Senior Ruby on Rails Developer - Freelancer

Monterail; Wrocław; Hybrid; PLN 180,000 - 260,000; Full time

Job summary

Monterail is seeking a Senior Ruby on Rails Developer to work as a freelancer on a luxury travel and hospitality platform. You will develop back-office features in Rails, design secure PostgreSQL data models, and migrate legacy data from MS SQL Server, while integrating with CRM and payment gateways.

Knowledge of CI/CD, containerization, and React is expected. Joining Monterail means collaborating with a client-focused team to reconstruct domain logic from the old system and ensure data security

Qualifications

• Solid commercial experience with Ruby on Rails.
• Understanding of secure application design principles.
• Experience in CI/CD and containerized environments.
• Basic React familiarity and working knowledge of Vue.js ecosystem is a plus.

Responsibilities

• Develop back-office features in Rails for premium properties.
• Design and model PostgreSQL databases with a focus on security and normalisation.
• Migrate data and business logic from legacy MS SQL Server systems.
• Build integrations with external systems (CRM, payment gateway).
• Collaborate with PM/PO to reconstruct domain logic from the old system.
• Maintain code quality and security for sensitive customer and billing data.

Skills

Ruby on Rails

React

CI/CD

Containerization

Security best practices

PostgreSQL

MS SQL Server

Pundit

Inertia.js

Feature flags

Tools

PostgreSQL

MS SQL Server

Pundit

Inertia.js

Vue.js related tools

Job description

Senior Ruby on Rails Developer - Freelancer

We are currently looking for a Senior Ruby on Rails Developer t o join one of our clients - a company operating in the luxury travel & hospitality space, managing an exclusive collection of premium properties across the Mediterranean.

What you need

• Solid commercial experience with Ruby on Rails
• Basic React familiarity
• Awareness of working in a CI/CD and containerized environment infrastructure
• Understanding of secure application design principles

What you'll be doing

• Developing back-office features in Rails
• Modeling and designing the PostgreSQL database with a strong focus on security and normalization (premium customer data)
• Migrating data and business logic from the legacy system (MS SQL Server) — analyzing existing structures and porting them thoughtfully and securely
• Building integrations with external systems (CRM, payment gateway)
• Working with PM/PO to reconstruct domain logic from the old system
• Maintaining code quality and security in the context of sensitive customer and billing data

Nice to have

• Experience with data/system migrations, Pundit, Inertia.js, feature flags
• Knowledge of C#/.NET
• Experience in the travel/hospitality industry or in projects with a strong customer-care focus

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We’re official Vue.js Partners

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