Jakarta EE Experts in Düsseldorf
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Meet FRATCH Experts in Düsseldorf, who have recently used Jakarta EE
Marc S.
Last position:
Fullstack Developer at PLANT-MY-TREE
PLANT-MY-TREE®-per-order
The application enables Shopify merchants to automatically place tree-planting orders for every incoming order. By integrating ecological contributions directly into the purchase process, the manual effort for tracking and billing reforestation initiatives is eliminated. The system increases transparency for end customers through real-time visualizations of the ecological impact directly in the storefront. The architecture is based on a modular monolith with Spring Boot in the backend and an integrated React app inside the Shopify admin area. The solution uses webhooks to capture order data in an event-driven way and integrates the weclapp ERP system for automated monthly invoicing. An app proxy mechanism provides dynamic statistics such as CO2 compensation and planted trees without any performance loss for the merchant shop.
Tasks:
- Design of the modular software architecture based on Spring Modulith to ensure high maintainability
- Development of the event-driven business logic for evaluating Shopify orders via webhooks
- Implementation of automated invoicing by connecting the weclapp REST API
- Building the frontend using React Router and Shopify App Bridge for native integration
- Design of the database model and implementation of the persistence layer with JPA/Hibernate and Prisma
- Integration of internationalization processes for global use in the frontend and email communication
- Automation of deployment processes using Docker and GitLab CI/CD
Project skills: Java 25, Spring Boot, Spring Security, Spring Modulith, Hibernate, JPA, REST API, PostgreSQL, Maven, Liquibase, React, TypeScript, React Router, Vite, Node.js, Prisma, Zod, Docker, Docker Compose, GitLab CI/CD, Shopify CLI, Shopify App Bridge, Polaris, weclapp, i18next, Lombok, Vitest
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.
Stanislaus S.
Last position:
Security Consultant at Rohde & Schwarz AG at Star Labs GmbH
- Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
- Developed and audited Linux drivers
- Collaborated using GitLab, Gerrit, Confluence and Jira
- Technologies: C, C++, Secure Boot
Adnan K.
Last position:
Chief Information Officer at ARLANXEO Deutschland GmbH
- Executed post-carve-out stabilization, system consolidation and cybersecurity uplift. Re-assessed system landscape and assets and designed new IT strategy for future. Implemented new IT operating model focusing on product-centric organization and re-internalization of critical resources.
- Successfully designed new IT operating model of the company, based on massive reduction of external dependencies, insourcing of key positions and upskilling of employees.
- Massive reduction of IT cost in the first three years (-40m$), bringing IT spend level below Gartner industry benchmark (1.27%).
- Introduced new product-centric organization based on fusion teams between business and IT across the company.
- Administered implementation of corporate-wide IT/OT cybersecurity program with more than 60 projects.
- Continuous improvement of enterprise IT/OT cybersecurity maturity level with significant increase in the first two years (CMMI >3.5, C2M2 >2.5).
- Governed successful implementation of the business transformation program within IT area by overachieving the savings target by $8m.
- Initiated and created new cloud-based data management platform based on best-in-class technology.
- Implemented first company-wide Microsoft Copilot AI program based on various business cases, leveraging GenAI and AgenticAI.
Rishu K.
Last position:
Java Technical Lead (Agile Developer) at Accenture
- Led the development of robust, scalable, and high-performance micro-services architecture.
- Migrated legacy monolith systems to Spring Boot with RESTful APIs.
- Designed, implemented, deployed, tested, and optimized scalable backend systems ensuring high availability and performance.
- Maintained and deployed Dockerized applications on Kubernetes integrated into CI/CD pipelines.
- Collaborated with cross-functional teams, including frontend developers, product managers, and designers, to translate business requirements into scalable and efficient backend solutions.
- Mentored team members and contributed meaningful code reviews.
Jacqueline H.
Last position:
Kitchen Appliance Manufacturer
Setting up and enhancing an international subscription management system
Migrating and decommissioning a Hybris-SAP system and integrating Zuora
Implementing numerous interfaces to various systems (external and internal)
Setting up and improving monitoring with Grafana, Prometheus, and Databricks
Introducing logging with Loki
Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python
Adjusting and extending the GitLab CI pipelines
Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS
Setting up and running E2E and performance tests
Expanding the Databricks business intelligence solution to provide various KPIs
Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)
Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks
Bernhard D.
Last position:
Enterprise Architect. And responsible for the cross-functional architecture as well as all domains with a focus on the sales at Süddeutsche Krankenversicherung
Creation of business and technical concepts as well as support for enterprise architecture management as part of the migration to the Adesso standard insurance solutions and the renewal of surrounding systems
Interface definitions
Business analysis and creation of the business concepts for input management and sales
Creation of architecture guidelines and processes
Processing technical and business decisions in the architecture board
Definition of service processes and system management aspects
Creation of the technical target operating model
Creation of an integration architecture for AI/LLMs from the providers Commasoft and Insiders
CommaSoft (Alan) webpages and web services
Insiders for Smartfix based on web services
Creation of a question catalog for a security/regulatory check.
Analysis of threats using threat modeling / STRIDE incl. creation of a set of measures to secure the systems
System environment: Jira, Confluence, Java, Enterprise Architect, VAIT/DORA, KritisV, GDPR, IT ServiceMgmt, Adesso Ecosphere and Insure Health, DoPIX and successor product, SmartFix, SmartFlow, Zabas, Kolumbus, Clarc archive, BiPRO, AI / LLM, MS Azure, AWS, TOM/FMO
Discover over 15,000 top freelancers
Statistics of experts using Jakarta EE
Aggregated from the professional profiles of matched freelancers.
Experience
15 years (Germany: 23 years)
Position duration
1.4 years (Germany: 2.2 years)
Positions per freelancer
11 (Germany: 15)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Project Management, Information Technology, Product Development
Bachelor's degree or higher
100% (Germany: 92%)
Master's degree or higher
33% (Germany: 53%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 96%)
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 Düsseldorf 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 Jakarta EE rate benchmarks:
Explore rate insightsAverage rates of experts in Düsseldorf 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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Jakarta EE 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 (100%)
- Banking and Finance (71%)
- Manufacturing (57%)
- Retail (43%)
- Healthcare (29%)
- Insurance (29%)
- Professional Services (29%)
- Telecommunication (29%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Enterprise Java foundation
Jakarta EE is the standard enterprise platform for building secure, scalable Java applications. It provides specifications for web services, dependency injection, persistence, transactions, messaging, and application security. The platform is suited to systems that need clear contracts, long-term support, and reliable integration with business processes.
Applications and services
Companies use Jakarta EE for customer portals, internal systems, payment services, logistics applications, and public-sector platforms. Its APIs support modular services that connect databases, identity providers, queues, and external systems. The platform can run as a traditional monolith or as part of a service-oriented architecture.
- Enterprise web applications and REST APIs
- Transaction-heavy business services
- Integration layers for legacy and modern systems
- Secure portals and workflow platforms
Ecosystem and tooling
Jakarta EE specialists work with application runtimes such as WildFly, Payara, Open Liberty, and Eclipse GlassFish. Common skills include CDI, JAX-RS, JPA, Jakarta Persistence, Jakarta Transactions, and Jakarta Security. They also use Maven or Gradle, relational databases, messaging systems, containers, and automated delivery pipelines.
When to bring in expertise
Freelance expertise helps when a team is modernising Java EE applications, moving from legacy namespaces, or introducing a new Jakarta EE runtime. Specialists can define service boundaries, plan migration work, improve test coverage, and resolve production issues. They are also useful when internal teams need focused support without committing to a permanent role.
- Migrating from Java EE to Jakarta EE
- Upgrading runtimes and application dependencies
- Improving security, transactions, or persistence
- Connecting enterprise services to cloud infrastructure
What strong specialists deliver
Strong professionals understand both the specifications and the runtime behaviour behind them. They make sound choices about transactions, persistence contexts, API design, concurrency, and service boundaries. They document decisions, create maintainable tests, and investigate performance or deployment problems with evidence rather than guesswork.
Collaboration in Düsseldorf
Düsseldorf companies often need Jakarta EE expertise for industrial, financial, logistics, retail, and public-sector systems. A freelancer may work remotely, on site, or in a hybrid setup with local product and operations teams. Clear communication in English or German, practical documentation, and overlap with the team’s working hours can make delivery smoother.
Frequently asked questions
Key details about Jakarta EE, drawn from the questions we get asked most.
Jakarta EE is used to build secure enterprise applications and services on the Java platform. It supports REST APIs, web interfaces, persistence, transactions, messaging, dependency injection, and application security. Typical systems include portals, workflow tools, integration services, and transaction-heavy business applications.
Jakarta EE provides standardised enterprise specifications implemented by runtimes such as WildFly, Payara, and Open Liberty. Spring Boot offers a broad application framework with strong conventions and a large surrounding ecosystem. The right choice depends on existing systems, runtime preferences, team skills, portability needs, and the level of platform standardisation required.
Jakarta EE work commonly involves Java, Maven or Gradle, relational databases, JPA, REST, messaging, containerisation, and automated delivery pipelines. Experience with identity providers, observability, cloud infrastructure, and application runtime operations is also valuable. For modernisation work, knowledge of legacy Java EE namespaces and migration tooling can be essential.
Jakarta EE projects vary widely in complexity, so the relevant evidence is not a fixed number of years. A specialist should show comparable work involving the same runtime, persistence model, security requirements, integration patterns, and deployment environment. For a migration, ask for examples of namespace changes, dependency upgrades, testing, and production rollout planning.
Jakarta EE projects are often suitable for remote collaboration because source code, pipelines, runtime configuration, and technical documentation can be shared digitally. On-site sessions may still help with domain discovery, architecture workshops, or access to controlled environments. Agree on communication language, working-hour overlap, and security procedures before delivery begins.
Jakarta EE quality is visible in clear service boundaries, reliable transaction handling, secure configuration, useful tests, and practical documentation. Ask the specialist to explain a relevant architecture decision and how they diagnosed a production issue. Strong answers connect technical choices to reliability, maintainability, and business constraints.
Jakarta EE can support both modular monoliths and distributed services. Its APIs can be used to expose REST endpoints, consume messages, manage persistence, and enforce security within different deployment designs. The architecture should follow operational and domain needs rather than splitting a system into services by default.
Jakarta EE uses the newer jakarta namespace, while older Java EE applications commonly use javax. The change can affect imports, dependencies, application servers, libraries, build files, and deployment configuration. A careful migration checks specification compatibility, third-party support, automated tests, and runtime behaviour before production release.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects is 109 €, which corresponds to a daily rate of about 871 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects, 100% hold at least a Bachelor's degree and 33% hold at least a Master's degree.
On average, freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.4 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects are German (100%), English (100%), and French (29%).
The most common industries among freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Banking and Finance (71%), and Manufacturing (57%).
The most common business areas among freelancers in Dusseldorf, Germany who have used Jakarta EE in their recent projects are Information Technology (100%), Product Development (86%), and Operations (71%).
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.
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Hamburg 
Munich 
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Frankfurt 
Stuttgart 
Nuremberg Request a free demo
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