REST Assured Experts in Germany
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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
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.
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
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.
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.
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
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
Daniel W.
Last position:
Senior Developer / Deputy Project Lead at Finanz Informatik GmbH & Co. KG
Worked as a Senior Developer
Worked as a Deputy Project Lead
Technologies: Java (Spring), React
Environment: OSPlus, MKP
Developed various standalone tools
Developed unit and Selenium tests
Integrated REST APIs
Full-stack development
Managed and planned a project to migrate an existing application to a new software stack
Agile project approach
Discover over 15,000 top freelancers
Statistics of experts using REST Assured
Aggregated from the professional profiles of matched freelancers.
Experience
19 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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany 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 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 29 Oct 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
Automated Testing for Modern HTTP Endpoints
REST Assured is a domain-specific language for testing RESTful web services on the Java Virtual Machine. It simplifies validating HTTP responses, status codes, headers, and payloads by bringing a Given-When-Then syntax to integration testing across complex backend services.
Core Capabilities and Ecosystem Integration
Specialists combine the library with core Java and Groovy ecosystems to write readable regression tests. It serializes and deserializes payloads using Jackson or Gson, and fits natively into build systems and test runners.
- Schema validation using JSON Schema and XML schemas
- Assertion handling with Hamcrest matchers and AssertJ
- Test orchestration via JUnit 5 and TestNG
- Build execution through Maven and Gradle
- Reporting integration using Allure and ExtentReports
Quality Assurance in Distributed Microservices
Modern architectures demand resilient contracts between independent services. Teams rely on automation to verify OAuth2 flows, cookie handling, multipart file uploads, and cross-service payloads without spinning up heavy frontend browsers or manual API clients.
Delivering High-Throughput Test Architectures
Experienced professionals structure modular test frameworks with reusable request specifications and response builders. They establish custom filters for logging, handle SSL configurations securely, and eliminate flaky test runs caused by shifting test environments and unmanaged state.
When Engineering Teams Bring in External Specialists
Organizations seek external expertise during microservice migrations, when manual postman collections become unmaintainable, or to enforce compliance standards in German enterprise and fintech sectors where API correctness and deterministic builds are essential.
Hallmarks of Seasoned REST Assured Professionals
Top specialists write clean, maintainable code rather than brittle script sequences. They understand network latency, mock third-party dependencies using WireMock, integrate suites into Jenkins or GitLab CI pipelines, and align API testing with contract testing practices.
Frequently asked questions
Everything clients usually want to know about REST Assured, in one place.
REST Assured eliminates boilerplate Java code when interacting with REST endpoints. It provides a fluent interface to prepare HTTP requests, authenticate, send payloads, and assert responses in a standardized format that integrates directly into unit and integration test suites.
While Postman suits manual exploration and lightweight automation, REST-Assured lives directly inside the Java code repository alongside application sources. Compared to Karate, which uses a standalone Gherkin-like syntax, it allows specialists to leverage full Java object models, type safety, and internal helper libraries.
A proficient professional using rest-assured typically works with Java 17 or Java 21, JUnit 5, TestNG, and Jackson for object mapping. They also bring hands-on experience with WireMock for service virtualization, Docker for local test containers, and CI/CD tools like GitLab CI or GitHub Actions.
Yes, REST Assured provides built-in mechanisms to handle basic auth, form authentication, and OAuth2 bearer tokens. Specialists configure request filters to automatically capture tokens, handle refresh cycles, and attach Authorization headers across automated test runs.
Productive automation with REST Assured requires solid software engineering fundamentals in Java rather than basic script writing. Strong professionals understand object-oriented patterns, build lifecycle management in Maven or Gradle, and asynchronous processing to construct resilient test frameworks.
Look for clear abstraction layers, such as request specification factories and response decoders, rather than hardcoded URLs and payloads. Quality implementations of REST Assured run fast, fail with descriptive error messages, validate schema contracts, and run reliably in automated pipelines.
Most projects across Germany operate in remote or hybrid setups, as API automation code integrates entirely via cloud repositories and continuous integration runners. Occasional on-site workshops in hubs like Berlin, Munich, or Frankfurt may occur during project kickoffs or architecture alignment.
Technical deliverables built with REST Assured rely on standardized code and English documentation. However, enterprise environments in the German banking, automotive, and public sectors often appreciate bilingual specialists who can collaborate with local product owners and compliance teams.
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 19 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
