Mockito Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used Mockito
Hooman Behmanesh
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.
Hamdi Rajab
Last position:
Full-Stack AI Developer at Karray-Pflege GmbH
PFS-Matching-App
- Integrated an intelligent LLM chatbot using LangChain4j, enabling conversational AI, context-aware question answering, document summarization, and autonomous tool execution.
- Implemented Retrieval-Augmented Generation (RAG), prompt engineering, and AI agent workflows to connect large language models with enterprise data and backend services.
- Developed RESTful APIs and secure backend services to support AI-driven interactions and business processes
Thomas Pawlitzki
Last position:
Freelance Software Architect at Self-employed
Markus Glagla
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 Gezer
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 Maznicenko
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 Nguenkam
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
Allal Kharaz
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
Jacqueline Krech
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 Mockito
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
1.7 years (Germany: 1.8 years)
Positions per freelancer
12 (Germany: 13)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Retail
Certification focus areas
Information Technology, Product Development, Marketing
Bachelor's degree or higher
100% (Germany: 96%)
Master's degree or higher
100% (Germany: 60%)
Doctorate
29% (Germany: 11%)
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 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 Mockito
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
Mockito basics
Mockito is a Java test library for creating mocks, stubs, and spies. It helps teams test services in isolation, especially when code depends on databases, web clients, queues, or legacy APIs. Many search for it as Mockito framework or simply Mockito.
Typical use cases
- Unit tests for service logic
- Mocking repository, client, and gateway calls
- Verifying interactions and call order
- Testing Spring-based applications
- Safely covering legacy code
Strong professionals use Mockito to make tests focused and readable. They know when to mock and when to prefer a real test double or a slice test.
Ecosystem fit
Mockito is used with JUnit, especially JUnit 5, and often with Spring Boot test support. It fits Java projects that need fast feedback without starting full systems. Good specialists also understand assertions, fixtures, and test design.
What companies need
Companies bring in freelance expertise when test suites become brittle, slow, or hard to extend. The right specialist can improve mocking patterns, reduce overuse of spies, and clean up tests around services, controllers, and integration boundaries. In Cologne, this is often useful for teams that want local collaboration but still work well with remote experts.
What strong specialists do
A strong Mockito specialist writes tests that describe behavior, not implementation noise. They keep mocks simple, avoid overspecification, and structure code so tests stay stable as the system changes. They also spot design issues that make code hard to test in the first place.
Signs you need help
- Tests fail after small code changes
- Mock setup is duplicated across files
- Teams rely on too many deep stubs or spies
- New features are hard to cover with unit tests
- Review comments keep coming back to test quality
If your Java project uses Mockito with Spring Boot, a specialist can help standardize patterns and improve maintainability. That is useful for both remote delivery and on-site sessions with Cologne-based teams.
Frequently asked questions
Quick answers to the questions that come up most around Mockito.
Mockito is used to isolate code under test by replacing dependencies with mocks, stubs, or spies. That makes it easier to verify service logic, error handling, and interaction with external systems without calling the real dependency.
Use Mockito when you want fast unit tests around one class or service and the dependency is not the focus of the test. If you need to prove that the full stack works together, an integration test is usually the better choice.
Mockito is usually preferred for readable tests and a gentle API. Compared with EasyMock, it often feels less strict; compared with JMockit, it is typically simpler to adopt in standard Java teams.
A strong Mockito specialist should also know JUnit, assertion libraries, and basic test design. In Spring projects, Spring Boot test support and an understanding of dependency injection matter as well.
You do not need a large rewrite before asking for help with Mockito. A specialist can add value when tests are hard to read, when mocks are scattered through the codebase, or when teams are unsure how to structure new tests cleanly.
Yes, Mockito work is often a good fit for remote collaboration because the main deliverable is code and test design. If a Cologne team wants in-person workshops, that can help align naming, structure, and review standards, but it is not required.
Look for tests that are clear, stable, and easy to maintain, not just tests that pass. A strong Mockito professional avoids excessive mocking, uses verification only where it adds value, and explains trade-offs in plain language.
With Mockito, problems often show up as tests that mirror implementation details too closely, brittle stubbing, or confusing spy usage. Those patterns make refactoring harder and usually mean the test structure needs a reset.
The average hourly rate of freelancers in Cologne, Germany who have used Mockito in their recent projects is 94 €, which corresponds to a daily rate of about 750 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Mockito in their recent projects, 100% hold at least a Bachelor's degree, 100% hold at least a Master's degree, and 29% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Mockito in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Cologne, Germany who have used Mockito in their recent projects are German (100%), English (100%), and French (44%).
The most common industries among freelancers in Cologne, Germany who have used Mockito in their recent projects are Information Technology (78%), Automotive (56%), and Retail (56%).
The most common business areas among freelancers in Cologne, Germany who have used Mockito in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used Mockito
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 
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FRATCH CEO
