JBuilder Experts in Germany
to modernize Java applications with fast, precise AI matchingHire experts who maintain JBuilder codebases, support Java desktop applications and connect legacy enterprise systems with current toolchains. FRATCH matches you quickly with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Germany, who have recently used JBuilder
Hans-Dieter G.
Last position:
Training as an AI Expert
I continuously expand my expertise in AI and automation. I work with ChatGPT, OpenAI, Manus, Gemini, MS CoPilot, APIs, LangChain, Hugging Face, Manus, TensorFlow, and Auto-GPT, as well as Python-based ML frameworks and MLOps tools, to intelligently transform traditional software development, analysis, and testing processes.
Olaf T.
Last position:
BI Architect in a Kanban Team at Gulp / Randstad for HHLA
- Creation of automated tests.
- Extension of the functionality of the enterprise BI data warehouse.
- Design and development in SQL and PL/SQL.
- Data modeling as well as performance measurement and tuning.
- Creation of and contribution to user stories and concepts.
- Technical environment: Windows, Linux.
- Database: Oracle 19c incl. DWH, CDB, PDB.
- Tools: Confluence, CVS, Eclipse, Git, GitLab, Jira, N4, PL/SQL, SQL Developer, utPLSQL.
Ola V.
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
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
Stefan M.
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Igor K.
Last position:
Freelance Software Developer
Werner K.
Last position:
Test Coordinator, Designer and Engineer at IBM
- Testing the SekIDP and related components
- Test design, execution and automation, microservices, GitHub Enterprise, Eclipse, Katalon Test Platform, API Testing, Confluence 8, JIRA/Xray, Draw.io, Swagger/OpenAPI, Postman, Docker, Kubernetes, Podman, PuTTY, E-Health, Telematik, Gematik standards, EPA, E-Rezept, sektoraler IDP, encryption, XaDES, PaDES, DICOM, HL7, FHIR, IHE, ICD, SSO, SAML/Shibboleth, OAuth, smartcards, JWT, two factor authentication Android and iOS, Wireshark, BrowserStack, Cypress, gRPC, REST, SOAP, WS-Security, Linux Shell, PowerShell, SSH/SSL, Java, Kotlin, Cordova, Gradle, Groovy, Python, TypeScript
Karsten K.
Last position:
IT Consultant at Freelance IT Consultant
EvoBus / Daimler Buses (Spare parts)
- Support existing pricing platform
- Further development of existing pricing platform
- Refactoring the central pricing logic
Motorservice International (MSI) (Spare parts)
- Support existing pricing platform
- Further development of existing pricing platform
MAHLE (Spare parts)
- Further development of existing pricing platform
MANN & HUMMEL (Spare parts)
- Support existing pricing platform
HELLWEG Building & Garden Centers (Full assortment) Central pricing setup
- Analysis and documentation of pricing rules
- Setup of pricing for stores & online
- Software architect
- Lead developer of pricing logic (Groovy)
- Support pricing platform
- Further development of pricing platform
PORSCHE AG (Spare parts & accessories) Pricing setup for headquarters and subsidiaries
- Analysis and documentation
- Setup of pricing for headquarters and stores
- Software architect
- Lead developer of pricing logic (Groovy)
- Support pricing platform
- Further development of pricing platform
Achille C.
Last position:
Backend/Frontend Developer at ITZ-Bund
Development of a microservice application for calculating postings on accounts
Development of backend components with Java or JEE, Quarkus, Kafka, Rest API
Development of the test component with mocking frameworks (Mockito)
Development of integration test components
Creation of OpenAPI specification format
Configuration of CI/CD pipeline
Development of frontend components with React
Design, further development and optimization of system structures
Code review
Java Corretto 21, JEE, Quarkus, Golang
Reactive programming with Spring WebFlux, Project Reactor
Git, Azure DevOps for CI/CD pipeline, YAML, Json Swagger UI, Postman, Rest OpenAPI, Kafka Streams, Kafka Connect, Log4J
Microservices, Jira, Confluence, MySQL, Docker, Kubernetes (deployment via Helm charts)
Spring Security, OAuth 2, JWT, Sonarqube
IntelliJ, Maven, logging framework Splunk, Agile method Scrum, Nexus, Vaadin V24, build tool Vite
React, React.JS, Node.js, Jess/JavaScript, Tailwind CSS, Agile method Scrum, accessibility BITV, Playwright
Rahul J.
Last position:
Hybris Consultant at Bosch Digital
- Implement Hybris Commerce projects for customer.
- Provide technical implementation of Developer and Integrator portal using Hybris solution.
- Integration with Billing and Payment systems.
- Technical ownership of the solution.
- Introduce best practices in Hybris solution and Java technologies.
- Provide release support on AWS environments.
- Technical focal point for sales and engineering teams.
- Supporting engineering team to scope the requirements and in architecting & designing the solutions.
- Proliferate best practices from one project to others, Knowledge management.
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
Gerhard H.
Last position:
Application Developer at Lila Logistik
- Supported the application
- Developed applications in COBOL
- Extended customer and in-house requirements
- Assisted in ensuring smooth operation
- Methods/tools: COBOL, HP3000, MPE/XL operating system, IMAGE database, Whisper (development interface)
Reinhard D.
Last position:
Continuing Education Data Analytics, Artificial Intelligence, Deep Learning, Machine Learning at Continuing Education
- Continuing education in Data Analytics, Artificial Intelligence, Deep Learning and Machine Learning
- Operating system: Windows
- Development environments: JetBrains PyCharm, Jupyter Notebook, Spyder
- Programming languages: Python 3.10
- Other technologies: Anaconda, Keras 2.10, NumPy, OpenCV, Pandas, Scikit-learn, Seaborn, TensorFlow 2.10, PyTorch
Roman P.
Last position:
IT manager, specialist and consultant; robotics specialist; business analyst; actuary at Righley Cooper GmbH
- IT manager, specialist and consultant
- Robotics specialist
- Business analyst
- Actuary
Ioan D.
Last position:
Senior Software Developer at ING
- Tribe Home, Product Area 4 - Customer in Life, Squad Cybertron.
- Analysis, design, development, and testing of new requirements for Optimmo, mortgage financing software.
- Analysis, design, development, and testing of the JEE application MWS kredit-baufi.
- Analysis, design, development, and testing of the Wicket Optimmo application.
- Analysis, design, development, and testing of kredit-baufi batch programs.
- Migration of kredit-baufi batches to RHEL9.
- CiL SCS consumer pacts with Finagle.
- CiL SCS touch point architecture integration.
- Team size: 10.
- Tools / Frameworks: OpenJDK Java 17, Kotlin 1.6.0, Azure, Jenkins, Stash, JEE, GitLab, JIRA, Confluence, git, Spring 6.0, Spring Cloud, Spring Data, Hibernate, JPA, JMS, Kafka, Oracle, PL/SQL, Red Hat Enterprise Linux (RHEL), Maven, REST, JBoss, IntelliJ IDEA, Wicket 9 and 10, Istio.
Discover over 15,000 top freelancers
Statistics of experts using JBuilder
Aggregated from the professional profiles of matched freelancers.
Experience
28 years
Position duration
2.5 years
Positions per freelancer
24
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Quality Assurance, Product Development
Bachelor's degree or higher
59%
Master's degree or higher
53%
Doctorate
12%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
96%
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 JBuilder
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.
JBuilder 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 (70%)
- Automotive (61%)
- Insurance (57%)
- Retail (57%)
- Transportation (52%)
- Telecommunication (52%)
- Healthcare (48%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
JBuilder in practice
JBuilder is Borland’s Java integrated development environment, later associated with the Inprise brand. It was designed for building, testing and maintaining Java applications through visual project management, source editing, debugging and deployment support. Many companies still rely on it for long-lived enterprise or desktop systems whose original toolchain remains part of daily operations.
Typical applications
JBuilder appears most often in established Java environments rather than new greenfield projects. Companies bring in specialists to maintain business software, update integrations and document code that has outlasted its original team.
- Maintain Swing and other Java desktop applications
- Support EJB and J2EE enterprise systems
- Repair build, deployment and dependency issues
- Connect legacy applications with current services
- Prepare controlled migrations to newer Java tooling
Ecosystem and tooling
Work around JBuilder can involve Java, Ant or similar build processes, application servers, relational databases and source control systems. Strong specialists understand the surrounding environment as well as the IDE itself, including older JDK compatibility, enterprise configuration, debugging workflows and deployment conventions. They can also interpret generated project files and vendor-specific settings without disrupting production systems.
When companies need help
Freelance expertise is useful when a JBuilder system has become difficult to maintain, when internal knowledge has left the business or when a migration must be planned without interrupting operations. German companies may need specialists who can work remotely across teams or join on-site sessions for access, handover and workshops. Clear technical documentation and German or English communication can both matter, depending on the project.
- Stabilize an inherited JBuilder application
- Investigate recurring runtime or build failures
- Assess migration risks and sequencing
- Transfer knowledge to an internal team
Skills that distinguish specialists
Effective JBuilder specialists read legacy Java code carefully before changing it. They know how IDE metadata, generated files, classpaths and application-server settings interact, and they can separate a JBuilder issue from a deeper Java or infrastructure problem. They also test changes against the original runtime assumptions and leave practical documentation for future maintenance.
Selecting the right expert
Ask for examples of comparable Java systems, especially applications using Swing, EJB, J2EE or older application servers. Discuss the exact JBuilder release, Java compatibility, build process, deployment target and source-control setup before work begins. A strong professional explains technical risk in plain language, proposes a safe first step and can support either continued maintenance or a phased move to a current IDE such as IntelliJ IDEA or Eclipse.
Frequently asked questions
Questions about JBuilder? Start with the answers below.
JBuilder is mainly used to maintain established Java applications, including Swing desktop software and older J2EE or EJB systems. It can also support debugging, project configuration and controlled changes while a company plans a migration to a current Java toolchain.
JBuilder was built around older Java development and enterprise workflows, while IntelliJ IDEA and Eclipse provide broader support for current Java versions, plugins and frameworks. The right choice depends on whether the priority is preserving an existing system safely or moving it to a modern development environment.
A strong JBuilder specialist should understand Java, Ant or comparable build tools, source control, relational databases and application-server configuration. Experience with Swing, EJB, J2EE, XML and legacy deployment processes is valuable when the IDE is part of a larger enterprise system.
The required background depends on the system’s age, size and operational risk. For a simple maintenance task, practical Java knowledge may be enough, but migration planning or production recovery calls for a JBuilder professional who has worked with legacy project metadata, older runtimes and enterprise deployments.
Yes, many JBuilder tasks can be completed remotely when the specialist has secure access to source code, build environments, test systems and documentation. On-site collaboration can still help with restricted infrastructure, stakeholder workshops or knowledge transfer, and teams should agree on German or English communication at the start.
Ask the specialist to explain a comparable legacy Java system, its runtime constraints and the checks used before deployment. A capable JBuilder professional distinguishes IDE configuration problems from application defects, documents assumptions and proposes reversible changes before attempting a broad rewrite.
Migration is worth considering when the current runtime, libraries or development environment prevent security updates, reliable builds or access to needed skills. JBuilder may still be the safest short-term environment for stabilization, so a careful assessment should map dependencies and business risks before selecting IntelliJ IDEA, Eclipse or another replacement.
Describe the application type, JBuilder release, Java runtime, build method, application server, database connections and deployment process. Include known incidents, access restrictions and the desired outcome so a JBuilder specialist can judge whether the work involves maintenance, recovery, documentation or migration.
The average hourly rate of freelancers in Germany who have used JBuilder in their recent projects is 91 €, which corresponds to a daily rate of about 729 € based on an 8-hour working day.
Of the freelancers in Germany who have used JBuilder in their recent projects, 59% hold at least a Bachelor's degree, 53% hold at least a Master's degree, and 12% hold a doctorate.
On average, freelancers in Germany who have used JBuilder in their recent projects have 28 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Germany who have used JBuilder in their recent projects are German (100%), English (96%), and French (17%).
The most common industries among freelancers in Germany who have used JBuilder in their recent projects are Information Technology (100%), Banking and Finance (70%), and Automotive (61%).
The most common business areas among freelancers in Germany who have used JBuilder in their recent projects are Information Technology (100%), Product Development (87%), and Quality Assurance (87%).
Main locations of FRATCH Experts, who have recently used JBuilder
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
