Java Experts in Essen
matched in minutes from over 15,000 CVsHire experts who design backend services, Spring Boot applications and scalable APIs with Java. Get precise access to vetted, available freelancers whose skills fit your delivery goals, technical environment and collaboration model.
Meet FRATCH Experts in Essen, who have recently used Java
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- Founder of CheironX: AI-supported GRC management (ISO 27001, BSI IT-Grundschutz, TISAX, DORA)
- Strategic focus on Agentic AI and GenAI for modern IT Governance, Risk & Compliance Management
- IT interim management and strategic consulting
Rudolf E.
Last position:
Datacenter Engineer, Network & Security Administrator at International insurance group
Operation and further development of the network and security infrastructure.
Monitoring, analysis and resolution of network and security incidents.
Cross-department collaboration with other specialist teams for operations, further development and reporting.
Firewall vulnerability analysis.
Firewall rule approvals.
Troubleshooting IP communication issues in the network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal regulations.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Boris S.
Last position:
Generalist expert for software development at Mercor
- Training AI models, evaluating images and text UI/UX, turning the provided data into insights through OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Hervé T.
Last position:
Senior Data Engineer at Schweizerische Post AG
Tools: Fabric, AWS, dbt, Power BI, SQL, DWH, R, Python
- Supported customers in implementing an architecture design for extracting and preparing data
- Planned the design and implementation of the BI and DWH platform
- Ensured the scalability and performance of the data platform
Laurin H.
Last position:
Software Architect (Freelance) at Care4Sure
- Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
- Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.
Saruna M.
Last position:
Master's Thesis at Heinrich Heine Universität
- Title: Enhancing Syntactic Awareness in Transformer Language Models for Hindi Dependency Parsing
- Investigated syntactic knowledge captured by transformer language models (RoBERTa, XLM-RoBERTa) for Hindi dependency parsing, a morphologically rich and low-resource language.
- Developed structure-aware model variants (Struct_Roberta_hi, Struct_XLMR) by integrating a CNN-based parser network between transformer layers, inspired by the StructFormer architecture.
- Conducted extensive error analysis including label-wise, distance-based, direction-based, sentence length-based, and LVC/Non-LVC evaluations.
- Evaluated models on downstream NLP tasks (NER, POS tagging) using the IndicXTREME benchmark.
Anupriya P.
Last position:
Senior Software Engineer at Telefonica Germany
(Maternity/Parental Leave: July 2023 – Aug 2024)
- Domain: Payment Domain | Client: Telefonica Germany
- Project: General Payment Service
The General Payment Service is responsible for processing of online payments via external payment service provider like Safer pay and PayPal
- Developed Design of Use (DOU) and interface contract documentation, ensuring clarity and compliance across system integrations
- Designed and delivered REST/SOAP web services with Spring Boot and Spring Data JPA, publishing Swagger contracts through WSO2 API Gateway to improve accessibility and governance.
- Spearheaded the on-premises to AWS Cloud migration, re-platforming from Oracle to PostgreSQL on AWS RDS and deploying services on EC2, improving scalability and cost efficiency.
- Containerized microservices using Docker and orchestrated deployments with Kubernetes, streamlining deployment pipelines and improving system reliability.
- Implemented proactive monitoring and logging via AWS CloudWatch and Kibana, ensuring stability and performance during cutover.
- Enhanced collaboration through code reviews and peer reviews, promoting maintainability and clean coding standards.
- Strengthened quality by writing comprehensive JUnit tests and preparing detailed test cases enabling early defect detection
- Delivered automated API testing with Ready API, Postman, and SOAPUI, and conducted performance testing with JMeter, ensuring reliability in high-transaction environments.
Celil U.
Last position:
ZÜRS Geo 2021 at adesso SE
- Frontend development
- Spring Boot
- Swagger
- Git
- GitLab
- SonarQube
- Docker
- Maven
- Java
- Angular
Markus M.
Last position:
Project Manager: Engineering Excellence at EnBW Energie Baden-Württemberg
- Evaluation and further development of Engineering Excellence initiatives as part of the “Digital First” program
- Validation of efficiency, productivity, and cost-saving potential in the Software Development Lifecycle (SDLC)
- Organization-wide analysis of the use of Generative AI in the Software Development Lifecycle (SDLC)
- Evaluation of optimization measures in the areas of product management, delivery, developer experience, metrics, and quality assurance
- Comparison of the target vision “Next Level Architecture (NLA)” with regard to organizational design, governance model, and scalability
- Identification of structural bottlenecks in the delivery organization and development of alternative optimization approaches
- Preparation of decision-making and management documents for division management and the Executive Board to evaluate efficiency potential and transformation measures
Skillset: Engineering Excellence, Operating Model Design, Generative AI, AI in SDLC, SAFe, DevOps, Software Delivery Metrics, Value Streams, Team Topologies, Domain Driven Design, Azure DevOps, Jira, Confluence, Management Reporting, Business Case Assessment
Björn W.
Last position:
Software Audit and Architecture Consulting: Portal Software
- I carried out a software audit and architecture consulting for an existing portal software for infrastructure provisioning for a company that offers virtual reality environments.
- Role: Mentoring and consulting
- Technologies used: Java
Henok A.
Last position:
Founder and Managing Director at Afworki GmbH IT-Consulting
The goal of Afworki GmbH IT-Consulting is to make small and medium-sized companies more competitive by overcoming challenges in digitalization, automation, and data management.
Tailored technology, strategy, and specialist consulting designed to meet the individual needs of each company.
Analyzing the company's current situation and developing the best possible solution together with the client.
Using both agile and classical IT project management methods to deliver projects on time and within budget.
Focusing on automating and orchestrating all data flows in a data warehouse to create a unified and standardized data foundation.
Considering the dependencies between IT and business to achieve sustainable positive effects.
Employing modern strategies and tools specifically tailored to the company's needs.
Supporting digitalization, the introduction of agile working methods, and the creation of up-to-date reports and analyses.
Objective: streamlining management and enabling well-founded, data-driven decision-making.
Adem S.
Last position:
IT Consultant (Test Manager) & CEO at Trikolon Consulting GmbH
- Development and implementation of test concepts for complex, multi-layered systems
- Creation of regular management reports and presentations for stakeholders and clients
- Technical and disciplinary leadership of international test teams (coordination, coaching, resource planning)
- Responsibility for quality assurance across multiple test levels (unit, integration, system, and acceptance tests)
- Design of test cases and test plans in Azure DevOps; ensuring traceability and coverage
- Use of BDD approaches (Gherkin/Cucumber) to prepare test automation
- Building a test automation architecture with Playwright and integrating new tests into CI/CD pipelines
- Performing API tests (REST) and tests for mobile/PWA applications
- Setup and maintenance of test environments across multiple stages (integration, QA, UAT, pre-production)
- Test data management (synthetic and production-like data), ensuring consistency and reproducibility
- Collaboration with DevOps teams for containerization (Docker/OpenShift) and CI/CD integration
- Working under SAFe & Scrum, closely coordinating with product owners and DevOps teams
- Active participation in PI plannings, sprint reviews, and retrospectives
- Promoting an agile QA culture through coaching and knowledge sharing
- Introducing scalable test automation with Playwright → significant reduction of manual testing efforts
- Increasing test transparency through clean defect and reporting management in Azure DevOps
- Improved release quality through an end-to-end QA strategy and automated regression tests
- Strategic leadership of Trikolon Consulting GmbH and responsibility for finance, personnel, and business development
Asım Y.
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Mike H.
Last position:
IT-Consultant & Founder at QFITS GmbH
In my role as Managing Director of QFITS GmbH, I support companies throughout the entire project cycle - from requirements gathering and process analysis to the design of suitable system solutions and all the way to implementation and quality assurance. My focus is on the introduction and integration of POS and ERP systems as well as their seamless connection to existing backend systems and interfaces.
Direct food sales (09/2025 – 05/2026) Support of a project from requirements analysis to the introduction and integration of a new POS system for a direct food sales company. A special focus was on archiving POS logs as well as preparing and providing them as transactions for connected surrounding systems. In addition, design and setup of functional tests and performance tests for the existing backend system, which had to be seamlessly integrated with the POS system.
Ahmet C.
Last position:
Senior Android Developer at enbw
- Support in restructuring and designing the group's internal Android apps
- Defining essential modules and implementing accessible components
- Establishing agile approaches at an international level
- Technologies & Methods: Kotlin, Android, JUnit 5, Koin, Azure DevOps, Android Studio, Git, Jetpack Compose, Coil, Flow API, Ktor, Coroutines, TypeScript, Node.js
Discover over 15,000 top freelancers
Statistics of experts using Java
Aggregated from the professional profiles of matched freelancers.
Experience
18 years (Germany: 19 years)
Position duration
1.7 years (Germany: 3 years)
Positions per freelancer
13 (Germany: 12)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Banking and Finance
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
88% (Germany: 91%)
Master's degree or higher
58% (Germany: 55%)
Doctorate
6% (Germany: 7%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
97%
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 Essen 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.
Discover detailed Java rate benchmarks:
Explore rate insightsAverage rates of experts in Essen 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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Java 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%)
- Manufacturing (49%)
- Banking and Finance (46%)
- Healthcare (41%)
- Automotive (38%)
- Professional Services (38%)
- Insurance (36%)
- Retail (36%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Java at a glance
Java is a general-purpose programming language and runtime used to build reliable software across enterprise, cloud and embedded environments. Its strong typing, mature tooling and broad library ecosystem support long-lived systems where maintainability, security and predictable performance matter.
What Java builds
Java is common in customer portals, transaction systems, logistics software, data platforms and internal business applications. It supports modular monoliths, distributed services and Android applications, although Android work often uses Kotlin alongside Java.
- Backend services and REST or event-driven APIs
- Spring Boot applications for business workflows
- Banking, insurance and logistics platforms
- Batch processing, integrations and data pipelines
Ecosystem and tooling
Strong Java specialists work across the Java Platform, the JVM and frameworks such as Spring, Spring Boot, Jakarta EE and Hibernate. They use Maven or Gradle for builds, JUnit and Mockito for testing, and tools such as Docker, Kubernetes, Git and CI pipelines for delivery. Kafka, PostgreSQL and cloud services often complete the surrounding system.
When companies need support
Companies bring in freelance Java expertise when a new service must be delivered, a legacy application needs controlled modernization or an overloaded team needs focused capacity. In Essen, Java supports software and industrial operations as well as business systems; remote collaboration can work well when architecture, interfaces and handovers are clearly documented.
- Splitting a monolith into well-defined services
- Improving API design, test coverage or deployment flow
- Connecting Java systems with ERP, CRM or event platforms
- Reviewing security, performance and maintainability risks
Skills that matter
A capable Java professional understands object-oriented design, concurrency, memory management and API contracts rather than only the syntax. They can select an appropriate framework, model domain logic, handle persistence and explain trade-offs between synchronous calls, messaging and batch work. Familiarity with observability and secure coding is equally important.
Choosing a strong specialist
Review delivered systems, not just a list of Java keywords. Ask how the specialist tested integrations, handled failures, measured performance and kept releases safe. A short technical discussion should reveal whether they can reason about domain boundaries, database behavior and operational support. Agree early on coding standards, review practices, documentation and the expected balance of on-site work in Essen and remote collaboration.
Frequently asked questions
Quick answers to the questions that come up most around Java.
Java is widely used for enterprise applications, backend services, APIs, financial systems, logistics platforms and data-processing workloads. Its mature ecosystem makes it suitable for systems that need long-term maintenance, integration and consistent behavior.
Java and C# offer similarly mature object-oriented ecosystems, but they are most closely associated with different platform communities and tooling. Kotlin runs on the JVM and can interoperate with Java, often providing more concise syntax while Java remains important for existing codebases and broad library support.
A strong Java specialist often works with Spring Boot, SQL, REST, messaging systems and automated testing. Docker, Kubernetes, cloud services, CI pipelines and observability tools are also valuable when the work reaches production.
The right level depends on the system’s risk, scope and condition rather than a fixed number of years. A small API may need focused implementation skills, while a regulated or highly integrated Java platform calls for proven architecture, testing, security and production support experience.
Yes, Java projects are often well suited to remote collaboration because source code, tests, build pipelines and documentation can be shared digitally. On-site sessions in Essen may still help with domain discovery, workshops or coordination with teams handling physical operations.
Spring Boot is a practical choice for Java services that need convention-based configuration, web endpoints, security, persistence and production integrations. It can speed delivery, but the specialist should still control dependencies, boundaries and operational complexity instead of adding modules without a clear need.
Ask for examples of systems they improved or delivered and explore the decisions behind testing, error handling, database access and deployment. A quality Java professional explains trade-offs clearly, writes maintainable code and considers monitoring and support after release.
A Java engagement may involve established coding standards, shared ownership of services and close coordination with product, operations or security specialists. Clarify the Java version, framework choices, build process, review expectations and whether the team uses English or German for documentation and meetings.
The average hourly rate of freelancers in Essen, Germany who have used Java in their recent projects is 99 €, which corresponds to a daily rate of about 793 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used Java in their recent projects, 88% hold at least a Bachelor's degree, 58% hold at least a Master's degree, and 6% hold a doctorate.
On average, freelancers in Essen, Germany who have used Java in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Essen, Germany who have used Java in their recent projects are German (100%), English (95%), and French (33%).
The most common industries among freelancers in Essen, Germany who have used Java in their recent projects are Information Technology (92%), Manufacturing (49%), and Banking and Finance (46%).
The most common business areas among freelancers in Essen, Germany who have used Java in their recent projects are Information Technology (92%), Product Development (79%), and Project Management (72%).
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.
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