Ruby Experts
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Meet FRATCH Experts who have recently used Ruby
Tobias Mönch
Last position:
Power BI Expert at MID-SIZED RETAIL COMPANY FOR CLEANING TECHNOLOGY AND HYGIENE PRODUCTS
Reporting and controlling with Power BI for a productive 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 access rights concept for selective data access
- Documentation and training on how to use and adapt the Power BI dashboards
Label: Power BI, Excel, SelectLine ERP, Microsoft SQL, SQL Server Management Studio
Karen Manukyan
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 Schmuck
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 Herrera Glomm
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
Yasin Yildiz
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
Sanju Raj Prasad
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.
Andreas Klös
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 Hagemann
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 Nguyen
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
Khaled Teilab
Last position:
Consultant / DevOps Engineer at Dr. Ing. h.c. F. Porsche Aktiengesellschaft
- Porsche ID is a unified digital identity platform providing secure authentication and seamless access across Porsche’s online services, mobile apps, and connected vehicle features
- Designed and implemented new authentication and authorization functionalities for both users and systems
- Ensured high availability, security, and performance to deliver a flawless digital experience for Porsche customers
- Technologies: Auth0, Angular, Tailwind, AWS, Terraform, Github
- Methodologies: Scrum and SAFe
Diego Espinoza
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.
Thomas Ãœbermeier
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 Kalinin
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 Fritze
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)
Olaf Taesch
Last position:
BI Architect in a 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.
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
91%
Master's degree or higher
54%
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 6 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology 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 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 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Ruby at a glance
Ruby is a general-purpose language known for readable code and fast development. Companies use it for web applications, internal tools, APIs, automation, and script-heavy backend work. It is often paired with Ruby on Rails, but Ruby also stands on its own for service code and command-line tasks.
Common use cases
- Web products built with Ruby on Rails
- API backends and integrations
- Background jobs, schedulers, and mail flows
- Automation scripts and data processing
- Internal admin tools and rapid prototypes
Ecosystem and tooling
The Ruby ecosystem centers on gems, Bundler, Rake, and Rails. Strong professionals know how to manage dependencies, structure apps, write tests with RSpec or Minitest, and keep code maintainable as teams grow. They also work comfortably with PostgreSQL, Redis, and common deployment setups.
When companies bring in specialists
Teams usually need freelance Ruby expertise when a product needs quick delivery, a legacy Rails app needs cleanup, or a feature depends on deep backend changes. Specialists are also useful for upgrades, performance work, payment flows, and rescuing codebases that have become hard to change. They can join remote teams or work alongside in-house staff.
What strong Ruby professionals deliver
Strong professionals write clear code, cover changes with tests, and keep business logic easy to follow. They understand controllers, models, background workers, caching, and API design. They should also spot risky dependencies, reduce technical debt, and explain trade-offs in plain language.
Hiring signals
Look for specialists who have shipped real Ruby or Rails work in products similar to yours. Good signs include stable code structure, sensible testing habits, clean review comments, and a practical view of performance and security. For older systems, ask how they approach refactoring without breaking existing behavior.
Frequently asked questions
What clients ask us most about Ruby — answered in short.
Ruby is often used for web apps, APIs, automation scripts, and backend services. Many companies also use it for internal tools, scheduled jobs, and data-heavy tasks where clear code matters. It is especially common in Ruby on Rails projects, but plain Ruby still plays a big role.
Hire a Ruby specialist when the codebase is built around Ruby or Ruby on Rails and the work needs deeper knowledge of that stack. That is especially true for refactoring, upgrades, testing, and performance tuning. A specialist will usually move faster through Rails conventions, gems, and common project structure.
Ruby is often chosen for readable code, rapid development, and mature Rails conventions. Compared with Python, it is more opinionated in web projects; compared with JavaScript, it keeps backend and frontend concerns more separated. The best choice depends on the product, but Ruby remains strong for teams that value speed and clean structure.
A strong Ruby freelancer usually knows Ruby on Rails, SQL, testing, Git, and API design. Useful extras include PostgreSQL, Redis, Sidekiq, Docker, cloud deployment, and debugging production issues. For older systems, knowledge of refactoring and upgrade paths is very helpful.
The right level depends on the task, but Ruby work often benefits from someone who has already shipped similar backend features. Small scripts or isolated fixes may need less depth, while Rails upgrades, architecture changes, and performance work need a more seasoned specialist. The key is proven work on code that resembles yours.
Most Ruby work can be done remotely because the tasks are code, tests, and reviews. On-site collaboration can help during discovery, handover, or when the team needs close support on a legacy app. In many cases, a remote specialist with clear communication is enough.
Look for clear structure, good tests, and code that is easy to change. A strong Ruby professional explains trade-offs, keeps dependencies under control, and avoids clever code that is hard to maintain. Past work on Rails apps, API projects, or rescue assignments is often the best signal.
Ruby is the language, while Ruby on Rails is the web framework built on top of it. If your project is a web product, you often need someone who knows both, because Rails conventions shape most of the work. For scripts, tools, or service code, pure Ruby may be enough.
The average hourly rate of freelancers who have used Ruby in their recent projects is 95 €, which corresponds to a daily rate of about 757 € based on an 8-hour working day.
Of the freelancers who have used Ruby in their recent projects, 91% hold at least a Bachelor's degree, 54% 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 (93%), 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 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 
Frankfurt Request a free demo
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Philipp Thomaschewski
FRATCH CEO
