Java Experts in Leipzig
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Meet FRATCH Experts in Leipzig, who have recently used Java
Jens Oberender
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Freelance Java Developer / DevOps Engineer at Unpublished defense company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 Fischer
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 Fadeeva-Gladbach
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
Mostafa Shawki
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.
Knud Werner
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 Fischer
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 Silva
Last position:
Physicist at UFPR Curitiba
- Conducting research
- Study about interaction radiation with matter
Hannes Witt
Last position:
intermedix GmbH / CGM Deutschland AG
Rule-based software for managing, planning and delivering marketing materials in the pharmaceutical industry
High performance, high availability
Fullstack, DevOps (CI/CD)
Python, PostgreSQL, Vue.js, TypeScript, Docker, Docker Compose, Nginx
Successfully migrated old Excel-based processes into an optimized product that has been in production since 2024
Sebastián Katzer
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 Cernohorsky
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
Andreas Müller
Last position:
Managing Director at ESIS-ERP GmbH
- took over as managing director
Marc Davies-Schneider
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 Lange
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
2.2 years (Germany: 2.9 years)
Positions per freelancer
12 (Germany: 13)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Education, Automotive
Certification focus areas
Information Technology, Audit, Logistics
Bachelor's degree or higher
91%
Master's degree or higher
64% (Germany: 55%)
Doctorate
18% (Germany: 7%)
Certifications per freelancer
1 (Germany: 3)
Most common languages
English, German, French
Speak two or more languages
92% (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 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.
Average 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Java work
Java is used for backend services, business software, APIs, integration layers, and high-load systems. It is a standard choice when teams need stable code, clear structure, and a large ecosystem around the JVM.
Typical builds
- Spring Boot services and REST APIs
- Jakarta EE and enterprise applications
- Batch jobs, messaging, and workflow systems
- Tools, internal platforms, and data processing services
- Modernization of older Java systems
Ecosystem
Strong Java specialists work across the JDK, Spring, Maven, Gradle, JUnit, and common application servers. They also understand build pipelines, dependency management, logging, observability, and deployment on cloud or container stacks.
When teams bring help
Companies usually bring in freelance Java expertise when delivery is blocked, a legacy system needs careful change, or a new service must fit into an existing platform. In Leipzig, that often means support for local software teams, industrial systems, logistics software, and hybrid remote setups.
What strong experts do
Strong Java professionals write code that is easy to maintain, test, and extend. They keep interfaces clean, spot performance issues early, and handle refactoring without breaking business logic.
What to check
Look for practical experience with the JVM, testing discipline, and real delivery work on production systems. Good specialists can explain trade-offs clearly, work with your existing stack, and collaborate well with product, backend, and operations teams.
Frequently asked questions
Before you brief your next project: the most common questions about Java.
Java is commonly used for backend services, APIs, internal business systems, and integration work. It is also a strong fit for long-lived enterprise software, batch processing, and systems that need predictable behavior under load.
Java is often chosen for its mature ecosystem, broad hiring pool, and long track record in enterprise environments. Kotlin can feel more compact on the JVM, while C# is closely tied to the Microsoft stack; the right choice depends on your existing architecture and team skills.
A strong Java specialist usually knows Spring Boot, testing frameworks like JUnit, build tools such as Maven or Gradle, and working with SQL databases. Depending on the project, experience with REST, messaging, Docker, and cloud deployment is also useful.
A small, well-scoped Java task may only need someone with solid production experience and good code hygiene. Older systems, high-traffic services, or major refactoring work usually need someone who has already handled similar risks in live environments.
Most Java work can be done remotely, especially API work, testing, refactoring, and platform maintenance. On-site time in Leipzig can help when a project needs close coordination with internal teams, domain experts, or legacy system handover.
Ask which parts of the Java stack they have used in production, how they test their work, and how they handle old code. It also helps to ask about deployment, monitoring, and how they approach changes that affect business-critical flows.
Java is still a strong choice for new systems, especially when you want a stable backend platform with a deep ecosystem. It is also common in modernization work, where teams keep proven business logic but move it to cleaner services and better tooling.
Look for clear explanations, production examples, and disciplined use of tests and code reviews. A good Java professional can discuss design decisions, performance, and maintainability without hiding behind jargon.
The average hourly rate of freelancers in Leipzig, Germany who have used Java in their recent projects is 91 €, which corresponds to a daily rate of about 725 € 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, 64% 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 2.2 years.
The most common languages among freelancers in Leipzig, Germany who have used Java in their recent projects are English (92%), German (85%), and French (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 Quality Assurance (62%).
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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