Java Experts in Leipzig
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Meet FRATCH Experts in Leipzig, who have recently used Java
Jens O.
Last position:
Freelance Java Developer / DevOps Engineer at Unpublished defense company
- Extension of OSGi modules in a complex communication solution
- Debugging communication with Wireshark and remotely in the JENS test environment
- Migration of tests from TestNG to JUnit 5 with Mockito and AssertJ
- Updating vulnerable dependencies and improving code quality
- Changes to the Vaadin frontend
- Increasing test coverage
Andreas F.
Last position:
Project Manager & Portfolio Owner for Infrastructure (Automotive) at MHP Management- und IT-Beratung GmbH
- Overall coordination of service providers for all infrastructure topics at a production site being set up in Baden-Württemberg
- Design and finding solutions for internet connectivity, building office communication networks, setting up WLAN in production and administration buildings, IP address management, password policies, time tracking, access control systems, backup strategies, emergency power planning, operating concepts, cost planning, event management, workplace setup including laptop/mobile phones/telephony, remote support, print servers
- Selecting suitable external service providers and planning to meet needs for spare parts, repairs, on-site service, network and workplace support including on-site system replacement by providers
- Choosing suitable external service providers for facility management and building technology (fiber optic connections, data center infrastructure, cable ducts etc.)
- Coordination with clients and service providers
- Escalation management, schedule control
- On-site presence for service meetings and managing service providers
Natascha F.
Last position:
Senior iOS Developer - ANÜ at Stadtwerke München GmbH
- Development of an iOS app that combines public transport and sharing services
- Collaboration in Scrum within a large cross-functional team
- Creation of reusable components with SwiftUI and Combine
- Development of custom solutions for Apple Maps
Julian H.
Last position:
Working Student / Master's Thesis Student Software Development at Scale GmbH
- Tech-Stack: Python, Qt, tensorflow.js, plotly, Angular, TypeScript, HTML, CSS, Git
Mostafa S.
Last position:
Freelance Senior Software Engineer & AI Consultant at Self-employed
- Led the development of a complex geospatial data platform, engineering an end-to-end system for processing and analyzing high-resolution aerial imagery.
- Engineered a scalable backend responsible for on-the-fly map tile serving and running complex data analysis queries using PostGIS and Python.
- Developed and trained custom computer vision models using Python, PyTorch, and YOLOv8 to perform object detection and segmentation on large-scale datasets.
- Built modern, responsive user interfaces and data visualization dashboards using Next.js, TypeScript, and React.
- Gained practical expertise in geospatial libraries such as GDAL and Rasterio for processing and manipulating raster and vector data.
- Managed the entire project lifecycle, from initial technical architecture and database design to final deployment using Docker.
Andreas M.
Last position:
Managing Director at ESIS-ERP GmbH
- Took over management of the company
Knud W.
Last position:
Lead Programmer, Architect and Deputy Product Owner at Bundesagentur für Arbeit
- Lead programmer, architect and deputy product owner
- Completed transition from zPDV to STEP
- Ensured quality of C++ and Perl sources through automated and manual checks
- Supported resolution of incidents and errors in testing
- Implemented batch for supplementary assignment of payment run numbers
- Implemented batch for distribution of SGB 2 information to the central payment unit
- Supported replacement of Solaris with Linux
- Upgraded gcc from 7.4 to 9.3
- Programmatically generated Makefiles from Borland projects for builds
- Extended funding data with new attribute “internship travel cost indicator”
- Programmatically generated XSD and WSDL files from IDL definitions
- Represented the product owner when needed
- Implemented batch for one-time payment processing
- Developed generator for Liquibase files
- Implemented and maintained regular anonymization of production data
- Supported migration from SLES 12 to SLES 15
- Supported introduction of mutual TLS
- Implemented batch for sending deletion impulses to EDA BE
- Organized script directory structure
- Investigated potential introduction of String-Latin and implemented minimal solution
- Remediated security findings identified by CheckMarx
- Supported PAP recalculations and general change notices
- Converted ERP interfaces from SOAP to REST
- Planned technical and business topics such as register modernization, cash register security, training costs, four-eyes principle
Jens F.
Last position:
Strategic Business Consultant at EURO Kartensysteme
- Analysis, redesign and functional specification for a software system to record, process and reimburse all claims in the girocard scheme
- Analysis, conception and execution for a bidding for the introduction and implementation of Identity & Access Management, Masterdata Management and Document Management Systems
- Project management for the software development project for the EKS-Net platform for the recording, processing and reimbursement of all claims in the girocard scheme
- Project management for the introduction of Identity and Access Management System, Master Data Management System and Document Management System
- Strategy consulting for digitalization of business processes
- Advice on payment transactions, compliance (PEP and sanction list checks) and risk analysis
- Design of data models and APIs
Murilo S.
Last position:
Physicist at UFPR Curitiba
- Conducting research
- Study about interaction radiation with matter
Sebastián K.
Last position:
Smart Charging at Mercedes-Benz, MBTI
Agile software development in an interdisciplinary environment
Cross-team collaboration to achieve important milestones
Independently developing new and improving existing features
Estimation, refinement, implementation, and presentation
Finding solution ideas, analyzing problems, rolling out bug fixes
Writing automated tests, manual testing, log and error analysis
Ensuring high availability, fault tolerance, and scalability of the production environment
Rolling out releases and multi-stage infrastructure
Setting up alerts and monitoring
Pair programming, code reviews, documentation
On-call duty, 3rd level support
Event-Driven Architecture, Clean Code, Hexagonal Architecture
Microservices based on Go (Gin), Java 21 (Spring Boot 3), Python (FastAPI)
Terraform/OpenTofu, KQL, SQL, JSON, REST, Helm, ArgoCD, AzureCLI, K9s, OAuth2
Postgres, Redis, Kafka, Azure EventHub, Kubernetes, nginx, Ingress
AppInsights, LogAnalytics, OpenTelemetry, Datadog, OpenAPI 3, Swagger
Azure DataExplorer, Storage, KeyVault, Container Registry, Azure Functions,…
Junit5/Jupiter, testify, RestAssured, Docker Compose, Wiremock
IntelliJ, Scrum, Kanban, Teams, Confluence, OpsGenie, Arc42
GitHub CI/CD, GitLab CI/CD, Azure DevOps
EV charging protocols (EVSE, OCPP, V1G, V2G)
Tom C.
Last position:
Web Developer at Puder + Consortio; Feldenkrais Verena Tintelnot; Maxim Gorki Theater; Grunwald & Grundwald Architektur und Städtebau; Wanderkino
- Implementation and updates of various websites for:
- Puder + Consortio
- Feldenkrais Verena Tintelnot
- "Mely Kiyak hat Kunst" at the Maxim Gorki Theater
- Grunwald & Grundwald Architektur und Städtebau
- Wanderkino
Marc D.
Last position:
Development Engineer at DLR
- Developed control for optical transmitters for satellite communications
- Pulsed lasers and modulators in the double-digit GHz range
- Precise BIAS, TEC, and calibration control
- High-frequency circuit design and system integration
Robert L.
Last position:
Lead Developer (PHP + JS) Finc / VuFind catalog system at University Library Leipzig
Discover over 15,000 top freelancers
Statistics of experts using Java
Aggregated from the professional profiles of matched freelancers.
Experience
24 years (Germany: 19 years)
Position duration
2.7 years (Germany: 3 years)
Positions per freelancer
11 (Germany: 12)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Education, Automotive
Certification focus areas
Information Technology, Audit, Logistics
Bachelor's degree or higher
91%
Master's degree or higher
73% (Germany: 55%)
Doctorate
18% (Germany: 7%)
Certifications per freelancer
1 (Germany: 3)
Most common languages
English, German, Spanish
Speak two or more languages
92% (Germany: 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 Leipzig 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 Leipzig 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 (85%)
- Education (46%)
- Automotive (38%)
- Banking and Finance (38%)
- Energy (31%)
- Healthcare (31%)
- Professional Services (31%)
- Government and Administration (31%)
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 for robust, maintainable software. Its strong typing, mature tooling and broad library ecosystem support backend services, enterprise applications, Android-related systems and data-processing workloads. The Java Virtual Machine also enables applications to run consistently across operating systems.
What Java builds
Java professionals create transaction-heavy systems, APIs and distributed services that must remain reliable as usage grows. Common deliverables include customer portals, payment workflows, logistics software, internal platforms and integrations between business systems. Java is also widely used in regulated industries where traceability and long-term maintainability matter.
- REST and event-driven backend services
- Spring Boot applications and microservices
- Enterprise integrations and batch processing
- Cloud deployments with containers and orchestration
Ecosystem and tooling
The Java ecosystem includes Spring Framework, Spring Boot, Jakarta EE, Hibernate and popular build tools such as Maven and Gradle. Professionals work with JUnit, Mockito, OpenAPI, messaging systems and relational or document databases. They also use Git-based delivery pipelines, containers, observability tools and cloud services to operate applications safely.
When expertise helps
Companies often bring in freelance Java expertise when a legacy application needs modernization, a service platform must be extended or an internal team needs specialist capacity. Leipzig-based organisations can combine on-site workshops with remote delivery, while distributed teams benefit from clear documentation, reliable communication and well-defined interfaces.
- Migrating older Java applications to current frameworks
- Separating monoliths into well-bounded services
- Improving test coverage and release processes
- Connecting Java systems with external APIs and events
Strong professional skills
Strong Java professionals understand more than syntax. They design clear domain models, manage concurrency, handle errors deliberately and choose persistence patterns that fit the workload. They can explain trade-offs around service boundaries, performance, security and operational complexity without adding unnecessary layers.
Choosing the right specialist
Review experience with systems similar to the planned product, not only a list of frameworks. Ask for examples of production ownership, testing strategy, deployment practices and integration work. A capable specialist can clarify assumptions, identify technical risks early and leave behind readable code, useful documentation and a maintainable delivery process.
Frequently asked questions
Before you brief your next project: the most common questions about Java.
Java is commonly used for enterprise backends, web services, financial systems, logistics platforms, internal applications and data-processing tools. Its mature ecosystem suits products that need stable operation, clear structure and long-term support.
Java is often weighed against C# for enterprise software and against Python for automation, data work and rapid prototyping. C# fits naturally with the .NET ecosystem, while Python can be quicker for exploratory work; Java is a strong choice when portability, strict structure and mature operational tooling are central.
A strong Java specialist often works with Spring Boot, SQL, REST, messaging, Docker, cloud infrastructure and automated testing. Knowledge of security, observability, CI/CD and domain-driven design is also valuable for production systems.
The right level depends on the system’s risk, scope and existing team. A straightforward service may need focused framework knowledge, while a distributed or regulated application calls for proven skills in architecture, testing, security, operations and legacy integration.
Yes. Java projects are well suited to remote collaboration because source code, tests, documentation and delivery pipelines can be shared digitally. Teams in Leipzig may still prefer on-site workshops for discovery, architecture decisions or coordination with local stakeholders.
Spring Boot is a practical choice for building production-ready Java services with sensible defaults, dependency management and integrations for web, data and security concerns. It is especially useful when a team wants consistent service structure without configuring every infrastructure detail manually.
Look for readable design, meaningful tests, secure dependency handling and evidence of production monitoring. A reliable Java professional can explain why an approach was chosen, show how failures are handled and describe how the system can be changed safely.
Java teams often use code review, automated builds, issue tracking and shared architectural standards. Freelancers should be comfortable joining an existing Spring or Jakarta EE codebase, documenting decisions and communicating clearly across remote or on-site collaboration.
The average hourly rate of freelancers in Leipzig, Germany who have used Java in their recent projects is 93 €, which corresponds to a daily rate of about 742 € based on an 8-hour working day.
Of the freelancers in Leipzig, Germany who have used Java in their recent projects, 91% hold at least a Bachelor's degree, 73% hold at least a Master's degree, and 18% hold a doctorate.
On average, freelancers in Leipzig, Germany who have used Java in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Leipzig, Germany who have used Java in their recent projects are English (92%), German (85%), and Spanish (23%).
The most common industries among freelancers in Leipzig, Germany who have used Java in their recent projects are Information Technology (85%), Education (46%), and Automotive (38%).
The most common business areas among freelancers in Leipzig, Germany who have used Java in their recent projects are Information Technology (85%), Product Development (85%), and Project Management (54%).
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 
Dortmund 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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FRATCH CEO
