of the cloud backend environment
- Rollout of the distributed high-availability Privacy Data Service
- Technologies: Java, Kotlin, Spring Boot, REST Services, Kubernetes, Microsoft Azure, Cloud Security, OpenAPI, Postman, JavaScript, Vue.js, AngularJS, TypeScript, Micro Frontend, Redis, Kibana, Grafana, CI/CD, GitHub Actions, Jenkins, Helm Charts, Sec-Hub, Black Duck, Docker, Maven, Git, Scrum
Mario E.
Last position:
Developer and Consultant at Freelancer
Discover over 15,000 top freelancers
Statistics of experts using Jersey
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2.3 years
Positions per freelancer
15
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Insurance, Transportation
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
90%
Master's degree or higher
60%
Doctorate
10%
Certifications per freelancer
1
Most common languages
German, English, French
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 Jersey
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.
Jersey 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 (92%)
- Insurance (58%)
- Transportation (58%)
- Media and Entertainment (50%)
- Retail (50%)
- Banking and Finance (42%)
- Automotive (33%)
- Education (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Jersey is
Jersey is an open-source framework for building RESTful web services in Java. It is the reference implementation of JAX-RS and provides annotations, request routing, content negotiation, filters and exception handling. Teams use it to expose business capabilities through maintainable HTTP APIs.
Where it fits
Jersey commonly runs in Jakarta EE application servers, servlet containers and standalone Java services. It supports JSON and XML representations, dependency injection, validation, security integration and asynchronous request handling. It is often selected for internal APIs, partner integrations and service layers behind web or mobile applications.
Ecosystem and tooling
- JAX-RS annotations for resources, parameters and HTTP methods
- JSON-B, Jackson or JAXB for request and response formats
- Servlet containers, Grizzly and Jakarta EE runtimes
- Maven or Gradle builds with automated tests
- OpenAPI documentation and REST client integration
Jersey specialists also work with Java, HTTP, OAuth2, Docker, relational databases and observability tools. The right combination depends on the runtime, API contract and deployment model.
When companies hire specialists
- Creating a new REST API around existing Java services
- Modernising JAX-RS or legacy GlassFish Jersey applications
- Separating a monolith into independently deployable services
- Improving validation, error responses, security or performance
- Adding tests, API documentation and deployment automation
Freelance expertise is useful when delivery has a fixed deadline, internal Java capacity is limited, or an API must meet demanding integration requirements. In Germany, remote collaboration is common, while regulated or complex enterprise work may require occasional on-site sessions and strong English or German communication.
What strong professionals deliver
Strong Jersey professionals start with clear resource boundaries and consistent API contracts. They understand HTTP semantics, status codes, idempotency, pagination and versioning instead of treating Jersey as only an annotation library. They also keep business logic separate from resource classes and make failure behaviour explicit.
Quality shows in focused tests, secure configuration, useful logs and reproducible builds. Experienced specialists can explain why they choose a Jersey feature, a JSON provider or a different Java framework, then document the trade-offs for the team that will maintain the service.
Jersey compared with alternatives
Jersey is a strong choice when a project needs standard JAX-RS behaviour and a broad Java ecosystem. RESTEasy offers another established JAX-RS implementation, while Spring Web MVC and Spring WebFlux provide deeper integration with Spring applications. Quarkus and Micronaut may be preferable when fast startup and cloud-native resource usage are central concerns.
The best option depends on the existing runtime, team skills, deployment constraints and compatibility requirements. A capable specialist can assess the current system before recommending migration, extension or a different framework.
Frequently asked questions
Curious about Jersey? Here are the answers that come up again and again.
Jersey is used to create RESTful web services in Java through the JAX-RS standard. Companies use it for internal APIs, public integrations, service-to-service communication and backends for web or mobile applications.
Jersey and RESTEasy are both established JAX-RS implementations. The choice usually depends on the application server, Jakarta EE compatibility, existing libraries, support requirements and the team’s familiarity with each ecosystem.
A Jersey specialist can integrate Jersey with a Spring application, although Spring MVC or Spring WebFlux may provide more native integration. Jersey makes sense when the project already relies on JAX-RS contracts or needs compatibility with an existing REST service layer.
A strong Jersey freelancer should understand Java, HTTP, JSON serialization, dependency injection, API security and automated testing. Experience with Maven or Gradle, Docker, OpenAPI and application monitoring is also valuable for production delivery.
The required Jersey experience depends on the scope and risk of the service. A small endpoint extension may need focused API knowledge, while a migration or enterprise integration calls for broader understanding of runtime configuration, security, testing and deployment.
Yes, Jersey work is well suited to remote collaboration because API contracts, code reviews and tests can be shared online. Teams in Germany should clarify availability for overlapping hours, documentation standards and whether English or German is needed for workshops and stakeholder communication.
Review how a Jersey specialist handles API design, validation, error responses, security and test coverage. Ask for examples of clear resource boundaries, documented contracts and maintainable integration code rather than judging only by the number of endpoints delivered.
Jersey is often a better fit when the project follows JAX-RS standards or already runs in a Jakarta EE environment. Spring WebFlux is more suitable when reactive programming and deep Spring integration are core requirements, so the decision should follow the runtime and delivery goals.
The average hourly rate of freelancers in Germany who have used Jersey in their recent projects is 101 €, which corresponds to a daily rate of about 810 € based on an 8-hour working day.
Of the freelancers in Germany who have used Jersey in their recent projects, 90% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Germany who have used Jersey in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Germany who have used Jersey in their recent projects are German (100%), English (92%), and French (17%).
The most common industries among freelancers in Germany who have used Jersey in their recent projects are Information Technology (92%), Insurance (58%), and Transportation (58%).
The most common business areas among freelancers in Germany who have used Jersey in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used Jersey
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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
