Jakarta Server Pages (JSP) Experts in Cologne
, matched in minutes from over 15,000 CVsHire experts who modernize JSP applications, develop server-rendered interfaces with Jakarta EE, and connect presentation layers to enterprise Java services. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts in Cologne, who have recently used Jakarta Server Pages (JSP)
Hooman B.
Last position:
Fullstack Developer at Möbel Roller GmbH
- Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
- Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
- Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
- Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
- Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
- Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
- Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
- Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
- Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
Allal K.
Last position:
Java Senior Full Stack Developer at Insurance ÖRAG
- Further development of a policy administration system (contract/claims) for the legal expenses insurer ÖRAG.
- My role: Senior Software Developer.
- The team consists of 12 developers.
- Technologies used: Java 8/21, Java EE, Quarkus, WebLogic, JPA, RabbitMQ, JTA, CI, CD, Jenkins, DB2, Maven, Jenkins, GIT (bitbucket) later GitLab, Junit, Elasticsearch, Mockito, Jira, SonarQube, Scrum, React, Workflow
- Migration and modernization of legacy systems: rewrote C and C++ code in Java to improve maintainability, scalability, and performance. Refactored Python into Java, including optimization and integration into modern architectures.
- Study on the use of AI (Codex) for implementing a Java feature. The goal is to compare the time spent and productivity of AI-supported development with a classic implementation by a developer. The results should show how strongly the use of AI affects development time and efficiency.
- Development of the following tariff calculators for the years 2024/2026: private, companies, doctors, farmers, owner-occupied G + H, landlords, traffic, club, top managers, sales representatives, special criminal law, savings bank, municipal, BayGT, doctors, Dehoga
Joaquim L.
Last position:
Freelance ABAP Developer, Logistics at Cheplapharm
- Tested integration of TIBCO EBX with SAP S/4HANA via TIBCO BusinessWorks – proof of concept
- Implemented use case: communication between TIBCO EBX and SAP S/4HANA via IDocs to exchange material master data and business partner data
- Customized, configured, and implemented inbound and outbound processing in the SAP S/4HANA environment for communication with the TIBCO EBX software interface
- Distributed classes, characteristics, and values between TIBCO BusinessWorks and SAP S/4HANA and customized the inbound processing
- Documented the technical components
Vladimir M.
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Peter B.
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Louis N.
Last position:
Specialist in Adobe Experience Manager & Microservices at Nguenkam Consulting & Engineering
Java 11/21
Springboot
Swagger/OpenApi
Azure Pipelines
Trivy Integration
Apache Sling
OSGI
Java Content Repository (JCR)
Apache Jackrabbit Oak
Adobe HTL
GraphQL
Maven
GitLab
IntelliJ
Azure Cloud
Azure DevOps
Terraform
AEM specialist in the Scrum team
Development and deployment of microservices via Open API interfaces
Operation of microservices in the Azure Cloud
Implementation of AEM modules and integration with microservices
Member of the knowledge transfer team and a backend coordination team
Ingo C.
Last position:
Founder, freelance CMS expert at CMS Consulting Cousin
- Freelance work as a CMS expert
Fatih K.
Last position:
Mobile App Developer at ING Belgium
- Part of a squad focused on intensive module development and integration
- Close collaboration with other squads and teams to integrate modules and essential components
- Use of SwiftUI and the Coordinator pattern to develop clean and understandable code
- Creative collaboration with UX designers in Figma and implementation in code
- Industry: Banking
- Project language: English
- Organizational form: Kanban
- Tools: Azure, Confluence, Figma, Teams
- Team size: 40 people
- Version control: Git, GitFlow, Azure
- App Store product: ING Banking
- Programming languages: SwiftUI, Swift
- Patterns: Coordinator, MVVM
- Swift Package Manager
- Localization: Yes
- Testing: XCTest, XCUITest
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
Andreas B.
Last position:
Senior Frontend Developer at Roadex
- Development of an app
- Technologies: React Native, Expo, SupaBase, TypeScript, GitHub, Trello
Last position:
Rewe Digital
- Creation of Spring Boot integration tests
- Creation of JUnit tests for the coupon system
- Creation of component tests for Kafka topics
- Creation of CI/CD pipeline scripts
- Creation of UI tests with Playwright
- Creation of UI tests with Cypress
- Review of developer unit tests
- Planning the test architecture for integration tests
- Creation of the test automation concept
- Evaluation and creation of test reports
Jacqueline K.
Last position:
OTTO
- Design, development, and monitoring of microservices
- Migrating functions from a monolithic system into separate microservices
- Designing and implementing new microservices (backend and frontend)
- Setting up and maintaining a CI/CD pipeline (GitHub Actions)
- Configuring cloud infrastructure with AWS CDK and Terraform
- Designing and implementing event-driven communication with AWS SNS/SQS and Apache Kafka
- Ensuring code quality through Test Driven Development (TDD), static code analysis, and Clean Code
Discover over 15,000 top freelancers
Statistics of experts using Jakarta Server Pages (JSP)
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 23 years)
Position duration
2.2 years
Positions per freelancer
12 (Germany: 15)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
83% (Germany: 88%)
Master's degree or higher
83% (Germany: 53%)
Doctorate
17% (Germany: 8%)
Certifications per freelancer
3 (Germany: 2)
Most common languages
German, English, French
Speak two or more languages
92% (Germany: 98%)
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 Cologne 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 Cologne using Jakarta Server Pages (JSP)
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 Server Pages (JSP) 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 (92%)
- Banking and Finance (58%)
- Insurance (58%)
- Transportation (42%)
- Retail (42%)
- Telecommunication (42%)
- Automotive (33%)
- Professional Services (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What JSP is
Jakarta Server Pages (JSP) is a server-side view technology for Java web applications. It combines HTML with expression language and tag libraries, allowing application data to be rendered into dynamic pages before the response reaches a browser. JSP was formerly known as JavaServer Pages and is now part of the Jakarta EE ecosystem.
Typical applications
JSP remains relevant in established enterprise systems and applications that need server-rendered interfaces, structured form handling, and close integration with Java services.
- Customer and employee portals
- Administration screens and reporting views
- Workflow forms connected to enterprise services
- Maintenance of monolithic Java web applications
Ecosystem and tooling
JSP specialists commonly work with Jakarta Servlet, Jakarta Standard Tag Library, Expression Language, and JavaServer Faces where component-based interfaces are appropriate. They may also use Spring MVC, Maven or Gradle, application servers such as Tomcat, Jetty, WildFly, or Payara, and relational databases accessed through JPA or JDBC. Secure session handling, MVC patterns, templating conventions, and automated testing are central to reliable delivery.
When expertise helps
Companies often bring in freelance JSP expertise when an older application must remain stable while its presentation layer is improved or its services are gradually separated. Specialists can trace request lifecycles, remove scriptlet-heavy code, fix rendering defects, and establish a practical migration path without disrupting business operations.
- A JSP application has recurring view or session errors
- The team needs help upgrading Jakarta EE dependencies
- A legacy Java web interface must connect to newer APIs
- Documentation and maintainable templates are missing
Working in Cologne
In Cologne, JSP expertise can support enterprise systems across sectors such as insurance, logistics, media, public services, and business software. Local teams may prefer on-site workshops for application handovers, while day-to-day implementation can often be coordinated remotely through version control, issue tracking, and clear release processes. German and English communication requirements should be agreed early.
Strong professional practice
Strong JSP professionals separate presentation from business logic, use tag libraries and expression language consistently, and understand the full servlet request lifecycle. They review escaping, authorization, caching, session behavior, and accessibility rather than treating a page as isolated markup. They also know when to improve JSP incrementally and when a different frontend or server-rendering approach is justified.
Frequently asked questions
Need clarity? These are the questions we hear most often about Jakarta Server Pages (JSP).
Jakarta Server Pages (JSP) is used to create dynamic, server-rendered web pages inside Java and Jakarta EE applications. It is common in portals, internal business systems, reporting interfaces, and established enterprise applications that render data on the server.
JSP renders HTML on the server and fits closely with servlet-based Java applications, while frameworks such as React or Angular usually create richer browser-side interfaces. JSP can be simpler for form-heavy systems and incremental maintenance, but a separate frontend may suit highly interactive products better.
A strong Jakarta Server Pages specialist usually understands Jakarta Servlet, Expression Language, Jakarta Standard Tag Library, MVC design, and application servers such as Tomcat or WildFly. Experience with Spring MVC, REST services, Maven or Gradle, SQL, security, and automated testing is also valuable.
The right level depends on the system’s age, integration depth, and release risk rather than on the page count. A small template change may need focused JSP knowledge, while a migration or production stabilization calls for a professional who can diagnose servlet lifecycles, dependencies, sessions, security, and deployment behavior.
JSP work can often be completed remotely when the codebase, environments, and deployment process are accessible. Cologne teams may still benefit from on-site workshops for legacy-system discovery or handover, with German or English collaboration agreed at the start.
Retaining JavaServer Pages can be sensible when the application is stable, business-critical, and tightly integrated with Java services. Replacement becomes more attractive when the interface needs extensive browser-side interaction, the templates are difficult to maintain, or the current stack blocks planned product changes.
Review whether the professional keeps business logic out of views, uses safe output escaping, handles authorization correctly, and explains the request flow clearly. Good work also includes readable templates, tests for important rendering paths, reliable deployment notes, and evidence that performance and accessibility were considered.
A Jakarta Server Pages freelancer should clarify the Jakarta EE or Java version, application server, build system, template conventions, deployment model, and current testing coverage. They should also ask whether the goal is maintenance, modernization, migration, or new server-rendered functionality, since each requires a different delivery plan.
The average hourly rate of freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects is 98 €, which corresponds to a daily rate of about 786 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects, 83% hold at least a Bachelor's degree, 83% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects are German (100%), English (92%), and French (42%).
The most common industries among freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects are Information Technology (92%), Banking and Finance (58%), and Insurance (58%).
The most common business areas among freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects are Information Technology (100%), Product Development (83%), and Quality Assurance (75%).
Main locations of FRATCH Experts, who have recently used Jakarta Server Pages (JSP)
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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