Jakarta EE Experts in Stuttgart
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Meet FRATCH Experts in Stuttgart, who have recently used Jakarta EE
Sercan Tatar
Last position:
Co-Founder & Lead Software Architect at Pflege-Pfad
- Focus: system architecture, cloud-native platforms, microservices, API design
- Product: Pflege-Pfad is a digital matchmaking platform that connects relatives of people in need of care directly with verified care services and caregivers - without an agency and without ongoing fees.
- Business analysis & process design:
- Analysis of the German care market and identification of the key pain points of both target groups.
- Modeling of the core business processes: registration, verification, care request, application, placement, and rating.
- Definition of the business model as a freemium/premium model with optional contact unlocking.
- Creation of user stories and requirements documentation for relatives, care services, and administrators.
- Design of trust and quality assurance mechanisms with document upload, admin review process, and rating system.
- Coordination with stakeholders and validation of product decisions with potential users.
- Technical implementation:
- Design and implementation of the entire platform architecture as a solo developer.
- Design and implementation of a REST API with Spring Boot and Kotlin, including JWT-based authentication.
- Development of the frontend as a single-page application with Angular 17.
- Implementation of the AWS infrastructure with EC2, RDS PostgreSQL, S3, CloudFront, and IAM.
- Document upload with AWS S3 via presigned URLs for verification of care services.
- Email notifications via Resend API.
- AI-supported care service search via OpenAI API.
- Implementation of complete user flows such as registration, login, password reset, and placement process.
- Building an admin panel for user and care service management as well as analytics.
- CI/CD with GitHub Actions and containerized deployments with Docker.
- End-to-end tests with Playwright.
Technologies: Kotlin, Spring Boot 3, Spring Security, JWT, JPA/Hibernate, PostgreSQL, Angular 17, TypeScript, RxJS, AWS (EC2, ECS, S3, CloudFront CDN, RDS PostgreSQL, IAM), nginx, GitHub Actions, Playwright, Maven, Git, OpenAI API, Resend API, Docker, Scrum, i18n (DE/EN/TR), Kiro, feature-flag architecture.
Artyom Narimanyan
Last position:
AI Automation Engineer & Solution Architect at Technology Research Project
Designed and developed an AI-powered automation platform using n8n to analyze social media niches, identify target audiences, and automate marketing strategy generation. The solution combined AI agents, workflow orchestration, and data analysis to automate research processes and generate data-driven insights.
- Designed and implemented complex automation workflows using n8n
- Developed AI-powered analysis agents for market and audience research
- Integrated multiple APIs and AI services into automated workflows
- Built automated market, competitor, and target audience analysis pipelines
- Leveraged Large Language Models (LLMs) for information summarization, classification, and prioritization
- Containerized and deployed the platform using Docker
Technologies: n8n, AI Agents, OpenAI APIs, Prompt Engineering, LLMs, Docker, Linux, REST APIs, Webhooks
Robin Sadlo
Last position:
Senior Cloud & Backend Engineer at Media-Saturn-Holding GmbH
- Implementing applications with Kotlin and Ktor as microservices
- Using MongoDB in the MongoDB Atlas cloud
- Asynchronous communication of services via Google Pub/Sub
- Using Kotest and MockK for unit tests
- Developing an administration frontend with TypeScript, React and Express.js
- Provisioning environments in GCP using Terraform
- Implementing CI/CD processes with GitHub Actions
- Operating scalable production and test environments in GCP with Kubernetes, Helm and Flux CD
- Monitoring environments with Prometheus and Grafana
- Providing BI data in the Google BigQuery data warehouse
Will Orrantia
Last position:
Solution Architect at Stuttgart Police Authority
Designing the migration strategy for WLS applications to the BKA cloud and Stack IT
Creating a hybrid cloud for internal testing and development with Kubernetes
Transforming the IT landscape from a legacy monolithic architecture to a cloud-based architecture
Integrating new CI/CD processes using Azure Pipelines
Quadrupled the throughput of personnel security checks
Migrated personnel security clearance applications to Docker-based applications
Built CI/deploy pipelines with Azure DevOps
Environment: Java Spring Boot, Kubernetes, Oracle WebLogic, OpenID, Camunda, JUnit, TOGAF
Achille Chimi
Last position:
Backend/Frontend Developer at ITZ-Bund
Development of a microservice application for calculating postings on accounts
Development of backend components with Java or JEE, Quarkus, Kafka, Rest API
Development of the test component with mocking frameworks (Mockito)
Development of integration test components
Creation of OpenAPI specification format
Configuration of CI/CD pipeline
Development of frontend components with React
Design, further development and optimization of system structures
Code review
Java Corretto 21, JEE, Quarkus, Golang
Reactive programming with Spring WebFlux, Project Reactor
Git, Azure DevOps for CI/CD pipeline, YAML, Json Swagger UI, Postman, Rest OpenAPI, Kafka Streams, Kafka Connect, Log4J
Microservices, Jira, Confluence, MySQL, Docker, Kubernetes (deployment via Helm charts)
Spring Security, OAuth 2, JWT, Sonarqube
IntelliJ, Maven, logging framework Splunk, Agile method Scrum, Nexus, Vaadin V24, build tool Vite
React, React.JS, Node.js, Jess/JavaScript, Tailwind CSS, Agile method Scrum, accessibility BITV, Playwright
Alexander Zubok
Last position:
Fullstack Developer and DevOps Engineer at Freelancer
- Develop infrastructure and enhance existing infrastructure: Jenkins, GitLab Pipeline, OpenShift, Docker, Helm Chart, Kubernetes, Artifactory, CodePipeline, CodeArtifact, Python
- Document solutions in Jira/Confluence
- Support other colleagues in various technical areas
Colin Weitmann
Last position:
Founder & CTO at Savvi Learning GmbH
- Managing director (CTO/CFO) and founder of Savvi and Sparklyft
- Management of the entire product team incl. development team & content team
- Responsible for product strategy, go-to-market, project management, integration projects, business planning, etc.
Elvir Büyükbayrak
Last position:
Software Architect and Software Developer at Noctica IT GmbH
- NocTime time tracking, workshop planner, meal delivery service app
- LLM-based chat bot to control the NocTime time tracking system via voice input
- New and further development of customer solutions based on the Noctica SAS app framework
- Technologies: Java 17, Spring Boot, JPA, Hibernate, JavaScript, TypeScript, Angular 20, Angular Material, React, C#, Docker, Bash, Git, GitLab, RedMine, SQL, DBeaver, MariaDB, PostgreSQL, Python, TensorFlow, Ollama, various LLMs
Dominik Wei-Fieg
Last position:
Head of Mobile Development / CTO at MOSAIC BLABBER
- Technology strategy planning concerning the client-server and blockchain environments
- Development of smart contracts for the EOS blockchain using C++, Python and JavaScript and for Ethereum using Solidity
- Development of the BLABBER mobile app for iOS and Android using React Native
Discover over 15,000 top freelancers
Statistics of experts using Jakarta EE
Aggregated from the professional profiles of matched freelancers.
Experience
16 years (Germany: 22 years)
Position duration
2.1 years (Germany: 2.2 years)
Positions per freelancer
14 (Germany: 15)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Project Management
Bachelor's degree or higher
100% (Germany: 91%)
Master's degree or higher
44% (Germany: 51%)
Certifications per freelancer
2 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 96%)
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 Stuttgart 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 Stuttgart using Jakarta EE
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 platform
Jakarta EE is the enterprise Java platform for server-side systems that need structure, security, and long-term maintainability. It is the continuation of Java EE, so many teams still search for both names when they need help. Experts use it to build business applications, internal portals, APIs, and integration layers.
Typical work
- Build REST and SOAP services
- Modernize Java EE applications to Jakarta EE
- Design persistence with JPA and transaction handling
- Implement authentication and authorization flows
- Package applications for application servers and containers
Ecosystem skills
Strong specialists know the Jakarta APIs and the tools around them: Servlet, JAX-RS, JPA, CDI, Bean Validation, JMS, and Jakarta Security. They also understand common servers such as WildFly, Payara, Open Liberty, and Eclipse GlassFish. Good work here is about clean boundaries, stable deployment, and code that can survive change.
When to hire
Companies bring in freelance Jakarta EE expertise when a platform is old, business-critical, and hard to touch without risk. That is common in insurance, manufacturing, public sector systems, and other enterprise environments in Stuttgart and across Germany. Freelancers help with upgrades, bug fixes, performance work, and release-safe refactoring.
What good looks like
A strong professional can read existing code quickly and explain how requests, transactions, and persistence really flow through the system. They write clear tests, handle legacy dependencies with care, and keep deployment advice practical. They also know when a smaller change is safer than a broad rewrite.
Collaboration
Jakarta EE work often fits remote delivery well, especially for analysis, implementation, and review. On-site time can still help when the system is tightly linked to local teams, release processes, or sensitive infrastructure. In Stuttgart, clear English is usually enough for code and documentation, while project meetings may need simple, precise communication.
Frequently asked questions
Not sure where to start with Jakarta EE? These answers cover the essentials.
Jakarta EE is used for enterprise server applications that need reliable business logic, transactions, security, and integration with existing Java systems. Companies choose it for APIs, internal business portals, workflow systems, and back-end services that must stay stable over time. It is a common fit when the application is more important than the user interface.
Jakarta EE is the modern name for what many teams still call Java EE. The platform was moved under the Eclipse Foundation, and the package names changed from javax to jakarta in newer generations. That matters when a project is being upgraded or when mixed dependencies need careful handling.
Jakarta EE is a standards-based enterprise platform, while Spring Boot is a framework with its own opinionated style. Teams often pick Jakarta EE when they want portable APIs and a traditional application-server model, especially in larger enterprise landscapes. The right choice depends on the existing stack, deployment model, and how much change the team wants.
A strong Jakarta EE specialist usually also knows JPA, CDI, JAX-RS, Servlet concepts, testing, and deployment on servers such as WildFly or Payara. Integration work often needs SQL, message systems, authentication, and an understanding of legacy Java libraries. For older systems, experience with Java EE migration paths is especially useful.
A Jakarta EE project usually needs someone who has worked with enterprise code before, not just someone who has seen the APIs once. If the system is small and greenfield, a focused specialist can move quickly. If it is a long-lived business platform, you want someone who has handled refactoring, upgrades, and production issues.
Yes, most Jakarta EE work can be done remotely because the core tasks are code, tests, reviews, and deployment preparation. Remote collaboration works well when the team has good documentation and clear release steps. On-site sessions in Stuttgart can still help during system discovery, stakeholder workshops, or risky cutover phases.
Look for someone who can explain the architecture in plain words and show how they would reduce risk. A good Jakarta EE specialist writes maintainable code, keeps transactions and persistence clear, and avoids unnecessary framework changes. Quality also shows up in careful migration plans, useful tests, and realistic advice about what should not be changed yet.
Jakarta EE can be a very good choice for new systems when a company wants standard APIs, long-term support, and a clean enterprise structure. It is especially useful in organizations that already run Java-based back ends or need a proven path for application-server deployment. For smaller products, teams should still compare it with lighter stacks before deciding.
The average hourly rate of freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects is 107 €, which corresponds to a daily rate of about 860 € based on an 8-hour working day.
Of the freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects, 100% hold at least a Bachelor's degree and 44% hold at least a Master's degree.
On average, freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects have 16 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects are German (100%), English (100%), and French (22%).
The most common industries among freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Banking and Finance (78%), and Automotive (56%).
The most common business areas among freelancers in Stuttgart, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Product Development (100%), and Project Management (78%).
Main locations of FRATCH Experts, who have recently used Jakarta EE
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 
Dusseldorf 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
