Java Experts in Hanover
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Meet FRATCH Experts in Hanover, who have recently used Java
Priyanka Sarang
Last position:
Business Consultant (Software Engineering) at Boehringer Ingelheim
- Developed cloud-native enterprise applications on SAP Business Technology Platform using Node.js, SAP UI5, and RESTful APIs, delivering solutions across training management, procurement, employee information, and logistics domains
- Served as the primary developer for the maintenance, enhancement, and production support of three enterprise applications, delivering new features, resolving production issues, and coordinating releases with business stakeholders
- Experienced in leveraging AI-assisted development tools such as Microsoft Copilot to accelerate feature development, generate code, prototype solutions, and support application migration and modernization
- Designed backend services, domain models, and SAP Fiori/UI5 interfaces, implementing business workflows, role-based access control, validations, scheduling, reporting, and data import/export capabilities
- Designed and integrated enterprise services with SAP SuccessFactors, SailPoint, ERP systems, and external Learning Management APIs, including automated synchronization for 11,000+ user data
- Designed and implemented AMQP-based event-driven services processing up to 500 RFID parcel scan events per day for a logistics application
- Managed deployments and application operations using CI/CD pipelines, SAP Solution Manager, SAP BTP Cockpit, Kibana, and cloud monitoring tools, performing root-cause analysis and resolving production incidents
- Managed application dependencies by resolving npm package version conflicts and remediating critical and high-severity security vulnerabilities, ensuring production compliance and application stability
- Collaborated with architects, business users, SAP governance teams, and distributed Agile teams throughout technical design, code reviews, sprint planning, documentation, and software delivery
Olfa Azzabi
Last position:
Senior Embedded Software Engineer / Function Developer at Enginius GmbH (FAUN GROUP)
- Developed model-based software for hydrogen tank control units using MATLAB/Simulink, aligned with ISO 26262 functional safety requirements
- Performed system integration and software verification across MIL and HIL environments using dSPACE and Vector tools
- Defined software architecture (SADS) with interface specifications for CAN, analog, and digital communication protocols
- Generated production-ready embedded C code using Simulink Embedded Coder; created and maintained A2L calibration files with CANape
- Designed and executed MIL/HIL test cases ensuring full coverage of functional and safety requirements
- Implemented CODESYS PLC applications on IFM ecomatController; applied CAN and Modbus TCP/IP communication protocols
- Contributed to HMI/UI development using Qt/C++ on Linux (Qt Creator)
- Applied agile Kanban workflow with Git-based version control (Bitbucket)
Tools: MATLAB, Simulink, CANape, CANalyzer, PCAN-View, Embedded Coder, CODESYS, TTC2038/PXROS, Codebeamer, Jira, Git
Dennis Schuchardt
Last position:
Lead Full Stack at Self-employed
- Billing software for the second-highest security authority of the Federal Republic of Germany
- Passed security clearance level 2
- Frontend and backend development
- Consulting on the introduction, design, implementation, and development of technical components
- Code reviews, component testing, module testing, group module testing
- Implementation of UI/UX design
- Used technologies: HTML, CSS/SCSS, JavaScript, Node.js, Vue 3, PrimeVue, Webpack, Vuex, Momentum, Jest, NPM, Lodash, Java 17, Spring Boot, Lombok, GraphQL, JUnit, Maven, Keycloak, Python, Docker, CI/CD, Kubernetes, Oracle SQL, Postman, Storybook, Microservices, Monorepo, Jira, Confluence, Scrum, GitLab, AWS, IntelliJ, Visual Studio Code, Neovim, XLSX, responsive Webdesign, BITV 2.0 (U.S. Section 508) / WCAG 2.2
Lukas Sontheimer
Last position:
Freelance AI Consultant at Sontheimer Consulting
- Helped 10+ SMEs to take their first steps in AI
- Held over 30 workshops on AI strategy and AI training
- Conducted audits through the identification and evaluation of AI uses
- Developed dedicated AI strategies and roadmaps for transformation
- Implemented AI workflows, AI agents and dedicated AI solutions
- Developed AI product roadmaps
- Delivered interactive trainings on prompting, EU AI Act, benefits and challenges of AI
Bastian Bührig
Last position:
Backend Developer at SupplyOn AG
In this project, I support the software development of various modules of the supply chain management solution. My responsibilities include the technical implementation and optimization of collaborative SCM processes that help companies make their supply chains more efficient, transparent, and resilient. This modular software platform facilitates communication and Collaboration with suppliers is standardized and digitized, enabling seamless traceability of quality data and supplier evaluations. Technically, I focus on development with Go/Golang for scalable backend services and on the use of Kafka for real-time messaging and event processing. I design and extend GraphQL interfaces for efficient data communication between microservices and support automated build and deployment management using Docker and Gitlab CI/CD pipelines. Data is stored in the modules I work on using a PostgreSQL database.
Technical focus: Go/Golang, Kafka, GraphQL, Docker, Gitlab, CI/CD, DevOps, PostgreSQL, JIRA, Miro
Friedhelm Matten
Last position:
Project at Deutsche Gesetzliche Unfallversicherung
- Collaborated on HL7 FHIR profiling and validation
- Created CodableConcepts (code/value systems), extensions and profiles like Composition and Bundle
- Extensive instance creation and validation
- Used Simplifier.net, Forge and the FHIR Java Validator
Martin Zander
Last position:
Consulting, Design and Development at ivv GmbH
- Design, development and maintenance of a web application as a policy management system based on a JEE backend and a Vaadin-based UI
- Design and development of interfaces
- Integration of databases
- Design and development of unit and integration tests
- Conceptual coordination with the client
- Technologies and methods: JEE, Vaadin, EJB, Innovator, Hibernate, REST, JMS, SQL, MQ, Maven, Selenium, Arquillian, Mockito, JUnit, Log4j, OOA, OOD, Scrum, Kanban, JavaScript, HTML, CSS, Jenkins, Jenkins Pipelines, Git, GitLab, Subversion, Jira, Confluence, DB2, WebLogic
Maximilian Mayerhofer
Last position:
Test Data Creation and Management at statutory accident insurance
- Provision of cross-system synthetic test data for test automation for insured persons, companies and external partners in coordination with specialist departments and stakeholders, taking requirements and test cases into account
- Synthesis of test data with regard to data protection and data security
Marwan Blazek
Last position:
Full-Stack Developer, Business Analyst at HDI Deutschland AG
- Backend development with Spring Boot (Java) for health and VH
- Frontend development with Angular (TypeScript) for health and VH
- Implementation of REST services incl. business logic in the backend, development of frontend components
- Building build and deployment pipelines (GitLab CI/CD)
- Business and technical requirements analysis, maintenance of user stories, stakeholder management
- Coordination with IT architecture, UX design (mockups with Balsamiq)
- Creating interface definitions (OpenAPI), Camunda process modeling (BPMN)
- 8 years of consulting for insurance companies: property & liability (private, corporate)
Christian Krah
Last position:
Service Catalog Manager at Deloitte team
- Worked in the IT infrastructure of the Deloitte team.
- Planned assignment as service catalog manager at an insurance company in Hanover.
Janus Thomys
Last position:
Senior Scrum Master, Agile Coach at DMK, Bremen, Germany
- Optimizing agile work using Scrum as the chosen framework
- Coaching teams and individual members to increase collaboration efficiency, improve team effectiveness and performance, and foster a culture of continuous improvement
- Promoting and supporting the use of agile methods with Scrum, including upholding Scrum values and team self-organization
- Preboarding the internal Scrum Master
Yenal Yavuz
Last position:
Shiny R Development at RadixITS Gbr
- Implementation and mapping of regulatory requirements (CSRD, ESRS) in Shiny dashboards and backend functionalities
- Design and development of data-driven modules in Shiny including ESG metrics and reporting templates
- Integration of data sources (SQL, SAP HANA, APIs, CSV/Excel) using DBI, odbc, httr and readr
- Creation of interactive visualizations with plotly, highcharter and DT (DataTables)
Frank Nitze
Last position:
Developer at In-house development of the HAPPYLIST web application
- Fully developed a CRM system for contact management in network marketing
- Enabled configuration of tags, custom reminders, birthday reminders and more
- Application is productive
- Technologies and methods: Trello, Python, Django, Rest-Framework, Bootstrap, PostgreSQL
Jasser Chtourou
Last position:
Artificial Intelligence Intern at Plug&Plai
- Supported the development of AI-powered voice assistants for recruitment automation.
- Helped optimize speech recognition models and conversational AI workflows.
Discover over 15,000 top freelancers
Statistics of experts using Java
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
1.6 years (Germany: 2.9 years)
Positions per freelancer
13
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
92% (Germany: 91%)
Master's degree or higher
50% (Germany: 55%)
Doctorate
17% (Germany: 7%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
93% (Germany: 97%)
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 Hanover 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 Hanover using Java
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
Core Java
Java is the base language for a wide range of backend systems, internal tools, and business services. Strong experts write clear, maintainable code in modern Java, not just legacy classes. They handle object design, collections, concurrency, and the kind of business logic that needs to stay stable over time.
Spring ecosystem
Most company projects use Java with Spring Boot, Spring MVC, Spring Data, or Spring Security. That mix is common for REST APIs, service layers, authentication, and database access.
- Spring Boot service development
- REST and JSON API design
- Security, login, and access control
- JPA, Hibernate, and data mapping
Typical projects
Java specialists are often brought in for platform work that must run reliably and integrate with many systems. They build customer portals, order flows, invoicing services, workflow engines, and message-driven services. In Hanover, that often matters for industrial software, logistics, and enterprise back offices where stable interfaces and clean handovers are important.
When to hire
Companies call in freelance Java expertise when a product team is overloaded, a legacy system needs careful change, or a new service must fit an existing Java stack. They also use outside help for refactoring, production incidents, test coverage, or migrations to newer Java releases. If you need someone who can join quickly and work independently, Java specialists are a good fit.
What good specialists do
A strong Java professional writes code that is easy to review, test, and maintain. They understand JVM behavior, thread safety, dependency management, and build tools like Maven or Gradle. Good specialists also document decisions clearly, because Java work often lives inside larger systems with many moving parts.
Team fit
Java work usually sits close to product owners, backend specialists, QA, and operations teams. In Hanover, on-site workshops can help with legacy systems and shared infrastructure, while remote delivery works well for API work and planned refactoring. The best freelancers communicate clearly in English and adapt fast to the team’s code style and release process.
Frequently asked questions
Everything clients usually want to know about Java, in one place.
Java is widely used for backend services, APIs, integration layers, batch processing, and internal business applications. It is also common in large systems that need stability, structured code, and long-term maintainability. Many teams pair it with Spring Boot when they want a productive server-side stack.
Java is often chosen when a team wants a mature ecosystem, strong library support, and a large base of existing code. Kotlin is a close alternative on the JVM, while C# is common in Microsoft-centered environments and Go is often used for lean services. The best choice depends on the current stack, team skills, and long-term maintenance needs.
A strong Java specialist usually brings Spring Boot, testing, SQL, Git, and build tools such as Maven or Gradle. For many projects, knowledge of JPA, Hibernate, messaging systems, and security is also important. If the work touches production systems, monitoring and debugging skills matter as well.
For a small API or a contained feature, a focused Java expert may be enough. For legacy systems, security-sensitive work, or large platform changes, you want someone who has handled similar complexity before. The real question is not just language knowledge, but whether the freelancer has shipped the same kind of system.
Yes, Java remains a strong choice for new backend services, especially when you want a proven ecosystem and clear maintainability. Spring Boot makes it practical for modern service development, and newer language releases have improved the developer experience a lot. It is a solid fit when reliability matters more than novelty.
Yes, many Java specialists can work fully remote if the project has clear tickets, access, and review routines. For Hanover-based teams, a hybrid setup can help during onboarding, architecture workshops, or work on shared systems. Remote delivery is usually fine for API work, testing, and refactoring.
Look for clean code, strong tests, and a clear way of explaining trade-offs. A good Java freelancer can talk about concurrency, dependencies, performance, and how they keep a system maintainable. Ask for examples of similar work, especially if the project involves Spring Boot, legacy code, or production support.
Java is common in enterprise software, logistics, manufacturing, and internal business systems, which are all familiar contexts around Hanover. That often means APIs, workflow services, integration with older systems, and careful support for existing processes. Local or remote collaboration both work, as long as the specialist can fit into the team’s delivery rhythm.
The average hourly rate of freelancers in Hanover, Germany who have used Java in their recent projects is 93 €, which corresponds to a daily rate of about 740 € based on an 8-hour working day.
Of the freelancers in Hanover, Germany who have used Java in their recent projects, 92% hold at least a Bachelor's degree, 50% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Hanover, Germany who have used Java in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 1.6 years.
The most common languages among freelancers in Hanover, Germany who have used Java in their recent projects are German (100%), English (93%), and French (21%).
The most common industries among freelancers in Hanover, Germany who have used Java in their recent projects are Information Technology (93%), Banking and Finance (64%), and Insurance (57%).
The most common business areas among freelancers in Hanover, Germany who have used Java in their recent projects are Information Technology (100%), Product Development (86%), and Quality Assurance (71%).
Main locations of FRATCH Experts, who have recently used Java
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 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
