Jakarta Faces (JSF) Experts in Cologne
matched in minutesHire experts who create server-side Java web interfaces, reusable Facelets views and component-based applications with Jakarta EE, CDI and PrimeFaces. FRATCH connects you quickly with vetted, available freelancers whose skills match your project precisely.
Meet FRATCH Experts in Cologne, who have recently used Jakarta Faces (JSF)
Andreas B.
Last position:
Senior Software Developer at ELIONOVA AG
- Created an application to control measurement hardware with a Tauri application using React.JS and TypeScript on Raspberry Pi
- Developed a cloud application for storing and analyzing measurement results using Spring Boot and React.JS
- Built a Tauri application for printing ZPL labels on Windows
- Technologies: Java, JavaScript, Tauri, Rust, React.JS, AWS, Kubernetes, Docker, GitLab CI/CD, REST API (JSON), Maven, CI/CD, PostgreSQL
Rainer L.
Last position:
Senior IT Consultant, Senior Software Architect, Senior Software Developer, Senior DevOps Engineer at Techniker Krankenkasse
Automation of the database major / minor releases for the TKeasy project
Concept for database major / minor release automation
Assessment of the current state
Evaluation of Redgate Flyway functionalities
Concept development
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Knowledge: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Hooman B.
Last position:
Fullstack Developer at Möbel Roller GmbH
- Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
- Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
- Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
- Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
- Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
- Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
- Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
- Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
- Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
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
Andreas E.
Last position:
Consultant at Iteratec GmbH
Vladimir M.
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
Jacqueline H.
Last position:
Kitchen Appliance Manufacturer
Setting up and enhancing an international subscription management system
Migrating and decommissioning a Hybris-SAP system and integrating Zuora
Implementing numerous interfaces to various systems (external and internal)
Setting up and improving monitoring with Grafana, Prometheus, and Databricks
Introducing logging with Loki
Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python
Adjusting and extending the GitLab CI pipelines
Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS
Setting up and running E2E and performance tests
Expanding the Databricks business intelligence solution to provide various KPIs
Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)
Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks
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 Z.
Last position:
Freelance IT Specialist
IT specialist Application Engineering / Software Development since 2012
Jacqueline K.
Last position:
OTTO
- Design, development, and monitoring of microservices
- Migrating functions from a monolithic system into separate microservices
- Designing and implementing new microservices (backend and frontend)
- Setting up and maintaining a CI/CD pipeline (GitHub Actions)
- Configuring cloud infrastructure with AWS CDK and Terraform
- Designing and implementing event-driven communication with AWS SNS/SQS and Apache Kafka
- Ensuring code quality through Test Driven Development (TDD), static code analysis, and Clean Code
Discover over 15,000 top freelancers
Statistics of experts using Jakarta Faces (JSF)
Aggregated from the professional profiles of matched freelancers.
Experience
26 years (Germany: 22 years)
Position duration
3 years (Germany: 2 years)
Positions per freelancer
12 (Germany: 15)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Information Technology, Product Development, Human Resources
Bachelor's degree or higher
100% (Germany: 86%)
Master's degree or higher
100% (Germany: 50%)
Doctorate
14% (Germany: 5%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100% (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 Cologne 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.
Average rates of experts in Cologne using Jakarta Faces (JSF)
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 Faces (JSF) 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 (90%)
- Banking and Finance (60%)
- Insurance (60%)
- Automotive (50%)
- Transportation (50%)
- Retail (50%)
- Government and Administration (40%)
- Telecommunication (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Purpose and scope
Jakarta Faces, commonly called JSF, is a Jakarta EE specification for building component-based server-side web interfaces in Java. It manages UI state, form submission, validation, conversion and event handling, making it suited to business applications with structured workflows and data-rich screens.
Views and components
Experts work with Facelets XHTML views, managed beans or CDI-backed beans, navigation rules and reusable composite components. They design forms, tables, dialogs and validation flows that remain maintainable as an application grows. PrimeFaces, OmniFaces and other component libraries often extend the standard view layer.
Jakarta EE ecosystem
Jakarta Faces applications typically connect to services and persistence layers through the wider Jakarta EE ecosystem. Relevant skills include CDI, Jakarta REST, Jakarta Persistence, Bean Validation, transactions and security, along with application servers such as Payara, WildFly or Open Liberty. Maven, Git and automated testing support dependable delivery.
Where it fits
Companies use Jakarta Faces for internal portals, administration systems, customer service tools and regulated business applications where server-side rendering and consistent workflows matter.
- Build data-heavy forms and approval processes
- Modernize JSF applications under Jakarta EE
- Integrate views with REST services and databases
- Improve validation, accessibility and usability
When to bring in expertise
Freelance specialists help when a legacy JSF application needs a controlled upgrade, when a team must deliver complex screens quickly or when performance and maintainability have declined. In Cologne, they may support local product, industrial and public-sector teams on site, remotely or in a hybrid setup, with German or English collaboration as required.
Signs of strong professionals
Strong professionals understand both the JSF lifecycle and the business process behind each view. They separate presentation, state and service logic, use CDI and validation consistently, test navigation and component behavior, and inspect browser requests when diagnosing slow or fragile screens. They can also explain when a gradual modernization is safer than a full rewrite.
Frequently asked questions
Quick answers to the questions that come up most around Jakarta Faces (JSF).
Jakarta Faces (JSF) is used to build server-side, component-based web interfaces for Java and Jakarta EE applications. It fits forms, tables, workflows, dashboards and administrative screens that require validation, navigation and managed UI state.
Jakarta Faces (JSF) keeps much of the interface lifecycle on the server and provides reusable UI components out of the box. Spring MVC with a separate frontend, or frameworks such as React and Angular, can offer different levels of frontend control and interaction, so the right choice depends on the existing stack, team skills and product needs.
A strong Jakarta Faces (JSF) specialist should understand CDI, Facelets, Bean Validation, Jakarta Persistence and application security. Experience with PrimeFaces, REST integration, Maven, testing and an application server such as Payara or WildFly is also valuable.
The need depends on the application’s scope and condition. A small feature may need focused Jakarta Faces (JSF) delivery, while a migration, performance investigation or complex workflow benefits from someone who understands the lifecycle, state management, component library and surrounding Jakarta EE services.
Yes. Jakarta Faces (JSF) work is well suited to remote collaboration when the team shares repository access, environments, acceptance criteria and regular review practices. On-site sessions in Cologne can still help with domain discovery, legacy system analysis or close coordination with business teams.
Ask how the person handles view state, validation, navigation, CDI scope and component rendering in a real application. A capable Jakarta Faces (JSF) expert can explain trade-offs clearly, show how they test the UI and identify whether a problem belongs in the view, service or persistence layer.
It can be suitable when the application needs structured server-side forms, strong integration with Jakarta EE and a consistent component model. Jakarta Faces (JSF) is less compelling when the product demands highly interactive frontend behavior or a separate client application is already central to the architecture.
Common risks include changing component-library behavior, breaking view state or navigation, mixing incompatible Jakarta and older Java EE dependencies, and moving business logic into backing beans. An experienced JSF professional reduces these risks with dependency mapping, focused tests, incremental changes and clear rollback points.
The average hourly rate of freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects is 90 €, which corresponds to a daily rate of about 723 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects, 100% hold at least a Bachelor's degree, 100% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 3 years.
The most common languages among freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects are German (100%), English (100%), and French (20%).
The most common industries among freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects are Information Technology (90%), Banking and Finance (60%), and Insurance (60%).
The most common business areas among freelancers in Cologne, Germany who have used Jakarta Faces (JSF) in their recent projects are Information Technology (100%), Product Development (90%), and Quality Assurance (70%).
Main locations of FRATCH Experts, who have recently used Jakarta Faces (JSF)
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 
Frankfurt 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
