Ruby Experts in Munich
, matched in minutes from over 15,000 CVsHire experts who build maintainable web applications with Ruby on Rails, design REST and GraphQL APIs, and improve existing products with testing and performance work. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts in Munich, who have recently used Ruby
Karen M.
Last position:
Personal AI Engineering Project — Croky AI at Crocky AI
Product:
- Built a production-ready AI platform for generating brand-aware marketing images and videos from product data, user requirements, and uploaded media.
- Own the platform architecture, technical roadmap, API design, security, deployment workflow, operational reliability, and model-provider strategy.
- Developed the core platform in .NET and built supporting AI and workflow prototypes in Python, applying language-independent API contracts and structured interfaces between services and model providers.
- Implemented reliable background processing with RabbitMQ, persisted workflow state, idempotent handling, retries, failure recovery, logging, secure storage, authorization, and credit accounting.
- Made pragmatic build-versus-buy and model-routing decisions based on reliability, latency, cost, and maintainability rather than novelty.
Agent Orchestration & RAG Systems
- Built and compared agent workflows using Microsoft Agent Framework, LangGraph, and LangChain, including tool use, conditional routing, clarification steps, state management, and hand-offs between agents.
- Implemented reusable .NET components for agents, prompts, tools, model providers, structured responses, and retrieval with pyvector, making it easier to change AI providers without rewriting the core workflow.
Markus B.
Last position:
Developer / DevOps, Consulting at A state authority in Baden-Württemberg / FSAS Technologies GmbH
Oracle Project Management and Automation
As part of the project, the operation of an Oracle infrastructure was automated by developing and enhancing Puppet modules and migrating existing Bash scripts to a standardized configuration management solution.
The aim of the project was to standardize and automate administrative processes, improve the maintainability of the Oracle platform, and increase the efficiency and traceability of infrastructure management through the use of Infrastructure as Code.
- Analysis and migration of existing Bash shell scripts to a Puppet-based automation solution
- Development and enhancement of Puppet modules for Oracle environments
- Automation of installation, configuration and operational processes using Infrastructure as Code
- Standardization and optimization of configuration management for Oracle systems
- Creation and maintenance of technical and operational documentation
- Planning, coordination and professional support during project implementation
- Operation and automation of Oracle systems on x86-based Linux server platforms
- Testing and quality assurance of the developed Puppet modules
- Analysis and resolution of technical errors as part of the automation and migration
- Close coordination with specialist departments and infrastructure teams to implement automation requirements
Technologies used: Puppet 7/8, SLES 15, Oracle 19, Oracle Grid, SVN, Windows Server, Confluence, VS Code, Ruby, Bash, Pass
Serge K.
Last position:
Data Scientist & MLOps (Machine Learning Operations) at REWE Digital GmbH
- It is like a startup within REWE, where we have to build a new forecasting system on Google Cloud Platform from the scratch. Although, officially my role is called MLOps, my actual tasks also include development of data processing pipelines (data engineering) and data scientists tasks such as feature engineering and model trainings.
- GCP: Terraform (tofu), Vertex AI (Kubeflow), Cloud Run, IAM, Google Cloud Storage, BigQuery, Artifact Registry
- Data engineering: Snowflake as the main data warehouse, Terraform, DBT for data model implementations
- CI/CD: GitLab. We have built a CI/CD pipeline that automates deployments of new releases up to production environment
- Development of feature store and data synchronization between environments
- Data science: evaluation of different forecasting models, including CatBoost, Contextual Gamma and Random Forest; implementation of training pipelines using Kubeflow on Vertex AI; scaling and development of an event-driven interface using Kafka as a forecasting service; evaluation of MLFlow for model tracking and model registry
- Implementation of REST API using KeyCloak OAuth2 and OpenID (JWT)
- Monitoring: implementation of dashboards with Grafana, Prometheus, Mimir, Streamlit and Loki to monitor prediction metrics, GCP and Snowflake costs for pipelines, and system metrics
- Development of Copilot Agent Skills
Florian G.
Last position:
Senior IT Project Manager Security & Infrastructure & HealthCare Business Developer at CGI
- Responsible project manager for complex international infrastructure projects
- Coordinator and decision-maker for IT architects in network infrastructure and software with over 100 000 users
- Holistic project management
- Launch and implementation of initiatives
- Project management of international infrastructure projects with C-level reporting
- Leadership and coordination of IT architects
- Technical project management for merger and cloud transformation
- Execution of international software and hardware rollouts
- Implementation of IT security projects and compliance
- Working with key technologies (e.g. 5G/6G standard)
- Management of complex defense and aerospace projects (e.g. Ariane 6, Eurodrone)
- Establishment of the healthcare and life sciences business unit
- Creation and management of internal employee training
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
Jennifer K.
Last position:
AI Product Manager and Engineer at Human-in-the-Loop Studio
- Architected and built a GenAI-based automated asset-generation tool for social media campaigns using Nano Banana and Python. It takes a campaign brief, target audience, and two products as input, generates optimized prompts for image and text creation, and uses functions for text positioning, visually appealing overlays, resizing, and structured uploads to AWS S3.
- Engineered and built a multi-agent news intelligence platform with specialized roles including retriever agents (Tavily web scraping), synthesizer agents, and Claude as curator/orchestrator, designing autonomous agent collaboration patterns using LangChain and RAG.
- Built an autonomous customer service agent using n8n and LLMs, delivering end-to-end support automation with transparent reasoning, governance controls, and scalable workflow orchestration using Python and vector databases.
- Developed a financial validation engine featuring ML-powered anomaly detection for invoice plausibility, compliance automation, and risk mitigation using TensorFlow and SQL.
- Created a cost optimization application using OCR, AI, Pandas, and NumPy for data analysis to identify cost optimization potential.
Subodh K.
Last position:
Senior Software Engineer at EDAG Engineering GmbH
Project Title: Path Planning Module Development (Oct 2024 – Jun 2025)
Developed path planning module using C++14 and CMake
Implemented gRPC communication protocol between modules
Performed unit testing using Pytest framework and Python
Project Title: HMI Programming for Battery, Fuel Cell Electric Vehicle (Aug 2023 – Sep 2024)
Developed HMI software for BEV/FCEV using Ruby and Crystal for backend
Implemented frontend using Vue.js framework
Conducted bug fixes and simulator testing
Project Title: IFHOST CAN Bus Programming (Jan 2023 – Jul 2023)
Programmed CAN bus software using C and C++
Executed unit tests with Google Test framework
Performed integration testing using CAPL in Vector CANalyzer
Participated in onsite testing
Jan W.
Last position:
Technical Consultant at AI Beratung (KMU)
- Evaluation of RAG for legal advisory (build or buy)
- Evaluation and POC of RAG for an ERP time tracking module
- Consulting on foundation model selection
- Setup AI development environment (eliminating shadow AI)
- AI strategy consulting
- AI-assisted code creation and context engineering make change sets larger
- Strong software engineering expertise, code reviews and safeguarding through pipelines and domain-specific automated test cases
Discover over 15,000 top freelancers
Statistics of experts using Ruby
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
1.5 years (Germany: 3.1 years)
Positions per freelancer
14 (Germany: 12)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Retail, Media and Entertainment
Certification focus areas
Information Technology, Project Management, Human Resources
Bachelor's degree or higher
100% (Germany: 91%)
Master's degree or higher
63% (Germany: 53%)
Doctorate
13% (Germany: 5%)
Certifications per freelancer
6 (Germany: 2)
Most common languages
English, German, French
Speak two or more languages
100% (Germany: 99%)
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 Munich 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 Munich using Ruby
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.
Ruby 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 (88%)
- Retail (75%)
- Media and Entertainment (63%)
- Energy (50%)
- Automotive (38%)
- Banking and Finance (38%)
- Healthcare (38%)
- Manufacturing (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Ruby at a glance
Ruby is a dynamic, object-oriented programming language built for readable code and productive web development. Its best-known framework, Ruby on Rails, provides conventions for routing, database access, background jobs and application structure. Ruby is used for customer portals, SaaS products, marketplaces, internal tools and API-driven services.
Rails ecosystem
Ruby professionals often work across the full Rails ecosystem. They use Active Record for persistence, Action View and Hotwire for interfaces, and Sidekiq or similar tools for background processing. Strong knowledge may also include PostgreSQL, Redis, Docker, GitHub Actions, RSpec, Minitest and deployment on cloud infrastructure.
- Build Rails applications and JSON APIs
- Model data and manage schema changes
- Add background jobs, mailers and integrations
- Cover business logic with automated tests
Typical project needs
Companies bring in freelance Ruby specialists to launch a new product, extend a mature Rails codebase or take ownership of a delayed delivery. They may need help with payment flows, subscription logic, third-party APIs, authentication, search or event-driven workflows. In Munich, Ruby expertise can support software teams in commerce, mobility, media and financial services.
- Modernize legacy Rails code
- Improve response times and database queries
- Establish testing and release practices
- Prepare an application for team handover
When to hire support
External expertise is useful when a small team needs focused delivery without adding permanent capacity. It also helps when a product has grown faster than its architecture, tests are incomplete or releases depend on manual steps. A specialist can review the codebase, define a practical plan and deliver changes while documenting decisions for the internal team.
What strong professionals bring
Good Ruby specialists write clear code, understand business rules and know when Rails conventions should be followed or challenged. They investigate query plans, failure logs and production behavior instead of guessing. They also communicate trade-offs, keep pull requests focused and build tests around risks rather than chasing superficial coverage.
Collaboration and delivery
Ruby work suits both remote and on-site collaboration. Teams should agree on development workflow, review standards, deployment access and communication routines before work begins. For Munich-based companies, German or English collaboration can be arranged according to the project, while written technical documentation should remain precise and accessible.
Frequently asked questions
What clients ask us most about Ruby — answered in short.
Ruby is commonly used for web applications, SaaS products, marketplaces, internal business tools and API services. Ruby on Rails adds conventions for routing, persistence, authentication, background processing and testing, which makes it well suited to products that need steady iteration.
Ruby on Rails emphasizes convention over configuration and provides an integrated path from data model to web interface. Teams may compare it with Django, Laravel, Node.js or Spring Boot; the right choice depends on existing skills, runtime needs, hiring plans and the product's architecture.
A strong Ruby specialist often brings PostgreSQL, Redis, JavaScript or TypeScript, HTML and CSS, Git, Docker and cloud deployment knowledge. Testing with RSpec or Minitest, API design, observability and secure authentication are also valuable for production work.
The requirement depends on the codebase and the risk of the work, not on a fixed amount of time. A new Rails feature may need solid framework knowledge, while a migration, performance investigation or security-sensitive change calls for a specialist who has handled comparable production systems.
Ruby projects can usually be delivered remotely when repositories, environments and communication channels are well organized. Munich companies may choose remote collaboration, regular on-site workshops or a hybrid model, with German or English used according to the team.
Ruby is a strong option when a team values readable code, rapid product iteration and a mature web ecosystem. Rails can reduce routine setup work, but teams should still assess expected scale, latency requirements, operational skills and long-term maintenance needs.
Ask a Ruby specialist to explain a relevant project, the trade-offs they made and how they tested risky behavior. Review their approach to database design, code structure, monitoring, security and deployment rather than judging only framework vocabulary.
A Ruby freelancer should clarify the Rails version, application boundaries, deployment process, test health, database constraints and ownership of technical decisions. They should also confirm access, review expectations, release responsibility and how success will be evaluated.
The average hourly rate of freelancers in Munich, Germany who have used Ruby in their recent projects is 108 €, which corresponds to a daily rate of about 862 € based on an 8-hour working day.
Of the freelancers in Munich, Germany who have used Ruby in their recent projects, 100% hold at least a Bachelor's degree, 63% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Munich, Germany who have used Ruby in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 1.5 years.
The most common languages among freelancers in Munich, Germany who have used Ruby in their recent projects are English (100%), German (88%), and French (50%).
The most common industries among freelancers in Munich, Germany who have used Ruby in their recent projects are Information Technology (88%), Retail (75%), and Media and Entertainment (63%).
The most common business areas among freelancers in Munich, Germany who have used Ruby in their recent projects are Information Technology (88%), Product Development (88%), and Operations (63%).
Main locations of FRATCH Experts, who have recently used Ruby
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 
Frankfurt Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
