REST Assured Experts in Germany
matched in minutes with vetted, available specialistsHire experts who create reliable Java API tests with REST Assured, integrate them into JUnit or TestNG pipelines, and validate complex REST responses, authentication flows and contract rules. FRATCH connects you with precisely matched, vetted and available freelancers fast.
Meet FRATCH Experts in Germany, who have recently used REST Assured
Marcus B.
Last position:
Java and Quarkus Expert at Large German energy service provider
- Modernization of a large-scale Java enterprise application*
The project is modernizing a complex enterprise application that has grown over many years. The existing Spring-based legacy system runs on Java 8, OSGi, and Eclipse RCP and is being gradually migrated to a modern, maintainable architecture with Java 25 and Quarkus.
Marcus works on analysis, architecture, refactoring, and implementation. One focus is on untangling historically grown structures and dependencies and on building a clean, sustainable Java and Quarkus technology stack.
Tools & technologies: Java 8, Java 25, Quarkus, Hibernate ORM with Panache, EclipseLink, OSGi, Eclipse RCP, Maven, JUnit, Mockito, REST, JSON, Git, Eclipse IDE, IntelliJ IDEA Ultimate, Jira, Confluence
Daniel S.
Last position:
Senior Software Engineer at energielenker solutions GmbH
- Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
- Defined time-based and dependency-based jobs
- Deployed to managed Kubernetes clusters using Helm
- Integrated InfluxDB Cloud
- Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
- Developed dashboards and visualizations in Grafana
- Developed unit tests with mocking using pytest
- Set up a CI/CD pipeline in GitLab
Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud
Mohsin H.
Last position:
BBM GenAI MiDAS program coordinator for Bosch eBike at Robert Bosch GmbH
The MiDAS program aims to integrate Generative AI across the entire BBM organization. My role is to enable the eBike division to adopt and leverage Generative AI by collaborating closely with the MiDAS team in India.
Management:
- Enable the eBike division to adopt GenAI through tailored solutions.
- Collaborate with the MiDAS team in India to design solutions for Generative AI use cases specific to the eBike division.
- Coordinate with the eBike teams to integrate GenAI systems, tools, plugins, and services provided by the MiDAS team.
- Plan roadmaps with eBike and MiDAS India team Product Managers for the delivery and integration of Generative AI solutions.
Mariam A.
Last position:
Software Test Engineer at Sonnen Egypt
Tymofii S.
Last position:
Senior Backend Developer at Medavis
- Developed backend features for Modern RIS, a web-based Radiology Information System integrated with the existing Classic RIS via WebView.
- Worked on a modular Spring Boot backend covering clinical workflows such as appointments, examinations, patients, orders, reporting, billing, and inventory.
- Contributed to event-driven architecture using domain events to decouple workflows across backend modules.
- Implemented REST/OpenAPI endpoints, service-layer business logic, DTO mapping, validation, and integration points for the React frontend.
- Worked with PostgreSQL-backed domain models, Liquibase database changes, read/write model separation, and legacy RIS database structures.
- Integrated authentication and authorization flows using Keycloak and OAuth2.
- Added and maintained unit/integration tests using JUnit, Rest Assured, Testcontainers, and project-specific test utilities.
- Supported CI/CD and local development workflows using Maven, Docker Compose, Jenkins, and generated OpenAPI clients.
Tech stack: Java 21, Spring Boot 3.5, Maven, PostgreSQL, Liquibase, Keycloak, OAuth2, REST, OpenAPI/Springdoc, MapStruct, Lombok, Docker, Testcontainers, Jenkins.
Ingo D.
Last position:
Analytics at BaFin - Federal Financial Supervisory Authority Frankfurt
- Introduction of methods for developing and automated deployment of cloud-native software and machine learning applications in OpenShift clusters
- Development of various programs in Python
- Technologies: Kubernetes, OpenShift, Kustomize, ArgoCD, Tekton, Docker, PodMan, Airflow, IntelliJ, PyCharm, Git, Bitbucket, Jira, Confluence, Python
Niels M.
Last position:
Senior Software Developer / Cloud Architect at Biesterfeld SE
- Architected ETL services for event-driven data exchange between enterprise systems on a Kafka streaming backbone.
- Optimized CI/CD pipelines for Azure AKS deployments and improved OpenSearch monitoring and alerting for proactive incident detection.
Tech: Java / Kotlin, Quarkus, Kafka / Avro, Azure / AKS, Azure Storage Container, ArgoCD, GitLab CI, OpenSearch, Terraform
Vitor R.
Last position:
Test Coordinator Automation at Pro4all
- Designed and built from scratch the automation framework using Playwright, Typescript, JavaScript, Gherkin, Cucumber, BDD, Maven, IntelliJ IDEA
- Defined, developed and maintained test plans, test scripts, reports and other QA documentation in Confluence
- Created and maintained test data with SQL Server Management Studio, Toad and Faker.js
- Performed web services and API testing using Swagger Open API, SoapUI, JSON, HTML and XML
- Executed functional, smoke, regression, black box, GUI, cross-browser, UAT and E2E testing using CrossBrowserTesting and Safari Web Inspector
- Integrated and maintained automated scripts within sprints following Kanban, CI/CD, GitHub, Docker, Azure Pipelines, Agile, Scrum, Kafka and Kibana
- Raised and managed defects in Azure DevOps
- Conducted mobile testing with Robot Framework and Appium
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
Martin G.
Last position:
SAP Test Data Management Consultant at Siemens AG
End-to-end quality assurance in a global S/4HANA transformation program.
Automated test data setup, evaluation of search and generation solutions, and PoC execution (K2View, EPI-USE).
Coordination between Siemens teams and external partners, and structured knowledge transfer to internal stakeholders.
Created a basis for PoC decisions and sped up tool selection.
Standardized test data provisioning and noticeably reduced lead times.
Established governance for test data processes (policies, roles, KPIs).
Sustainable know-how transfer: empowered internal teams to operate solutions on their own.
Methods & technologies: S/4HANA, SAP, K2View, EPI-USE, test data management, data masking, data provisioning, test strategy, test management, coaching & enablement, Azure DevOps, Microsoft Office 365, Gemini.
Mangal M.
Last position:
Trainee Product Management at Digitale Leute Schule
- Remote learning with experts and 636 instructional units.
- Product management bootcamp teaching agile methods and software tools for modern product management in complex software projects.
- User experience (UX) · product management · Figma (software) · user-centered design · Scrum · agile project management · Jira · Confluence · product discovery · backlog management · user experience design (UED) · prototyping · lean thinking · product roadmapping · user stories · Miro collaboration platform · application monitoring tools · performance metrics · lean product management · product design kickoff indicators (KPI) & tracking events · product strategy · business modeling · product vision & goals · product discovery.
Anastasiya Z.
Last position:
Test Automation Engineer, Test Analyst
- Built a complete test automation solution from scratch for a distributed microservice architecture (backend and frontend)
- Developed automated tests in Kotlin, focusing on integration and end-to-end tests
- Derived, specified, and automated test cases for functional and technical requirements
- Designed a test strategy to ensure test coverage with high data complexity
- Implemented a reusable regression test architecture
- Integrated tests into CI/CD pipelines
- Supported the design and development of test data generators to enable reproducible and realistic test scenarios
- Trained and advised teams on the new test architecture and best practices in test automation
- Worked closely with developers, DevOps, and business teams to ensure a stable and maintainable test infrastructure
Marcel S.
Last position:
Lead Developer / Software Architect at Rezeptprüfstelle Duderstadt GmbH
Responsible for the new development of billing and auditing software for prescriptions (prescriptions) to fully check and evaluate e-prescriptions for correctness (content, billing)
The system consists of several contexts that run as services (Docker containers):
Checking and processing data deliveries via FTP and email
Managing invoices, clearings, advance payments and deductions
Managing and running audit rules and audit folders
Evaluations based on Metabase
Developer Stack: Kotlin, Vue 3 / Vuetify 3, ANTLR, Spring Boot 3, REST API, Gradle, Docker, GitLab, PostgreSQL, Kafka, Keycloak, Scrum, Grafana, Loki, Testcontainers, Prometheus
Musa M.
Last position:
Qa Engineer at TD Bank
- Designed and implemented an automation test framework using Junit and Maven, developing BDD scripts with Cucumber and reusable methods for application behavior.
- Created test data using automation scripts with Selenium WebDriver, Java, and Python, validating UI components, popup windows, and mouse movements.
- Conducted API functional testing of RESTful web services using Postman.
- Automated test execution using Maven and integrated with Jenkins, achieving a 20% reduction in regression testing time.
Orhan K.
Last position:
kv.digital GmbH
- Backend development work for appointment and doctor services, including the implementation of various requirements for managing doctor appointments.
- SCRUM/Kanban
- Java 21
- IntelliJ Idea
- SpringBoot (MVC, Data JPA, …)
- GIT
- Confluence
- JIRA
- Maven
- CI: Jenkins
- Docker
- ActiveMQ
- MariaDB
- Solr
- Liquibase
- Testcontainer
- JUnit5
- Mockito
Discover over 15,000 top freelancers
Statistics of experts using REST Assured
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
1.8 years
Positions per freelancer
13
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Energy
Certification focus areas
Information Technology, Project Management, Quality Assurance
Bachelor's degree or higher
94%
Master's degree or higher
50%
Doctorate
11%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
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 Germany 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 Germany using REST Assured
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.
REST Assured 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 (96%)
- Banking and Finance (63%)
- Energy (46%)
- Retail (46%)
- Automotive (42%)
- Healthcare (33%)
- Education (29%)
- Government and Administration (29%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What REST Assured does
REST Assured is a Java domain-specific language for testing REST APIs. It lets teams describe HTTP requests and expected responses in readable, executable tests. Assertions can cover status codes, headers, cookies, JSON or XML payloads, response times and extracted values.
Where it fits
REST Assured is commonly used in backend and integration test suites for services that expose REST endpoints. It supports checks for public APIs, internal microservices, payment flows, identity services and data-driven business processes. Teams use it to catch defects before releases and to protect existing API behavior during change.
Ecosystem and tooling
The library works naturally with Java build and test tools, including Maven or Gradle, JUnit and TestNG. Strong specialists also work with JSONPath, Hamcrest matchers, Jackson, Allure or similar reporting tools, and CI systems such as Jenkins, GitHub Actions or GitLab CI. They may combine API checks with WireMock, Docker and service virtualization.
Typical project tasks
- Design a maintainable API test structure for multiple services
- Build reusable request specifications, authentication helpers and test data fixtures
- Validate nested JSON, schemas, error handling and business rules
- Connect tests to Maven or Gradle builds and continuous integration pipelines
- Investigate unstable failures caused by environments, data or asynchronous behavior
When companies need specialists
Freelance expertise is useful when an API test suite must be created quickly, modernized or made reliable. It also helps during a migration from manual checks or browser-focused automation to service-level testing. In Germany, remote collaboration is often practical when documentation, API contracts and test results are shared clearly; on-site work can help with sensitive systems and close release coordination.
What strong professionals bring
The best professionals understand HTTP, REST design, status semantics, authentication such as OAuth 2.0 and token handling, not just the library syntax. They separate technical transport checks from business assertions, isolate test data, and keep failures easy to diagnose. They also review test value, avoid brittle assertions, and communicate clearly with Java teams, product specialists and service owners.
Frequently asked questions
Everything clients usually want to know about REST Assured, in one place.
REST Assured is used to automate tests for REST APIs in Java. A specialist can verify requests, response codes, headers, payloads, authentication and business rules without relying on a browser interface.
REST Assured turns API checks into code that can run consistently in Maven, Gradle and continuous integration pipelines. Postman and SoapUI can be faster for exploratory work and manual collections, while REST Assured is often better for versioned, repeatable regression suites maintained with application code.
REST Assured expertise should usually be paired with Java, JUnit or TestNG, Maven or Gradle, JSONPath and HTTP fundamentals. Experience with OAuth 2.0, OpenAPI, JSON schema, mocking tools and CI pipelines is also valuable for production-grade API testing.
A small suite may need a professional who can model endpoints, write assertions and connect tests to the build. Larger work calls for deeper knowledge of test architecture, data isolation, asynchronous services, reporting and failure diagnosis. The right level depends on API complexity and the maturity of the existing suite.
REST Assured work is usually suitable for remote collaboration because code, API specifications, pipeline results and defects can be reviewed online. Teams should agree on documentation standards, access controls, working language and overlap for debugging sessions. On-site collaboration may still help when systems or release processes are tightly restricted.
REST Assured supports common authentication patterns through request configuration and reusable helpers. Specialists may handle bearer tokens, OAuth 2.0 flows, API keys, cookies or mutual TLS, while keeping credentials outside source code and ensuring tests do not depend on unsafe shared accounts.
REST Assured tests should be readable, focused and stable. Strong suites assert meaningful behavior rather than every incidental field, use controlled data, provide useful failure output and run reliably in continuous integration. Professionals also remove duplication through reusable specifications without hiding important test intent.
Look for practical evidence of REST Assured work across API design, Java test frameworks and delivery pipelines. Ask how the professional handles flaky tests, changing contracts, secrets, test data and failed requests. A clear explanation of trade-offs is often more useful than a large collection of generic test cases.
The average hourly rate of freelancers in Germany who have used REST Assured in their recent projects is 101 €, which corresponds to a daily rate of about 805 € based on an 8-hour working day.
Of the freelancers in Germany who have used REST Assured in their recent projects, 94% hold at least a Bachelor's degree, 50% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Germany who have used REST Assured in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 1.8 years.
The most common languages among freelancers in Germany who have used REST Assured in their recent projects are German (92%), English (92%), and French (17%).
The most common industries among freelancers in Germany who have used REST Assured in their recent projects are Information Technology (96%), Banking and Finance (63%), and Energy (46%).
The most common business areas among freelancers in Germany who have used REST Assured in their recent projects are Information Technology (100%), Product Development (83%), and Quality Assurance (83%).
Main locations of FRATCH Experts, who have recently used REST Assured
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.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
