
Jakarta Server Pages (JSP) Experts in Cologne
, matched with vetted professionals in minutesHire experts who maintain JSP views, modernize Java web applications, connect server-side pages to Jakarta EE services, and improve legacy interfaces. FRATCH finds the right vetted and available freelancer through fast, precise AI matching.
Meet FRATCH Experts in Cologne, who have recently used Jakarta Server Pages (JSP)
Andreas B.
Last position:
Senior Software Developer at ELIONOVA AG
- Created an application to control measurement hardware with a Tauri application using React.JS and TypeScript on Raspberry Pi
- Developed a cloud application for storing and analyzing measurement results using Spring Boot and React.JS
- Built a Tauri application for printing ZPL labels on Windows
- Technologies: Java, JavaScript, Tauri, Rust, React.JS, AWS, Kubernetes, Docker, GitLab CI/CD, REST API (JSON), Maven, CI/CD, PostgreSQL
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
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
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
21 years (Germany: 23 years)

Position duration
2.5 years (Germany: 2.2 years)

Positions per freelancer
12 (Germany: 16)

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
100% (Germany: 99%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging 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 29 Oct 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 (91%)
- Banking and Finance (64%)
- Insurance (64%)
- Retail (45%)
- Telecommunication (45%)
- Automotive (36%)
- Transportation (36%)
- Healthcare (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
JSP at a glance
Jakarta Server Pages, commonly called JSP, is a server-side Java technology for generating dynamic HTML and other web responses. A JSP page combines markup with expression language, tag libraries and reusable components, while the application server processes it into a servlet. The technology is now part of Jakarta EE; older projects often refer to the same approach as JavaServer Pages.
Applications and systems
JSP appears in established business applications where server-rendered pages connect users with Java services, databases and enterprise workflows. Typical work includes:
- Customer portals, internal administration screens and reporting interfaces
- Forms, dashboards and document-driven business processes
- Migration of JavaServer Pages applications to Jakarta EE namespaces
- Integration with authentication, transactions and persistence layers
Ecosystem and tooling
Strong JSP specialists understand the surrounding Java web stack, not only page syntax. Their toolkit may include Jakarta Servlet, Jakarta Standard Tag Library, Expression Language, Spring MVC, Maven, Gradle, application servers and relational databases. They also work with templating conventions, reusable tag files, session handling and browser-facing accessibility.
When companies need expertise
Freelance support is useful when a long-running JSP application needs controlled change without disrupting business operations. Companies often seek specialists for a release backlog, a framework migration, performance work or a structured frontend refresh. In Cologne, this can support local enterprise teams while keeping delivery remote, hybrid or on-site according to security and collaboration needs.
Quality signals
A capable professional separates presentation from business logic and replaces scriptlets with maintainable tag libraries or expression language where practical. They test rendered output, validation, session behavior and authorization, while tracing requests across servlets, services and databases. Good specialists document deployment assumptions and make incremental changes that suit the application’s age and risk profile.
Choosing a specialist
Look for evidence of hands-on work with the application server, build process and Java version used in the project. Ask how the professional would assess a JSP codebase, plan a Jakarta EE migration or diagnose slow page rendering. Experience with automated tests, secure output encoding, accessibility and legacy modernization is often more valuable than familiarity with page templates alone.
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 server-rendered web pages in Java applications. It is common in portals, administration tools, forms, reports and enterprise workflows that need direct access to Java services and session-based business logic.
JSP renders HTML on the server, which can simplify deployment and integrate closely with Jakarta EE services. Single-page applications and component-based frontend frameworks move more work to the browser, so the right choice depends on existing architecture, interaction needs, team skills and migration risk.
A strong Jakarta Server Pages specialist should understand Jakarta Servlet, Expression Language, Jakarta Standard Tag Library, HTTP, HTML, CSS, JavaScript and relational databases. Experience with Spring MVC, Maven or Gradle and an application server is also valuable for maintaining the full delivery path.
JSP expertise matters when a company is modernizing a legacy Java web application, migrating from javax to jakarta namespaces, resolving rendering or performance issues, or adding features to a critical portal. The required depth depends on code quality, integration complexity and the consequences of downtime.
Jakarta Server Pages (JSP) work is often suitable for remote collaboration through source control, secure environments and shared delivery processes. Cologne companies may choose remote or hybrid support, while on-site work can be useful for restricted systems, workshops or close coordination with local stakeholders. German and English communication should be agreed early.
A JSP professional should first inspect the deployment environment, page structure, tag libraries, servlet mappings, build pipeline and connections to services or databases. They should also identify scriptlets, duplicated presentation logic, security gaps and fragile session handling before proposing changes.
A reliable JavaServer Pages specialist produces readable views, keeps business rules out of templates and adds tests around important user flows. Review the handling of authorization, output encoding, validation, accessibility, errors and browser behavior, then check whether the changes are documented and deployable through the existing process.
Jakarta Server Pages (JSP) remains relevant where established Java applications depend on server-rendered views and stable enterprise integrations. It may not be the best choice for every new interface, but skilled professionals can maintain it safely, connect it to modern services and plan a gradual replacement when that delivers clear value.
The average hourly rate of freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects is 95 €, which corresponds to a daily rate of about 760 € 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 21 years of professional experience, with a single engagement typically lasting around 2.5 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 (100%), and French (45%).
The most common industries among freelancers in Cologne, Germany who have used Jakarta Server Pages (JSP) in their recent projects are Information Technology (91%), Banking and Finance (64%), and Insurance (64%).
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 (82%), and Quality Assurance (73%).
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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Munich