JNI Experts in Germany
in minutes with vetted freelancers and precise AI matchingHire experts who bridge Java and native code, build C and C++ integrations, and fix low-level performance or compatibility issues, with fast, precise matching from vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used JNI
Ola Van Dunen
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Anton Lorani
Last position:
Freelance Software Developer at Anton Lorani Software&AI Engineering
Shaffi Shaik
Last position:
Software Architect at Volkswagen AG
- Designed architecture for new service components Fleet Data Management and other remote services.
- Created UML, SAD, SDS, and ADR documentation capturing design decisions, traceability, and variant handling.
- Ensured ASPICE SWE.1/SWE.2 compliance through architecture governance and consistent work-product alignment.
- Participated in architecture reviews, interface definitions, effort estimations, and technical alignment discussions.
- Collaborated with cybersecurity, backend, and compliance teams to ensure alignment with ISO 21434 and ASPICE standards.
Georg Danebrock
Last position:
Senior Project Manager at Apleona GmbH
- Project review, restructuring, and PM for the migration of a total of 12,000 Windows workplace systems (650 applications) from SCCM and Empirum/Matrix42 to MS-Intune after a merger.
- Took over a heavily delayed / not ideally managed project in the role of the "firefighter".
- Completely revised and adjusted/updated the planning of the customer and the involved service provider.
- Introduced planning baselining as well as tracking/mitigation of current risks.
- Introduced an efficient, partially automated planning/reporting interface between MS Project Planning (service provider) and Jira (customer).
- Restructured meetings to increase efficiency and remove redundant appointments.
- Completed the analysis and design phase and created base data for migrations from heterogeneous systems of the two merged companies.
- Started the User Acceptance Test (UAT).
- Technologies: MS Autopilot, Zero Touch.
Bernd Gasse
Last position:
Freelance Embedded and Software Engineer at Hardware-Software-Design
Specialized in embedded software development with C, C++, assembly, and designing interfaces to other applications or components
Focus areas: communication (wireless and wired), control/regulation, low-power RF applications (e.g., Bluetooth LE), IoT applications, systems for measurement/data acquisition
Development of cross-platform communication protocols based on Bluetooth Low Energy for embedded systems, embedded Linux, and mobile applications
Mobile/desktop software development with C/C++, QML, and the Qt framework; platform-specific interfaces in Java/Kotlin for Android and Objective-C/Swift for iOS
Platforms: Linux, Android OS, iOS, Windows/UWP, embedded Linux, macOS; cross-platform with Qt 6, QtQuick/QML
Multithreaded applications, UI/UX design with QtQML; experience with VxWorks and QNX
Consulting and requirements analysis from concept through design, prototyping, testing to production transfer
Expertise in desktop, mobile, and backend software, cross-platform development, embedded software, digital and mixed-signal applications, wireless modules (Bluetooth LE, WiFi), short-range device certification, Bluetooth listing
Hardware development: concept and design of electronic circuits, schematic creation (OrCAD, Fusion360), simulation (PSpice, LTSpice), layout, prototype assembly, and commissioning
Extensive project experience in PC/desktop/server software, embedded software, mobile applications, and hardware development projects (selected from 2008 to 2025)
Hans Leidecker
Last position:
Public administration
- Development of web services for processing vehicle registrations (registration, transfer, deregistration)
- Implemented with Spring Boot, JMS (ActiveMQ), Oracle, Tomcat/JBoss, TomEE, OpenSearch
Discover over 15,000 top freelancers
Statistics of experts using JNI
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
5.8 years
Positions per freelancer
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, Project Management
Certifications per freelancer
4
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 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 JNI
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
JNI at a glance
JNI, the Java Native Interface, lets Java code call native libraries and lets native code call back into the JVM. Companies use it when standard Java APIs are not enough and they need direct access to system features, legacy code, or hardware-specific SDKs.
Typical use cases
- Connect Java services to C or C++ libraries
- Wrap vendor SDKs for devices, security tools, or media stacks
- Keep legacy native code in use while modernizing Java applications
- Expose performance-critical routines to the JVM
Ecosystem and tooling
Strong JNI work depends on more than Java. It usually involves C or C++, build tools such as Maven or Gradle on the Java side, and native build systems like CMake or Make on the other side. Good specialists also understand the JVM, shared libraries, symbol loading, and platform differences across Linux, Windows, and macOS.
Why companies bring in specialists
JNI problems often appear late: crashes, memory leaks, loading errors, or subtle type mismatches between Java and native code. Freelance expertise is useful when a team needs to ship an integration fast, stabilize an existing bridge, or review code that mixes managed and unmanaged memory.
What strong professionals deliver
Strong JNI professionals write clean interfaces, keep the native boundary small, and make error handling explicit. They know how to trace crashes, manage object lifetimes, and tune build and deployment steps so Java and native artifacts stay aligned.
Germany collaboration
In Germany, JNI work often sits in enterprise software, industrial systems, embedded products, and tooling with strict stability needs. Many projects can be done remotely, but on-site collaboration helps when access to hardware, secure environments, or platform-specific test setups is required.
Frequently asked questions
Need clarity? These are the questions we hear most often about JNI.
JNI is used when Java must talk to native code directly. That usually means calling C or C++ libraries, reaching hardware SDKs, or reusing older native components inside a Java application.
A company chooses Java Native Interface when Java alone cannot reach a required library, device, or OS feature. It is also common when performance, compatibility, or legacy investment makes native integration the practical path.
JNI is lower level and gives more control, but it also requires more care with types, memory, and build setup. JNA is often easier for simple integrations, while JNI is usually better when a team needs tighter control, better performance, or access to more complex native APIs.
A strong JNI specialist usually knows Java well and can work in C or C++. Familiarity with the JVM, shared libraries, debugging tools, and build systems like Maven, Gradle, and CMake helps a lot.
A small wrapper around an existing library may need only one focused specialist. A production system with multiple native modules, platform-specific behavior, or crash issues usually needs someone who has shipped and debugged JNI code before.
Yes, most JNI work can be done remotely if the specialist has the right source code, build access, and test setup. On-site work can be helpful when the project depends on special hardware, closed environments, or hands-on debugging of native crashes.
Frequent JVM crashes, load failures, memory leaks, or inconsistent behavior across operating systems are common warning signs. A JNI review should also check that native lifetimes, exception handling, and thread interaction are handled safely.
Look for clear examples of mixed Java and native work, not just general Java experience. A strong JNI freelancer can explain how they reduced the native boundary, handled ownership and cleanup, and tested the integration across target platforms.
The average hourly rate of freelancers in Germany who have used JNI in their recent projects is 98 €, which corresponds to a daily rate of about 783 € based on an 8-hour working day.
On average, freelancers in Germany who have used JNI in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 5.8 years.
The most common languages among freelancers in Germany who have used JNI in their recent projects are German (100%), English (100%), and French (33%).
The most common industries among freelancers in Germany who have used JNI in their recent projects are Information Technology (100%), Banking and Finance (67%), and Insurance (67%).
The most common business areas among freelancers in Germany who have used JNI in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (83%).
Main locations of FRATCH Experts, who have recently used JNI
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
