Ruby Expert
for reliable web products, matched in minutes with vetted and available freelancersHire experts who build maintainable web applications, APIs and automation tools with Ruby, Ruby on Rails and modern testing practices. FRATCH connects you with precisely matched, vetted freelancers who are available when your project needs them.
Meet FRATCH Experts who have recently used Ruby
Robert D.
Last position:
Software Architect at FinTech / Wealth Management
- Analysis of existing microservice structures and integration into the event-driven architecture
- Design and implementation of prototypes
- Introduction of structured workflows and integration into a solid testing strategy
- Team: Small specialized team (3-5 people) from analysis through implementation readiness
- Documentation of architectural decisions and definition of interfaces
- Integration of the event-driven pipeline into the existing landscape
- Technologies: Kafka, Docker, Microservices, Event-Driven Architecture, Java, Liquibase
Tobias M.
Last position:
Power BI Expert at MID-SIZED TRADING COMPANY FOR CLEANING TECHNOLOGY AND HYGIENE PRODUCTS
Reporting and controlling using Power BI for a production ERP system
- Analysis of ERP data and interfaces for use in Power BI dashboards
- Evaluation and migration of existing reports (e.g. Excel) to Power BI
- Development of an authorization concept for selective data access
- Documentation and training on the use and customization of Power BI dashboards
Label: Power BI, Excel, SelectLine ERP, Microsoft SQL, SQL Server Management Studio
Jens R.
Last position:
Platform Architect & Senior Developer at Direct client, industrial measurement technology, medium-sized company
- Technical leadership across hardware, firmware, and software teams; scope: hardware/firmware team (4 people) and leadership group (5 people)
- Consolidated and documented a product family that had grown over more than 15 years and aligned it with CRA compliance — from the bare-metal I/O module to the cloud interface.
- Provided the most important customer product with the essential requirements and architecture documentation within two months — for a firmware landscape that had grown over more than 15 years. It now supports the customer’s modernization strategy.
- Established a monthly reporting line to the supervisory board and executive board within three months: nine meetings since 12/2025. The report itself is versioned and built from the CI pipeline; it is based on automatically collected activity and release data instead of assessments.
- Built a container-based CI/CD infrastructure from scratch: cross-compilation, host tests, and documentation builds in one continuous pipeline.
- Introduced declarative QA gates for DevOps and development artifacts — from the start using lefthook instead of pre-commit, executed in a dedicated container image.
Technologies used: arc42, req42, tpo42, docToolchain, PlantUML, ArchiMate, C4 model, ADR, C, C++ (GTest), CMake, Bare Metal (ARM Cortex-M3/M7), OCI containers, Jenkins, lefthook, Prometheus, Grafana, SBOM, CRA, OPC, SCADA, PLC integration, IPv6 migration, Zero Trust, Sociocracy 3.0, Cynefin
Thomas Ü.
Last position:
Head of Engineering - Midnight at IOG / Midnight
- Built and scaled a 35-member engineering team (Core Engineering, QA, and SRE) in 12 months, accelerating Midnight’s blockchain development on Parity’s Substrate framework.
- Defined strategic direction and aligned technology development with business objectives as a key member of the leadership.
- Optimized software development processes and implemented agile methodologies, enhancing operational efficiency and code security.
- Delivered projects in a fast-paced startup environment through effective project management and resource allocation.
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.
Niko S.
Last position:
Developing Architect, Technical Lead "gridlytics" at HH Energienetze
- Building a data integration platform for high, medium, and low voltage assets for contextual analysis of time series with master data from the SCADA control system (IEC 60870 104), INIS, and SAP.
- Responsibility for the architecture and implementation of the solution, as well as sparring partner for the Product Owner.
- Use of Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter, and various API gateways.
Yannick S.
Last position:
Freelance IT Consultant/Advisor at Deutsche Glasfaser
- Led integration process of multiple systems between development agencies in Germany and India
- Advised on SDKs, system integration, system architecture, API contract design, Salesforce, ServiceNow, and SAP.
Gwen G.
Last position:
Senior Ruby on Rails & DevOps Developer at Sapiens
Further development of a software solution for managing audit applications and audit notifications according to §106d SGB V for the Association of Statutory Health Insurance Physicians in Hamburg.
- Developed numerous features, optimised performance, refactored code and analysed errors
- Refactored the development container setup
- Optimised the Gitlab-CI build pipeline
- Introduced improvements to the team workflow
Julius H.
Last position:
Freelancer at Freelancer — Pharma Industry
- Led migration to GCP using Terraform, GKE, and GitOps, improving deployment consistency and scalability
- Implemented Datadog observability stack via Terraform and datadog-operator
- Established automated end-to-end tests and on-call processes, improving incident response and service reliability
- Migrated from NGINX Ingress Controller to Kubernetes Gateway API (NGINX Gateway Fabric)
- Migrated stateful services (PostgreSQL and Redis) to GCP, improving scalability and operational reliability
Sanju R.
Last position:
Software Developer at Senior Connect GmbH
- Created complex backend systems (Fastapi Python, GCP cloud functions, APIs, integration tests) using Typescript.
- Worked with firebase and firestore databases, implementing transactional operations, scheduling jobs, and migrations.
- Implemented GCP dashboards for thorough monitoring and custom alerts in case of anomaly traffic.
- Implemented Sentry for better debugging, error tracking and overall monitoring of the Next.js frontend.
- Implemented story tests for UI related testing.
- Implemented Typesense in Python Fastapi backend, for improved text based searching along with typo handlings.
Yasin Y.
Last position:
Enterprise Architect at Bundesagentur für Arbeit
Task:
- Design and build a proof of concept (PoC) for a future-proof virtualization platform, taking secure system architectures into account
- Assess the current state of existing infrastructures and develop selection and evaluation criteria for the right OS virtualization platform
- Carry out the requirements analysis and then create and prioritize tickets in the ticket system
- Complete and continuously update a tool evaluation matrix based on PoC results
- Support team knowledge building through clear documentation of the approach and results in Confluence
- Enterprise analysis of existing hardware (creating different BoMs)
Technologies: Vmware, Vmware Aria Operations, Osism, Canonical OpenStack, FishOs, Linux, Terraform, Ansible, Confluence, Alma
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
Laurin H.
Last position:
Software Architect (Freelance) at Care4Sure
- Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
- Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.
Hoa Josef N.
Last position:
AI Architect and Enabler at Inhouse / AI Business
Technologies: n8n, Notion, OpenAI API, Claude, MS AI Foundry, MS CoPilot Studio, MS CoPilot, LLM, Node.js, Vercel, LangGraph, PostgreSQL, pgEdge, pgvector, Docker, LangChain, Ollama, Open WebUI
- Continuous evaluation and prioritization of internal automation needs
- ~20 AI agents in active use: research, content pipelines, document processing
- 5 n8n workflows for automated data and process control
- Architecture built on the same principles as in customer projects: state management, event-driven orchestration, API integration
- Ongoing operation and further development
Tobias V.
Last position:
Managing Partner at Unwritten GmbH
- Pioneering work in personalized AI: developing a framework for “Interactive Content” (RAG) for novels, lectures, expert debriefing
- Successful launch of Einbug, the Pantopia chatbot, with media coverage (SZ interview)
- Creating compelling AI personalities: AI blog ([link] 100% personalized learning environments, Perry Rhodan, among others.
Discover over 15,000 top freelancers
Statistics of experts using Ruby
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
3.1 years
Positions per freelancer
12
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Retail
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
90%
Master's degree or higher
52%
Doctorate
5%
Certifications per freelancer
2
Most common languages
English, German, Spanish
Speak two or more languages
99%
Based on our profile pool as of 16 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology 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 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 16 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 (98%)
- Banking and Finance (44%)
- Retail (41%)
- Healthcare (38%)
- Media and Entertainment (37%)
- Professional Services (35%)
- Education (31%)
- Automotive (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Ruby in practice
Ruby is a dynamic, object-oriented programming language designed for readable code and productive software development. Companies use it for web products, internal tools, APIs, data workflows and automation. Its clear syntax helps teams turn business rules into software that is easy to change.
Rails ecosystem
Ruby on Rails is the best-known web framework in the Ruby ecosystem. It provides conventions for routing, database access, background jobs, authentication and application structure. Strong professionals also work with Rack, Sinatra, Hanami, Bundler, Rake and gems that extend the language without adding unnecessary complexity.
Typical deliverables
Ruby specialists contribute to products at many stages:
- Customer portals, subscription products and transactional web applications
- JSON APIs and integrations with payment, messaging and business systems
- Background processing, scheduled workflows and data import pipelines
- Automated test suites, maintenance work and performance improvements
When expertise matters
Companies often bring in freelance Ruby expertise when an established Rails application needs careful modernization or when a product team must deliver a new feature without slowing existing work. Specialists can assess unfamiliar code, improve deployment workflows, replace fragile integrations and document decisions for an internal team.
Skills around Ruby
Effective Ruby work extends beyond language syntax. Professionals commonly combine Ruby with PostgreSQL, Redis, Docker, Linux, Git, cloud infrastructure and continuous integration. They may also use Sidekiq for background jobs, RSpec or Minitest for testing, Capybara for browser workflows and observability tools for production diagnostics.
What strong specialists bring
Good Ruby professionals make trade-offs visible and keep the codebase understandable. They know when Rails conventions speed delivery and when a narrower design is safer. Look for experience with database modeling, secure authentication, API design, testing, profiling and upgrades, plus the communication needed to work effectively with product, design and infrastructure teams.
Frequently asked questions
What clients ask us most about Ruby — answered in short.
Ruby is used to build web applications, APIs, internal business tools, automation scripts and data-processing workflows. It is especially common in products where clear code, fast iteration and a mature web ecosystem matter.
Ruby on Rails offers strong conventions for application structure, database work, routing, testing and background processing. Compared with more minimal frameworks, it provides more built-in direction; compared with ecosystems such as Django or Laravel, the choice often depends on existing team skills, libraries and system requirements.
Ruby work commonly involves PostgreSQL, Redis, Docker, Git, Linux, cloud deployment and continuous integration. Experience with Sidekiq, RSpec, Minitest, REST or GraphQL APIs and monitoring tools is also valuable for production systems.
The right level depends on the codebase, risk and scope rather than on the language alone. A focused feature may suit a specialist who works comfortably within Rails conventions, while a migration, performance issue or major upgrade calls for someone experienced with system design and legacy code.
Ruby projects are often well suited to remote collaboration because code, tests, documentation and deployments are shared digitally. Clear written communication, regular reviews and agreed access to development environments are more important than physical proximity.
Ruby is a strong option when a team values readable code, rapid product iteration and a mature web framework. Another language may be a better fit for highly specialized runtime performance, an existing organization-wide stack or a platform ecosystem that Ruby does not support as well.
Ask how the specialist approaches tests, database changes, security, monitoring and maintainability, not only how quickly features can be written. A strong Ruby professional explains trade-offs clearly, reviews existing code carefully and leaves behind documented, testable improvements.
Ruby freelancers support new Rails products, legacy application upgrades, API integrations, background jobs, test automation and performance work. They may also help teams introduce deployment practices, improve technical documentation or transfer knowledge to permanent professionals.
The average hourly rate of freelancers who have used Ruby in their recent projects is 95 €, which corresponds to a daily rate of about 759 € based on an 8-hour working day.
Of the freelancers who have used Ruby in their recent projects, 90% hold at least a Bachelor's degree, 52% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers who have used Ruby in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 3.1 years.
The most common languages among freelancers who have used Ruby in their recent projects are English (99%), German (94%), and Spanish (18%).
The most common industries among freelancers who have used Ruby in their recent projects are Information Technology (98%), Banking and Finance (44%), and Retail (41%).
The most common business areas among freelancers who have used Ruby in their recent projects are Information Technology (97%), Product Development (90%), and Project Management (48%).
Main locations of FRATCH Experts, who have recently used Ruby
Our freelancers and interim experts are at home all over Germany — available on-site in Berlin, Hamburg, Munich and every major business hub, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Frankfurt In Austria our freelancers and interim experts support companies from Vienna to Graz — on-site where your project needs them, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
Vienna Graz Across Switzerland our specialists are active in Zurich, Geneva, Basel and Bern — working on-site or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
Zurich Geneva Basel Bern Countries:
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FRATCH CEO
