Karma Experts in Germany
for reliable browser testing, matched in minutes with vetted freelance specialistsHire experts who configure Karma test runners, integrate Jasmine or Mocha with JavaScript projects, and build reliable CI test pipelines. FRATCH connects you with precise matches from vetted, available freelancers quickly.
Meet FRATCH Experts in Germany, who have recently used Karma
David B.
Last position:
TypeScript Developer & UX Designer at colle-il-diaccino.de
TOURISM
colle-il-diaccino.de · Holiday Accommodation
- Designed and developed the website: interactive site map, accommodation comparison, and image galleries.
- Implemented German, English, and Italian language versions. Set up inquiry forms with input validation and spam protection, language-specific SEO metadata, and automated tests.
Stack: Next.js, React, TypeScript, Tailwind, next-intl, React Hook Form, Zod, Resend, Playwright, Vitest
Aurelia H.
Last position:
Software Full Stack Developer at INNIO Jenbacher GmbH & Co OG
- Implementing and extending an Electron app based on TypeScript, React and Node.js to display stream content and technical data
- Extending a Kotlin backend for message processing via Kafka
- Extending various React modules
- Programming custom solutions for customers, including testing
- Creating documentation
- Development in accordance with Scrum processes
Used skills: React, React Hooks, Jest, Vitest, Typescript, Electron, IntelliJ, Vite, Github, Jira, Node.js, yarn, npm, pnpm, Swagger, OpenAPI, Storybook, Docker, Prettier, Eslint, tailwindcss, i18n, GraphQL, CoPilot, Postgres, JSON, Sqlite, trpc, influxdb, Java, Spring, Kotlin, Kafka, Git, Sonarcube
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.
Marc H.
Last position:
Senior Architect, Coach and Developer
Fixing issues in the program logic
Covering the changes with unit tests
Analyzing and documenting the data structure of the various applications
Analyzing and documenting the parameters for configuring the applications
Analyzing and documenting the measures required to ensure the operation of the applications
Analyzing and designing the separation of the individual database structures
Analyzing and estimating the effort for planned extensions
Analyzing, maintaining and documenting 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
Mojtaba G.
Last position:
Full-Stack Software Developer at Energiebereich
- Led and coordinated consumption and price calculations for gas and electricity forecasts to ensure accurate and reliable price determination
- Implemented modern .NET 7-based microservices and Web APIs in an Azure environment using Azure App Service, Azure Storage and Azure Service Bus
- Created and managed infrastructure in Azure using Terraform, including resource provisioning and the automation of deployment processes
- Developed and maintained Azure DevOps pipelines to optimize build, test and release workflows
- Optimized data management with SQL Server and ensured seamless integration across all services
- Developed the frontend with Angular 16, TypeScript, CSS, HTML and Kendo UI to provide an intuitive and engaging user interface
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 for leading customers such as Aramark, Consortium Gastronomie, Feinkost Käfer, TSG Hoffenheim, and VfB Stuttgart. End-to-end support from requirements analysis through implementation and support.
Successful design and development of the NDS SmartPOS platform ("Läufer App"):
Development of the software architecture and implementation according to Modern Android Development principles.
Management of a small development team (1 Android expert, 1 working student) with a 50 % share of my own development work.
Integration of various payment SDKs (S-Payment S-POS, VR Payment, CCV), enabling customers to achieve significant cost savings by continuing to use existing contracts.
Successful rollout at several major customers, with demonstrably increased efficiency of sales staff.
Independent development and successful implementation of critical infrastructure components:
Reporting server (SQL, JasperReports): Demonstrable reduction in accounting workload by eliminating the need for daily manual data transfer to the ERP system.
ZVT plugin: Sole responsibility for implementing the serial protocol with Java/Netty over TCP/IP, saving several thousand euros per site and successfully used in production at several Bundesliga stadiums.
Complete independent development of specialized plugins and server applications for customized extensions of SAP Customer Checkout:
Waiter Teams Plugin: Enables waiters to work and settle accounts as a team.
SQL Reporting: Independently delivered from concept through complete documentation.
RFID payment solution for employee cards: Responsible for the complete development cycle.
Integration with reservation services: Designed seamless integration with Luca and other services and implemented it together with a colleague.
Direct on-site technical support for customers, including rapid troubleshooting in real-time environments with high transaction volumes and direct 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 workflow for WBCI preliminary coordination
- Execution of unit and integration tests as well as acceptance tests with the business departments
- Setup of CI/CD pipelines
- Error analysis for support tickets
- Execution of larger refactorings of legacy code to adapt it to new microservices
- Participation 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
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
Muhammad Jahangir J.
Last position:
Senior Full Stack Developer at Freelancer
- Architected RESTful APIs and microservices using .NET Core.
- Designed and managed SQL Server and Cosmos DB databases.
- Developed responsive frontends with Angular, Bootstrap, and TypeScript.
- Deployed and managed Azure cloud infrastructure.
- Implemented unit tests for both backend and frontend modules.
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
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
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.
Discover over 15,000 top freelancers
Statistics of experts using Karma
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
1.9 years
Positions per freelancer
14
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 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 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 29 Oct 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 (53%)
- Government and Administration (53%)
- Automotive (50%)
- Education (41%)
- Healthcare (41%)
- Insurance (41%)
- Manufacturing (41%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Browser test runner
Karma is a JavaScript test runner that launches tests in real browsers and reports results to the command line or a CI system. It is commonly used to validate browser behaviour, DOM interactions and client-side code rather than only running tests in a simulated environment. The project was formerly known as Testacular.
Where Karma fits
Karma sits between a test framework and the browsers that execute the tests. It works with Jasmine, Mocha, QUnit and other frameworks, while plugins connect it to launchers, preprocessors, reporters and coverage tools. This modular design lets teams adapt browser testing to an existing JavaScript stack.
Typical deliverables
- Karma configuration for local development and continuous integration
- Browser launcher setup for Chrome, Firefox or headless environments
- Unit and component test suites for web applications
- Code coverage, test reporting and failure diagnostics
- Reliable execution in containers and build pipelines
When specialists help
Companies bring in freelance Karma specialists when browser tests are slow, unstable or difficult to run outside a local machine. They can replace fragile setup, migrate older Testacular configurations, or connect tests to current build systems. In Germany, this support may be especially useful when distributed teams need clear documentation and dependable remote collaboration across time zones.
Skills around Karma
Strong professionals combine Karma configuration with JavaScript, TypeScript, npm and the project’s build tool, such as Webpack or Browserify. They understand asynchronous browser behaviour, fixtures, mocks, source maps and test isolation. Experience with GitHub Actions, GitLab CI, Jenkins or containerized runners helps keep feedback consistent from a laptop to production pipelines.
Judging technical quality
Look for specialists who can explain why a test should run in a real browser, how failures are reproduced and which checks belong at unit, component or end-to-end level. Good implementations control dependencies, clean up browser state and produce useful reports without masking intermittent failures. Ask for evidence of maintainable configuration, predictable CI runs and clear handover notes.
Frequently asked questions
Key details about Karma, drawn from the questions we get asked most.
Karma runs JavaScript tests inside real browsers or headless browser sessions. Companies use it to check client-side logic, DOM behaviour and component interactions, then send results and coverage data to local tools or continuous integration systems.
Karma is a browser test runner that works with separate frameworks such as Jasmine or Mocha. Jest provides a broader testing environment with its own runner, while Playwright focuses strongly on browser automation and end-to-end scenarios. The right choice depends on whether direct browser execution, fast isolated tests or full user journeys matter most.
A strong Karma specialist usually works confidently with JavaScript or TypeScript, npm, a test framework and the project build process. Useful adjacent skills include Webpack, browser launchers, code coverage, mocking, Git and CI systems such as GitLab CI or GitHub Actions.
The required depth depends on the task. A small configuration change may need focused familiarity with Karma, while a migration or unstable CI suite calls for experience with browser lifecycle issues, plugins, reporters and build tooling. Ask the specialist to describe a comparable test setup and the failures they had to resolve.
Yes. Karma configurations, test output and CI definitions can be reviewed and maintained remotely when the project has clear scripts and documentation. For teams in Germany, agree early on working language, collaboration windows, browser requirements and access to the relevant repositories and pipeline environments.
Karma can remain suitable when a project needs direct execution in selected browsers or already has a mature Jasmine or Mocha suite. For newer applications, teams may also evaluate Jest, Vitest or Playwright to reduce configuration or cover broader scenarios. The decision should follow the existing stack, browser targets and migration cost.
Review whether Karma tests are deterministic, readable and useful when they fail. A quality implementation separates setup from test logic, controls asynchronous work, cleans up browser state and produces reports that help the team locate the cause rather than hiding intermittent errors.
Before working with Karma, clarify the browser matrix, test framework, build tool, package manager and CI environment. Also confirm whether the goal is new coverage, a Testacular-era migration, faster execution or fixing flaky tests. These details define the configuration and the evidence of success.
The average hourly rate of freelancers in Germany who have used Karma in their recent projects is 90 €, which corresponds to a daily rate of about 720 € 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 18 years of professional experience, with a single engagement typically lasting around 1.9 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 (53%), and Government and Administration (53%).
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 (59%).
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
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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Philipp Thomaschewski
FRATCH CEO
