Java Experts in Essen
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Meet FRATCH Experts in Essen, who have recently used Java
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- AI product development: Design of an AI-supported GRC platform to automate compliance processes.
- AI expertise: Strategic deepening in Agentic AI and GenAI as a core asset for modern IT governance
- IT interim management and strategic consulting
Rudolf Eggelbusch
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 Solos
Last position:
Generalist expert for software development at Mercor
- Training the AI models, evaluating images and texts for UI/UX, turning the provided data into insights via OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Hervé Teguim
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 Hagemann
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.
Celil Uzunel
Last position:
ZÃœRS Geo 2021 at adesso SE
- Frontend development
- Spring Boot
- Swagger
- Git
- GitLab
- SonarQube
- Docker
- Maven
- Java
- Angular
Björn Wilmsmann
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
Asım Yurduseven
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
Gilbert Huwar
Last position:
Process Design: Solution Development and Release Management at E.ON Digital Services
- Led workstream for analysis and optimisation of the solution development and release process within the newly established organizational structure
- Analyzed and adopted existing processes after transition of technical responsibility to E.ON Digital Services
- Supported the agile development approach within engineering teams
- Established a unified workflow for business requirements and clear communication interfaces, documented using Atlassian Jira on both the business and engineering sides
- Created dashboards with Rich Filters for Jira Dashboards to provide an overview of feature releases and their connection to technical releases
- Designed new burnup charts and statistics per release to improve transparency of overall technical progress at the product level
Andreas Adam
Last position:
IT-Application Manager at IHK-GfI
- Gathering, analyzing, specifying, and prioritizing requirements for the 'Archive and Delete' module of the Chambers of Industry and Commerce in a Scrum team
- Capturing and specifying screen/form designs, functionality, and data types in Confluence, as well as creating user stories in Jira
- Preparing PowerPoint presentations for the 'Archive and Delete' module
- Coordinating and supporting the Chambers of Industry and Commerce in the implementation of the module
- Writing SQL scripts for an Oracle database
- Technologies used: Scrum, Confluence, Jira, MS Office, Postman, JavaScript, REST API, JSON, DBVisualizer, SQL
Hendrik Levering
Last position:
Senior Modernization Engineer – Legacy Web App Performance & Refactoring (Energy Sector) at Levering IT GmbH
Re-architected a web application that had grown over years, modularizing tightly coupled components
Reduced response times from several seconds to <50 ms
Removed performance bottlenecks
Simplified architecture so internal teams can implement features on their own again
Damian Dessler
Last position:
Senior Business Consultant at foryouandyourcustomers
- Led international projects and provided strategic support for digital transformation as a specialist in Product Information Management (PIM), Master Data Management (MDM), and Digital Supply Chain.
- Implemented complex PIM/MDM solutions with Stibo STEP.
- Led SAP S/4HANA transformations in the master data area.
- Transformed complex digital landscapes into understandable structures using the ExplodedView method and enabled well-founded decisions.
Loic Ngansop Njoya
Last position:
Development of an app for managing Power Platform components at Hays GmbH
- Requirements analysis
- Provisioning of SharePoint sites and permissions
- Provisioning of SharePoint libraries and lists as data storage
- Development of the UI with Power Apps
- Development of automations with Power Automate to transfer data from Power Apps using Dataverse connectors
- Creation, customization, and management of Power Platform security roles
- Creation and management of Power Platform pipelines
- Development of UX design with Power Apps
Mike Heinke
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.
Musa Musakhanli
Last position:
Qa Engineer at TD Bank
- Designed and implemented an automation test framework using Junit and Maven, developing BDD scripts with Cucumber and reusable methods for application behavior.
- Created test data using automation scripts with Selenium WebDriver, Java, and Python, validating UI components, popup windows, and mouse movements.
- Conducted API functional testing of RESTful web services using Postman.
- Automated test execution using Maven and integrated with Jenkins, achieving a 20% reduction in regression testing time.
Discover over 15,000 top freelancers
Statistics of experts using Java
Aggregated from the professional profiles of matched freelancers.
Experience
17 years (Germany: 19 years)
Position duration
1.8 years (Germany: 2.9 years)
Positions per freelancer
14 (Germany: 13)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Automotive
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
84% (Germany: 91%)
Master's degree or higher
60% (Germany: 55%)
Doctorate
8% (Germany: 7%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
100% (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 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.
Average 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Java at a glance
Java is a general-purpose language for backend systems, business software, batch jobs, and large enterprise services. It runs on the JVM, which makes it a common choice for long-lived systems that need stability, strong tooling, and predictable performance.
What specialists deliver
- Spring Boot services and REST APIs
- Java SE applications and internal tools
- Integration work with databases, queues, and identity systems
- Migration from older Java code or Java EE / J2EE stacks
Ecosystem and tooling
Strong Java professionals work with OpenJDK, Maven or Gradle, JUnit, and frameworks such as Spring and Jakarta EE. They also know how to read build pipelines, manage dependencies, and keep code compatible across Java versions.
When companies bring help in
Companies look for freelance Java expertise when a product needs new backend features, a legacy platform needs care, or an integration must be delivered without slowing the team down. In Essen, that often means support for industrial software, logistics systems, service portals, or internal business applications that need reliable release work.
What good experts do well
Good Java specialists write code that is easy to test, refactor, and extend. They pay attention to thread safety, resource handling, API design, and the small decisions that keep services maintainable over time.
Working model
Java work fits both remote and on-site collaboration. For teams in Essen, onsite time can help with discovery, handovers, and older systems, while remote work is often enough for implementation, review, and support when the interfaces are clear.
Frequently asked questions
Quick answers to the questions that come up most around Java.
Java is often used for backend services, enterprise applications, integration layers, batch processing, and internal business tools. It is also common in systems that need long-term maintainability, strong typing, and a mature ecosystem around testing and deployment.
Java is usually chosen when a team wants a broad ecosystem, stable server-side tooling, and a large body of existing code. Kotlin shares the JVM runtime and can fit well beside Java, while C# is strongest in Microsoft-centered environments and Go is often picked for simpler, smaller services. The best choice depends on the surrounding stack and the type of system being built.
A strong Java specialist usually works comfortably with Spring Boot, SQL, REST APIs, testing tools such as JUnit, and build systems like Maven or Gradle. For many projects, knowledge of Docker, cloud deployment, messaging, and authentication also matters because Java often sits in the middle of a larger system.
A small internal tool may only need a specialist who can work inside an existing codebase and deliver focused changes. A core platform, migration, or integration project needs someone who understands architecture, dependency management, testing strategy, and how to keep a Java system stable during change.
Yes, Java is one of the most common choices for maintaining and extending older business systems. Many companies keep valuable services running on Java while modernizing them step by step with better tests, cleaner modules, and newer framework versions.
Often yes. Java tasks such as feature work, bug fixing, reviews, and test automation are usually easy to do remotely, while discovery sessions, workshops, or support for older on-premise systems may benefit from time in Essen when close collaboration is needed.
Look for clear code structure, good test coverage, sensible dependency use, and a calm approach to refactoring. A strong Java freelancer explains trade-offs, keeps APIs consistent, and knows when to improve the codebase without creating unnecessary change.
Java is the language and the runtime ecosystem built around the JVM. OpenJDK is a widely used implementation of the Java platform, while Jakarta EE is the modern continuation of the older Java EE / J2EE enterprise stack. In practice, people may search for any of these names when they need a Java specialist.
The average hourly rate of freelancers in Essen, Germany who have used Java in their recent projects is 98 €, which corresponds to a daily rate of about 784 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used Java in their recent projects, 84% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers in Essen, Germany who have used Java in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 1.8 years.
The most common languages among freelancers in Essen, Germany who have used Java in their recent projects are German (100%), English (97%), and French (34%).
The most common industries among freelancers in Essen, Germany who have used Java in their recent projects are Information Technology (90%), Manufacturing (48%), and Automotive (45%).
The most common business areas among freelancers in Essen, Germany who have used Java in their recent projects are Information Technology (90%), 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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Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
