Spring Framework Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used Spring Framework
Predrag P.
Last position:
Test Developer | Test Automation Engineer at CreditReform
Technologies: Java 25, Selenium, Insomnia, SSO, Gitlab, Jenkins, Docker, Kubernetes, Jira, IntelliJ, Nexus, Oracle, MariaDB, SpringBoot, Grafana, Concept Board, Vue.js, OpenApi, Kotlin. Implementation, maintenance, and enhancement of automated end-to-end regression tests for UI and API interfaces. Appropriate and targeted test automation involving multiple software products, including Java-based Windows applications. Automation of business processes with Selenium, reset jobs, and DB import jobs, as well as creation of test concepts, test case descriptions, and structured defect reporting.
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
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
Markus G.
Last position:
Full Stack Developer at REWE Digital
- A warehouse valuation system was reimplemented using Java, Spring Boot, and Camunda. The backend solution focuses on integration and batch calculations, the frontend on managing formulas and reviewing results.
- Java 21
- Spring Boot
- JPA
- Maven
- REST
- Kafka
- PostgreSQL
- DB2
- Liquibase
- Google Cloud Storage
- Keycloak
- GitLab CI/CD
- Helm
- Terragrunt
- SonarQube
- Angular
- IntelliJ
- JUnit 5
- Mockito
- Open API
Ayhan G.
Last position:
Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital
Consulting, designing, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Developing, implementing, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration tests and end-to-end tests Establishing a maintainable test architecture with low entry barriers to simplify the creation of automated tests Some tools and technologies used: JUnit, RestAssured, Testcontainers, Kubedock, Appium, Android emulator, Jira Xray, Mockito, WireMock, Spring Framework, Kotlin
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
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
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
Discover over 15,000 top freelancers
Statistics of experts using Spring Framework
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 18 years)
Position duration
1.9 years (Germany: 2.1 years)
Positions per freelancer
13 (Germany: 12)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Retail
Certification focus areas
Information Technology, Product Development, Marketing
Bachelor's degree or higher
100% (Germany: 95%)
Master's degree or higher
83% (Germany: 55%)
Doctorate
17% (Germany: 9%)
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 95%)
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 Spring Framework
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.
Spring Framework 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 (88%)
- Banking and Finance (75%)
- Retail (63%)
- Automotive (50%)
- Healthcare (50%)
- Transportation (50%)
- Government and Administration (50%)
- Telecommunication (50%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Spring Framework does
Spring Framework is a Java application framework for building modular, testable and maintainable backend systems. Its core container manages application components and their dependencies, while modules support web applications, data access, transactions, messaging and security. Teams use it for business platforms, APIs, integration services and internal applications.
Core ecosystem
Spring is an ecosystem rather than a single library. Strong specialists understand how its projects fit together:
- Spring Boot for application setup, configuration and production readiness
- Spring MVC and WebFlux for web APIs and reactive services
- Spring Data for persistence across relational and NoSQL databases
- Spring Security for authentication, authorization and identity integration
- Spring Cloud for distributed systems and service configuration
Typical project work
Spring professionals deliver features across the full service lifecycle. They structure domain logic, expose REST or messaging interfaces, integrate external systems and prepare applications for reliable operation. Their work may include database migrations, transaction boundaries, automated tests, observability and deployment configuration.
When companies need specialists
Freelance expertise is useful when an internal team must modernize a Java system, add a service without slowing existing work or resolve design issues in a growing codebase. It also helps when a company needs focused support for:
- Moving a legacy application toward Spring Boot
- Designing secure APIs and service integrations
- Improving test coverage, performance or maintainability
- Connecting Kafka, databases, identity providers or cloud services
Skills that matter
A capable Spring specialist combines framework knowledge with sound Java practice. They should be comfortable with dependency injection, configuration management, HTTP, SQL, transactions, concurrency and automated testing. Experience with Maven or Gradle, Git, containers, CI pipelines and observability tools makes their solutions easier to operate. Clear boundaries between business logic and framework code are a strong quality signal.
Working in Cologne
Companies in Cologne can use Spring expertise across commerce, media, logistics, insurance and other enterprise environments. On-site collaboration can help with architecture workshops or complex integration planning, while remote work suits implementation, testing and code review. German or English communication should be agreed early, especially when specialists work with product, operations and compliance teams.
Frequently asked questions
Curious about Spring Framework? Here are the answers that come up again and again.
Spring Framework is used to build Java web applications, REST APIs, integration services and enterprise backends. Its dependency injection and modular design help teams keep business logic testable and easier to maintain.
Spring Framework and Jakarta EE both support enterprise Java applications, but they offer different programming models and ecosystem conventions. Spring is often chosen for its broad project ecosystem and flexible integration options, while Jakarta EE can suit teams aligned with standardized enterprise specifications.
Spring Boot is part of the wider Spring ecosystem and builds on Spring Framework. It simplifies setup, configuration and deployment so specialists can start production-oriented services with less manual wiring.
Spring Framework work usually benefits from strong Java, SQL, HTTP and testing skills. Depending on the system, companies may also need experience with Kafka, Docker, Kubernetes, cloud services, CI pipelines, OAuth or OpenID Connect.
Spring Framework projects need a specialist who has handled the same level of architectural and operational complexity, not simply someone familiar with annotations. A small API may need focused implementation support, while a distributed enterprise system calls for experience with transactions, security, observability and integration boundaries.
Spring Framework work is well suited to remote collaboration through version control, issue tracking, code review and automated delivery pipelines. Cologne-based teams should define meeting practices, access requirements and whether German, English or both are needed for workshops and documentation.
Ask how the specialist would structure modules, manage configuration, handle failures and test business-critical paths in Spring Framework. A strong answer connects framework choices to maintainability, security and operational needs instead of listing annotations or isolated tools.
Spring Framework is a strong fit when an application needs mature support for security, data access, transactions, messaging and enterprise integrations. A lighter framework may be preferable for a narrowly scoped service with minimal dependencies, but the decision should follow the system’s constraints and the team’s existing Java expertise.
The average hourly rate of freelancers in Cologne, Germany who have used Spring Framework in their recent projects is 88 €, which corresponds to a daily rate of about 706 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Spring Framework in their recent projects, 100% 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 Spring Framework in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Cologne, Germany who have used Spring Framework in their recent projects are German (100%), English (100%), and French (50%).
The most common industries among freelancers in Cologne, Germany who have used Spring Framework in their recent projects are Information Technology (88%), Banking and Finance (75%), and Retail (63%).
The most common business areas among freelancers in Cologne, Germany who have used Spring Framework in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (63%).
Main locations of FRATCH Experts, who have recently used Spring Framework
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 Request a free demo
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FRATCH CEO
