Karma Experts in Germany
for reliable browser testing, matched in minutes with vetted specialistsHire experts who configure Karma test runners, connect Jasmine or Mocha suites, and integrate browser-based checks into CI pipelines. FRATCH matches you quickly with precise, vetted and available freelancers for your testing needs.
Meet FRATCH Experts in Germany, who have recently used Karma
Alexandr K.
Last position:
Technical Co-Founder at Dealyv
- Joined the initial development team and helped transform an n8n prototype into a production-ready 0-to-1 product in a fast-paced environment.
- Owned delivery across CRM and Twilio integrations, customer communication workflows, and administrative interfaces.
- Collaborated on AI evaluation, microservice architecture, and other cross-functional product and engineering topics.
- Supported the CEO across VC communications, customer acquisition, product positioning, onboarding, documentation, pricing, and sales.
Megha H.
Last position:
Freelance Frontend Developer at Self-employed
- Designing and developing responsive, accessible web applications for SMEs and private clients with React.js, Tailwind CSS, JavaScript, and HTML5.
- Building reusable UI component libraries to improve maintainability and reduce development time.
- Integrating REST APIs and implementing dynamic features (landing pages, portfolios, dashboards) based on Figma/Adobe XD designs.
- Independently managing the full project cycle (analysis, development, testing, deployment on Netlify/Vercel) while following mobile-first and cross-browser standards.
Hamdi R.
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
Mathis D.
Last position:
Senior Web/Frontend Developer at KemCom GmbH
- Modernized the homepage of a luxury residential building for a better user experience and contemporary design
- Developed and implemented the website and modules using current web technologies
- Optimized for SEO to improve visibility in search engines
- Created a modern and professional appearance that enhances the building's image
- Increased efficiency in content maintenance by using a CMS
- Technologies: HTML5, HTML, CSS3, CSS, JavaScript, Umbraco, C#, .NET
Hüseyin K.
Last position:
Senior Full-Stack Engineer at DVAG
Architecture and implementation of a fully digitalized closing flow for managing securities contracts within the DVAG infrastructure. The platform aims for maximum user-friendliness, modular extensibility and compliant handling of sensitive data.
Implementation of a reactive UI structure with a focus on user guidance & accessibility.
Dynamic control of form and closing processes including validation logic.
Reactive state management via SignalStore (signals + selective effects).
UX optimization through adaptive components and Playwright-based UI tests.
Backend modularization to connect existing sales and contract logic.
API stability and DTO design according to Clean Architecture principles.
Collaboration with domain teams to define technical contracts and service boundaries.
Management with GitHub.
Unit tests with Jest, E2E tests with Playwright.
Code reviews, CI-integrated test execution, iterative refactorings.
Ensuring high coverage and UI stability in the closing flow.
Technologies: Angular 18, RxJS, SignalStore, HTML5, SCSS, Spring Boot, Kotlin, REST, OAuth2, Jest, Playwright, Clean Architecture.
Werner K.
Last position:
Test Coordinator, Designer and Engineer at IBM
- Testing the SekIDP and related components
- Test design, execution and automation, microservices, GitHub Enterprise, Eclipse, Katalon Test Platform, API Testing, Confluence 8, JIRA/Xray, Draw.io, Swagger/OpenAPI, Postman, Docker, Kubernetes, Podman, PuTTY, E-Health, Telematik, Gematik standards, EPA, E-Rezept, sektoraler IDP, encryption, XaDES, PaDES, DICOM, HL7, FHIR, IHE, ICD, SSO, SAML/Shibboleth, OAuth, smartcards, JWT, two factor authentication Android and iOS, Wireshark, BrowserStack, Cypress, gRPC, REST, SOAP, WS-Security, Linux Shell, PowerShell, SSH/SSL, Java, Kotlin, Cordova, Gradle, Groovy, Python, TypeScript
Anton K.
Last position:
Head of Overall Technical Integration NSC / Hadoop Cloud Development at IABG
Head of overall technical integration NSC (National Secure Cloud, project with approx. 60 employees).
Technical integration of all subprojects into one product, definition of interfaces and basic components of a cloud including hardware, technical architecture of the IABG platform.
Development of a Cloud Management Platform (CMP) capable of creating private/mixed clouds of any complexity based on a textual description with one click or interactively.
CMP also includes the complete hardware management lifecycle.
Kubernetes, OpenStack and Hadoop are used as the foundation.
The management layer includes Harbor, Gitea, Longhorn, Keycloak, Rancher and Jenkins, which are configured automatically.
Private cloud can run any customer workloads, including a full Hadoop layer with HDFS, Spark, MapReduce, Mesos, HBase and around 20 additional ML/DL technologies.
Hadoop worker clusters can also be installed automatically without Kubernetes on bare metal or commodity hardware.
OpenStack with Nova, Neutron, Ironic, Swift, Cinder, Ceph.
Development of a Java application Rudi: SOAP, REST, containers, DB.
Technologies: Kubernetes (K3s, Rke2, Minikube, Harbor, Gitea, Jenkins, Longhorn, Keycloak, Rancher), OpenStack (Nova, Neutron, Keystone, Swift, Ceph, Cinder, Sahara, Magnum, Kayobe, Kolla, Bigrost, Ironic), Hadoop (HDFS, Ambari, Solr, Livy, Ranger, YARN, Tez, HBase, Kafka, Hive, Zookeeper, MapReduce, Spark, Oozie, Flink), virtualization (Kubernetes (K3S), VMware, Oracle), scripting (Ansible, Puppet, Juju, Shell, Groovy, Gradle, Maven).
Gregor D.
Last position:
Founder, Principal Software Architect & Technical Consultant at Hold My Code GmbH
- Frontend modernization (multiple client engagements): Angular version upgrades, architecture refactoring, performance optimization, state management restructuring, and UI library consolidation resulting in faster load times and improved end-user experience across all projects.
- Web development: High-performance landing pages and company websites for SMB clients built with Next.js, SvelteKit, PayloadCMS, and TailwindCSS optimized for speed, SEO, and conversion.
- SaaS product development: Architecting and building an AI-powered platform for photography studio operators (PoC phase) with full-stack TypeScript: Angular frontend, NestJS backend, PostgreSQL, LLM integration (Gemini/Claude) for intelligent workflow automation.
- AI integration: Developed a PoC for AI-generated podcast avatars using the Gemini API for content production workflows.
- Angular deep dive workshops: Delivered 20+ workshops (3–5 days each, 8–10 participants) in a hands-on format where participants build a demo application modeled after their real business domain.
Arne H.
Last position:
Embedded Fullstack Developer at IoT / Infrastructure Automation Sector
- Analysis of legacy codebase and identification of architectural issues, implementing improvements in coordination with the Product Owner.
- Development of clean, efficient, and fully documented code following established software engineering practices and standards.
- Analysis of Erlang components in backend and device layers to provide recommendations for ensuring stable system operation.
- Setup and optimization of CI/CD pipelines on client infrastructure, including testing, debugging, and certificate management quality assurance.
- Participation in planning, design, and implementation of epics and stories according to Product Owner specifications.
- Technical consultation for Product Owner regarding Erlang codebase management and best practices.
- Collaboration with Product Owner, Scrum Master, and development team to ensure timely delivery of features.
- Elixir & Phoenix + PostgreSQL
- Erlang
- IoT
- CI/CD
- Git
- Agile/Scrum
- Docker
- Kubernetes
- Frontend (VueJS)
- Embedded Devices
Emre D.
Last position:
Frontend Architect, Angular Expert at MEDIFOX DAN
- Digitalizing care software to cover all requirements in outpatient and inpatient care and in therapy practices
- Developing professional frontends using technologies such as Angular, Nrwl, GraphQL, and C#
- Conducting regular workshops for the team
- Software design, architecture, and development
- Extending the software based on customer requirements
- Analyzing requirements
- Angular 14, Nrwl, GraphQL
Olaf N.
Last position:
Frontend Engineer at Danaher/Hach Lange GmbH
- Developed a SolidJS frontend UI for a spectrometric water analysis system on an ARM-based embedded Linux platform
- Prototyped UI in TypeScript React/Nx with LitElements and MQTT integration
- Built production UI using SolidJS, SUID, i18next, Ajv, MQTT.js, C3.js
- Refined requirements with UX team and water analysis system engineers
- Defined and documented system architecture, MQTT message formats, frontend architecture, and development setup
- Set up frontend system from scratch, implemented domain-oriented type system, UI components, and application state
- Managed MQTT pub/sub services and schema-based message validation in frontend
- Coached two junior frontend developers
- Worked in an agile remote team using JIRA, Git, and Bitbucket
Stefan B.
Last position:
Senior Full Stack Developer / Co-Founder / CTO / Head of Development at Netprint Development & Solutions GmbH
Overall technical responsibility for innovative SAP Customer Checkout solutions at leading clients such as Aramark, Consortium Gastronomie, Feinkost Käfer, TSG Hoffenheim, and VfB Stuttgart. Full support from requirements analysis to implementation and support.
Successful conception and development of the NDS SmartPOS platform ("Läufer App"):
Designed the software architecture and implemented it according to Modern Android Development principles.
Led a small development team (1 Android expert, 1 working student) with a 50% in-house development share.
Integrated various payment SDKs (S-Payment S-POS, VR Payment, CCV), enabling clients to achieve significant cost savings by reusing existing contracts.
Successfully rolled out to multiple major clients, resulting in demonstrably increased efficiency of sales staff.
Independently developed and successfully implemented critical infrastructure components:
Reporting server (SQL, JasperReports): Measurable reduction in accounting effort by eliminating daily manual transfers into the ERP system.
ZVT plugin: Solely implemented the serial protocol with Java/Netty over TCP/IP, saving several thousand euros per location and successfully deployed in multiple Bundesliga stadiums.
Completely in-house development of specialized plugins and server applications for custom functionality extensions of SAP Customer Checkout:
Waiter Teams Plugin: Allows waiters to work and settle bills in teams.
SQL reporting: Realized from conception to full documentation independently.
RFID payment solution for employee cards: Responsible for the complete development cycle.
Integration with reservation services: Designed seamless connections to Luca and other services, implemented together with a team member.
Direct technical on-site support for clients, including rapid troubleshooting in real-time environments with high transaction volumes and close coordination with stakeholders to continuously improve the systems based on practical experience.
Peter G.
Last position:
Senior Backend Developer at NetCom BW GmbH
- Development of microservices according to the TMF standard
- Adaptation of existing workflows to microservices (PNMGT, RADIUS, WBCI, ACS, VOIP, P2P)
- Migration of communication from RabbitMQ/REST to Kafka
- Development of Camunda processes for billing leased infrastructure
- Implementation of Kafka connectors for billing and inventory data systems
- Automation of the WBCI pre-coordination workflow
- Conducting unit, integration, and acceptance tests with business units
- Setting up CI/CD pipelines
- Troubleshooting support tickets
- Performing major refactorings of legacy code to adapt to new microservices
- Participating in meetings to gather and clarify requirements
- Technologies: Kubernetes, AWS DevOps, Apache Camel, Debezium, Python, TMF, Confluent, Kafka, OpenAPI, Java 21, Spring Boot, Docker, MapStruct, PostgreSQL, Maven, Camunda, Keycloak
Marc H.
Last position:
Senior Architect, Coach and Developer
Fixing issues in the application logic
Covering the changes with component tests
Analyzing and documenting the data structure of the different applications
Analyzing and documenting the parameters for configuring the applications
Analyzing and documenting the necessary measures to ensure the operation of the applications
Analyzing and designing the separation of the individual database structures
Analyzing and estimating the effort for planned enhancements
Analysis, maintenance and documentation of a heterogeneous legacy system landscape for a print media service provider
Technology: C#, VB.NET, C, Python, Microsoft SQL Server, Visual Studio 2010, JetBrains Rider, Visual Studio Code, arc42, Draw.io, Jira, GitLab
Sandeep G.
Last position:
Software Engineer at ACL Digital
- Developed high-performance APIs for SDK backend on JavaEE Web, iOS, and Android, improving application performance and scalability by 30%.
- Led system design, tech stack planning, and development, ensuring 98% uptime with strong code quality and automated tests.
- Implemented CI/CD pipelines with Jenkins and GitHub Actions, reducing release cycle time by 40%.
- Deployed cloud-native applications on AWS EC2 instances, ensuring 99% uptime and optimized performance.
- Delivered clean code with full unit, component, and integration test coverage, reducing defects by 25%.
- Collaborated across engineering, QA, and product teams to deliver secure, reliable solutions.
- Mentored team members, increased development efficiency by 20%, automated routine tasks, and contributed to hiring, growing team capacity by 15%.
Discover over 15,000 top freelancers
Statistics of experts using Karma
Aggregated from the professional profiles of matched freelancers.
Experience
17 years
Position duration
2 years
Positions per freelancer
13
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Government and Administration
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
92%
Master's degree or higher
48%
Doctorate
4%
Certifications per freelancer
1
Most common languages
German, English, Russian
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 Karma
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.
Karma 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 (100%)
- Banking and Finance (52%)
- Government and Administration (52%)
- Automotive (45%)
- Education (39%)
- Healthcare (39%)
- Insurance (39%)
- Manufacturing (39%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Karma Does
Karma is a JavaScript test runner that launches tests in real browsers or browser-like environments. It is commonly used for unit and integration tests where teams need results from Chrome, Firefox, Edge or headless browser sessions. Karma connects test files, browsers and reporting without becoming a testing framework itself.
Core Ecosystem
Karma works with testing libraries such as Jasmine, Mocha and QUnit. Specialists often configure launchers, preprocessors and reporters alongside webpack, Babel, TypeScript and source maps. The ecosystem also includes browser drivers, coverage tools, npm scripts and CI integrations for repeatable execution.
Typical Deliverables
- Configure Karma and browser launchers for local and headless testing
- Connect Jasmine, Mocha or QUnit suites to application builds
- Add code coverage, reporters and failure diagnostics
- Integrate test commands with Jenkins, GitLab CI or GitHub Actions
- Stabilize asynchronous tests and isolate browser-specific failures
When Companies Need It
Companies often bring in freelance expertise when an established JavaScript application has slow, flaky or poorly documented browser tests. Specialists can take over a legacy Karma setup, prepare it for CI, or assess whether a gradual move to Jest, Vitest or another runner is safer. In Germany, this can support distributed product teams that need clear documentation for remote and on-site collaboration.
Skills That Matter
Strong professionals understand JavaScript or TypeScript, package management and browser behavior beyond the test runner configuration. They can trace failures through application code, bundlers, mocks, asynchronous control flow and CI environments. Experience with Angular projects is often useful because Karma has been widely used in Angular testing setups, although it is not limited to that ecosystem.
Choosing the Right Specialist
Look for someone who can explain the current test architecture, reproduce failures and show how results will remain useful in CI. A good engagement includes a maintainable configuration, dependable browser startup, meaningful coverage reporting and a clear handover. Because the Karma project is deprecated, capable specialists should also discuss maintenance risks and a practical migration path when the existing stack no longer fits.
Frequently asked questions
Key details about Karma, drawn from the questions we get asked most.
Karma runs JavaScript tests in real or headless browsers and reports the results to the team or CI system. It is useful for checking browser behavior, application components and integration points rather than defining the assertions itself.
Karma is centered on launching tests in browsers, while Jest and Vitest usually provide an integrated runner and faster Node-based workflows. The right choice depends on whether genuine browser execution, an existing Angular setup or a simpler modern toolchain matters most.
A strong Karma specialist should also understand JavaScript or TypeScript, Jasmine, Mocha or QUnit, npm, webpack and browser automation. CI configuration, code coverage, asynchronous testing and Angular experience can be valuable depending on the project.
Karma usually needs experienced attention when tests are flaky, browser launchers fail, coverage is misleading or CI behaves differently from local machines. A specialist can also evaluate whether maintaining the setup or migrating to Jest, Vitest or another runner is the better technical decision.
The required depth depends on the work: a small configuration change needs familiarity with test commands and launchers, while a migration or unstable suite requires broader knowledge of build tools and CI. Ask for evidence of diagnosing browser-specific failures and improving test reliability rather than relying on a generic technology list.
Karma work is often suitable for remote collaboration because configuration, test logs and CI pipelines can be shared digitally. On-site sessions may help when browser behavior depends on internal devices or restricted environments, while clear English or German documentation supports distributed teams in Germany.
Karma is a mature option for an existing browser-based test suite, but the project is deprecated and should be assessed carefully for new work. A qualified specialist can compare the current needs with Jest, Vitest, Web Test Runner or framework-specific testing options before committing to a long-term setup.
Review whether Karma tests are deterministic, easy to run locally and consistent in CI across the required browsers. High-quality work includes understandable configuration, useful failure output, appropriate coverage, documented dependencies and a plan for maintenance or migration.
The average hourly rate of freelancers in Germany who have used Karma in their recent projects is 88 €, which corresponds to a daily rate of about 708 € based on an 8-hour working day.
Of the freelancers in Germany who have used Karma in their recent projects, 92% hold at least a Bachelor's degree, 48% hold at least a Master's degree, and 4% hold a doctorate.
On average, freelancers in Germany who have used Karma in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Germany who have used Karma in their recent projects are German (100%), English (94%), and Russian (16%).
The most common industries among freelancers in Germany who have used Karma in their recent projects are Information Technology (100%), Banking and Finance (52%), and Government and Administration (52%).
The most common business areas among freelancers in Germany who have used Karma in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (65%).
Main locations of FRATCH Experts, who have recently used Karma
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
