Ruby Expert
for web products and automation, matched in minutes with vetted freelancersHire experts who build maintainable web applications with Ruby, Ruby on Rails, PostgreSQL and background processing. FRATCH quickly connects you with precise matches among vetted, available freelancers.
Meet FRATCH Experts who have recently used Ruby
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
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.
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
Andreas K.
Last position:
Test / QA / QS at KARDEX Software GmbH KARDEX Remstar
Testing adjustments to customer requests for warehouse / logistics software
Windows 10 / 11 Atlassian Tool Chain Agile testing / Kanban
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
Diego E.
Last position:
RPG Software Developer from RPG III to Free Format
- Development of software and system support for RPG development.
- Development, optimization and maintenance of programs in RPG (RPG II to ILE Free Format).
- Performing integration tasks, data management as well as applying and managing system updates.
- User support and training to ensure smooth system operation.
Olaf T.
Last position:
BI Architect in Kanban Team at Gulp / Randstad for HHLA
- Creation of automated tests.
- Extension of the functionality of the enterprise BI data warehouse.
- Design and development in SQL and PL/SQL.
- Data modeling as well as performance measurement and tuning.
- Creation of and contribution to user stories and concepts.
- Technical environment: Windows, Linux.
- Database: Oracle 19c incl. DWH, CDB, PDB.
- Tools: Confluence, CVS, Eclipse, Git, GitLab, Jira, N4, PL/SQL, SQL Developer, utPLSQL.
Thomas Ü.
Last position:
Head of Engineering - Midnight at IOG / Midnight
IOG (IOHK), is one of the world's pre-eminent blockchain infrastructure research and engineering companies.
- Converted a lingering R&D project into a cohesive, production-ready testnet; built and scaled the 35-member engineering team (Core, QA, SRE) to achieve this goal.
- 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.
Serge K.
Last position:
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
Marc F.
Last position:
Interim Talent Acquisition Manager at doctari
- Building a cross-functional product team to develop a super app
- Advising and mentoring to support the team and provide input (technical & soft skills)
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
53%
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 26 Sep 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 26 Sep 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 (40%)
- Healthcare (37%)
- Media and Entertainment (36%)
- Professional Services (36%)
- Education (31%)
- Insurance (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 known for readable syntax and fast product development. It is used for web applications, internal tools, APIs, automation scripts and data-backed services. Ruby lets teams express business rules clearly while keeping code approachable.
Rails ecosystem
Ruby on Rails is the leading web framework in the Ruby ecosystem. It provides conventions for routing, models, database migrations, authentication flows and background jobs, with strong support for test-driven development. Common components include PostgreSQL, Redis, Sidekiq, RSpec, Minitest and Bundler.
Typical deliverables
Ruby specialists contribute across the full application lifecycle:
- Design and extend Ruby on Rails applications
- Create JSON APIs and integrations with external services
- Model data and manage PostgreSQL migrations
- Build background jobs with Sidekiq and Redis
- Improve test coverage, performance and deployment workflows
When expertise matters
Companies bring in freelance Ruby professionals when a product needs focused delivery, a Rails codebase requires modernization, or internal capacity is limited. Their support can cover a new feature, a legacy migration, an API integration or a review of application structure. This is especially useful when reliable delivery matters more than adding another permanent role.
Collaboration and adjacent skills
Ruby work often connects with JavaScript or TypeScript front ends, HTML and CSS, REST and GraphQL APIs, Docker, Linux and cloud deployment. Strong communication is important when specialists work remotely with product, design and operations teams. Clear tickets, shared documentation and regular reviews help remote collaboration stay effective.
What strong specialists bring
A capable Ruby professional understands more than syntax. They make sound choices around object design, database queries, security, testing, observability and upgrade paths. Look for experience with the relevant Ruby and Rails versions, evidence of thoughtful code review, and the ability to explain trade-offs in terms of product risk and maintainability.
Frequently asked questions
What clients ask us most about Ruby — answered in short.
Ruby is used to create web applications, APIs, automation tools, content systems and internal business software. Ruby on Rails is particularly suited to data-driven products that need clear conventions and frequent iteration.
Ruby on Rails offers strong conventions and many built-in patterns, which can make product work consistent and efficient. Compared with less opinionated frameworks in Python, PHP or JavaScript ecosystems, Rails may require fewer architectural decisions but still allows customization when the application grows.
A strong Ruby specialist often works with Ruby on Rails, SQL, PostgreSQL, REST APIs, Git and automated testing. Depending on the project, Docker, Redis, Sidekiq, JavaScript, TypeScript and cloud deployment are also valuable.
The right level depends on the codebase, risk and scope rather than a fixed number of years. A small feature may need a specialist who can work safely within existing Rails conventions, while a migration or performance effort calls for deeper knowledge of Ruby internals, databases and production operations.
Yes, Ruby work is often well suited to remote collaboration because code, tests, tickets and deployments are shared digitally. Teams should agree on communication routines, review practices, documentation standards and the overlap needed for decisions.
A company may need a Ruby freelancer for a Rails feature, API connection, legacy upgrade, reliability review or temporary product acceleration. An external specialist is useful when the task has a clear outcome and the existing team needs focused expertise without a long-term staffing commitment.
Ask how the Ruby professional approaches testing, database design, security, monitoring and incremental delivery. Review examples of decisions they made, not only screenshots or framework names, and use a technical discussion to see whether they explain trade-offs clearly.
Ruby remains a practical choice for teams that value readable code, established libraries and fast delivery of business-focused web products. The decision should consider the available ecosystem, the team’s strengths, performance needs and long-term maintenance rather than popularity alone.
The average hourly rate of freelancers who have used Ruby in their recent projects is 95 €, which corresponds to a daily rate of about 760 € 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, 53% 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 (17%).
The most common industries among freelancers who have used Ruby in their recent projects are Information Technology (98%), Banking and Finance (44%), and Retail (40%).
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
