Postman Experts in Cologne
for reliable API delivery, matched in minutes with vetted and available freelancersHire experts who design API test suites, automate collections and improve documentation across REST, GraphQL and OAuth workflows. FRATCH matches you quickly and precisely with vetted, available freelancers for your Postman project.
Meet FRATCH Experts in Cologne, who have recently used Postman
Hassan A.
Last position:
DevOps & Observability Consultant at ALDI South (Albrecht's Discount)
- Supporting the DevOps team in Terraform-managed, multi-region AWS infrastructure to achieve environment parity.
- Developed end-to-end CI/CD pipelines using AWS CodePipeline, CodeBuild, and CodeDeploy, automating the build and deployment.
- Maintained pre- and post-deployment scripts to automate critical tasks such as database schema migrations and environment sanity checks.
- Implemented CI/CD flow specifically for hotfixes via separate Git branches, managing back-merge activities from feature branches to release branches to ensure code integrity through automated conflict resolution.
- Deployed a dedicated, lightweight sanity check application hosted cost-effectively on Azure Container Apps to run automated health and basic functional checks as a post-deployment activity triggered via pipeline.
- Investigated production incidents through code changes and AWS CloudWatch logs.
- Coordinated integration of Dynatrace APM and its APIs for monitoring purposes.
- Full stack QA strategist for a high-traffic e-commerce platform built on a layered architecture for the back-end testing of core platform services, especially the order management system in Zed and Glue layers.
- Managed automation activities, testing process, and refactoring practices.
- Responsible for framework migrations, setup, and training for new automation frameworks.
- Promoted a shift-left approach within the QA team and created the test concept.
- Participated in meetings with IT managers, business owners, product owners, and team members.
- Designed and implemented contract testing to validate API schema compatibility between the order management system and the Zed and Glue layers, reducing production-relevant breaking changes by approximately 3%.
- Led the migration to a multi-environment framework that enabled test execution across 4 country configurations from a single codebase.
- Integrated automated unit and functional tests directly into the GitLab CI/CD pipeline, reducing pipeline runtime by 32%.
- Coached and trained 5 QA engineers across Germany and Hungary in test automation, framework architecture, and best practices.
- Architected a layered backend test automation framework separating business logic, API request builders, and the database layer.
- Piloted AI-assisted testing with Playwright Agents, the Playwright MCP Server, and GitHub Copilot for automated test generation, execution, and self-healing Playwright scripts.
Till Z.
Last position:
Product Owner at OPED / Mawendo
- Interim PO for a DiGA-listed digital therapy platform, ensuring compliant product development in a highly regulated SaMD environment (BfArM, BSI) while maintaining delivery pace.
- Challenge: Regulatory complexity combined with hands-on delivery responsibility and only one week of onboarding time.
- Impact: Introduced AI-assisted product development workflows with clear quality standards and reinstated regular short release cycles for faster, more precise delivery. Currently optimizing product development workflows and reducing AI-generated bloat in tickets and documentation.
Yaroslav S.
Last position:
Senior Low-Code Consultant at Freelancer
Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix
Maurice K.
Last position:
Solution Architect – Cloud-Native Transformation of IoT Monitoring Platform at NDA / Wind Energy Sector
- Led the end-to-end architecture and migration of a legacy on- premise IoT monitoring system to a cloud-native Azure platform within a 17-member development team
- Designed and implemented a scalable microservices architecture (Java 21, Spring Boot, Kubernetes, Azure Services), decoupling IoT data streams and eliminating legacy system bottlenecks
- Defined technology stack, mentored developers, and orchestrated cross-functional teams in 4 countries to ensure high-quality delivery and alignment with architectural standards
- Drove requirements engineering and system redesign, removing years of technical debt and introducing event-driven processing and automated workflows
- Key Achievements
- Increased system stability and uptime by ~10x, eliminating need for 24/7 DevOps intervention
- Reduced hosting costs by ~80% (5x savings) through cloud optimization
- Improved performance and scalability, enabling stable handling of high-volume IoT data streams
- Delivered successful zero-disruption migration from on-prem to cloud, with strong user satisfaction and reliability from day one
Nawfal C.
Last position:
Internship in Software Development at Haeger Consulting
- working in a team using an agile method (Scrum)
- Backend development in Java (Spring Boot)
- Frontend development in Angular
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
Alexander R.
Last position:
Business Analyst at Financial Services Provider Landesbank
The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.
- Analysis of functional and technical requirements
- Analysis and optimization of business processes
- Process modeling
- Preparation and facilitation of workshops
- Defining project scope and prioritizing requirements
- Business process management (analysis, modeling, and optimization)
- Specification of user stories
- Designing business and authorization concepts
- Testing and acceptance
- Designing mockups in Figma
- Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma
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
Predrag P.
Last position:
Test Developer | Test Automator at CreditReform
Technologies: Java 25, Selenium, Insomnia, SSO, GitLab, Jenkins, Docker, Kubernetes, Jira, IntelliJ, Nexus, Oracle, MariaDB, Spring Boot, Grafana, Concept Board, Vue.js, OpenAPI, Kotlin. Implementation, maintenance, and extension of automated end-to-end regression tests for UI and API interfaces. Appropriate and targeted test automation across multiple software products, including Java-based Windows applications. Automating business processes with Selenium, reset jobs, and DB import jobs, as well as creating test concepts, test case descriptions, and structured bug reporting.
Jannik J.
Last position:
Freelance Salesforce Consultant & Developer at Self-employed
- Consulting and delivery of over 30 Salesforce projects (Sales Cloud, Service Cloud, Experience Cloud, Pardot, Marketing Cloud)
- Designing and setting up CRM architectures including requirements management, data modeling, and automation
- Implementing custom solutions (Apex, LWC, Flows, integrations)
- Developing interfaces with ERP, DMS, and email systems (SAP, Microsoft Dynamics, DocuWare, etc.)
- Introducing agile project methods (Scrum, Kanban) in client projects
- Coaching in-house Salesforce teams (admin and dev training)
Jyothikrishna S.
Last position:
Senior Back-end Engineer at RLE Engineering and Services GmbH
- Works at Ford Motor Company as Senior Back-end Developer on contract via outsourcing
- Designed and developed REST APIs based on the analyzed requirements and technical standards
- Investigated issues and defects to determine root causes and formulate corrective action measures
- Participated in QA, stage, and production release activities
- Conducted code reviews for performance improvement
- Provided monitoring and support using GCP
- Used test driven and behaviour driven development approaches
- Took part in agile ceremonies
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
Vishali T.
Last position:
Senior Analyst at Accenture
- Facilitated data retrieval for first-assist applications through an interface that fetches content based on client input criteria and loads it into the database via batch processing.
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 Postman
Aggregated from the professional profiles of matched freelancers.
Experience
13 years (Germany: 16 years)
Position duration
2.1 years (Germany: 1.8 years)
Positions per freelancer
7 (Germany: 12)
Top business areas
Information Technology, Quality Assurance, Product Development
Top industries
Information Technology, Retail, Banking and Finance
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
100% (Germany: 93%)
Master's degree or higher
64% (Germany: 59%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
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 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 Postman
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.
Postman 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 (93%)
- Retail (53%)
- Banking and Finance (47%)
- Professional Services (40%)
- Healthcare (33%)
- Insurance (33%)
- Automotive (20%)
- Manufacturing (20%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
API work with Postman
Postman is a platform for designing, sending, testing and documenting API requests. Teams use it to validate REST, GraphQL and SOAP services, inspect responses and share repeatable workflows across a product lifecycle. It supports exploratory checks as well as structured regression coverage.
Collections and environments
Collections group requests into logical flows for a service, feature or business process. Environments store variables such as base URLs, tokens and test data so the same requests can move between local, staging and production contexts. Strong specialists keep secrets out of shared files and make setup clear for every contributor.
Testing and automation
Postman scripts use JavaScript to prepare requests, extract values and assert response behavior. The Collection Runner supports repeatable runs with data files, while Newman runs collections from a command line and fits CI pipelines. Useful work includes status checks, schema validation, authentication flows, negative cases and contract-focused regression tests.
- Build reusable collections for core API journeys
- Add assertions for payloads, headers, errors and response time
- Run Newman checks in continuous integration
- Publish practical API documentation for internal or external users
Ecosystem and delivery
Postman connects with OpenAPI definitions, mock servers, monitors, webhooks and team workspaces. Specialists often work alongside Git, CI tools, API gateways, OAuth 2.0, JSON Schema and service observability tools. In Cologne, this combination can support distributed product teams that need consistent API collaboration across German and international offices.
When expertise helps
Companies bring in freelance professionals when an API estate lacks reliable tests, documentation or release checks. External support is useful during a migration, a partner integration, a new public API launch or a quality review. A specialist can also simplify scattered collections and establish conventions that internal teams can maintain.
- Review an inherited workspace and remove duplicated requests
- Convert manual checks into maintainable automated runs
- Align collections with OpenAPI and authentication rules
- Prepare onboarding guidance for product and quality teams
Signs of quality
A strong Postman professional explains what each request proves instead of adding assertions without purpose. They separate configuration from test logic, handle changing tokens safely and make failures easy to diagnose. Ask for examples of collection structure, CI integration and documentation, then check how clearly the person connects API behavior to business risks.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Postman.
Postman is used to send API requests, inspect responses and create repeatable checks for services. Companies also use it for collection-based documentation, mock responses, monitors and collaboration around REST, GraphQL and other API styles.
Postman offers a broad workspace for collections, environments, documentation, mocking and automated runs. SoapUI is often considered for service testing with a strong SOAP focus, while Insomnia is valued by some teams for a lighter request workflow. The right choice depends on the API mix, collaboration model and CI setup.
A strong Postman specialist usually understands HTTP, JSON, authentication and JavaScript-based test scripts. Experience with OpenAPI, OAuth 2.0, Newman, Git and CI pipelines helps turn a collection into a dependable delivery control rather than a set of manual requests.
The required depth depends on the outcome. A small collection cleanup may need focused API testing knowledge, while a public API quality program calls for experience with versioning, security flows, data-driven tests and CI execution. Review comparable deliverables and ask how the specialist handled unstable or unclear APIs.
Postman work is usually well suited to remote collaboration because collections, environments and documentation can be shared digitally. On-site sessions in Cologne can still help with discovery, access setup or team conventions, while clear written requirements and secure credential handling support distributed work.
Bring in a Postman freelancer when API checks are mainly manual, documentation is outdated or releases lack repeatable validation. Freelance support can also help during partner integrations, API migrations, CI adoption or a review of inherited workspaces.
Ask a Postman professional to explain the purpose of each collection, variable and assertion. Good work covers successful and failing cases, keeps secrets safe, produces readable failure messages and runs consistently outside the local workspace. A short review exercise can reveal more than a tool list.
Postman projects often involve product, quality, service and operations stakeholders, so communication matters as much as request syntax. Freelancers should clarify ownership, environment access, API specifications and CI expectations early. For teams in Cologne, English may be required alongside German when offices and partners are international.
The average hourly rate of freelancers in Cologne, Germany who have used Postman 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 Postman in their recent projects, 100% hold at least a Bachelor's degree and 64% hold at least a Master's degree.
On average, freelancers in Cologne, Germany who have used Postman in their recent projects have 13 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Cologne, Germany who have used Postman in their recent projects are German (100%), English (100%), and French (20%).
The most common industries among freelancers in Cologne, Germany who have used Postman in their recent projects are Information Technology (93%), Retail (53%), and Banking and Finance (47%).
The most common business areas among freelancers in Cologne, Germany who have used Postman in their recent projects are Information Technology (100%), Quality Assurance (80%), and Product Development (67%).
Main locations of FRATCH Experts, who have recently used Postman
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 
Frankfurt 
Stuttgart 
Dusseldorf 
Essen Countries:
Request a free demo
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Philipp Thomaschewski
FRATCH CEO
