Senior Ruby On Rails Engineer (Remote)

Recruiter4you; Lisboa; Remote; EUR 75,000 - 105,000; Full time

Benefits offered by this job

100% remote work

Competitive salary

Company laptop

Annual company gathering

Job summary

We’re looking for an experienced Senior Ruby on Rails Engineer to join a fast-growing AI technology company behind an AI companionship platform used by millions worldwide.

You’ll work on scalable, AI-powered applications, developing new features and improving existing functionality alongside the CTO, Tech Lead and wider engineering team. This is a hands-on role for someone who enjoys coding and taking ownership in a fast-moving environment.

Qualifications

• 5+ years of commercial backend or full-stack experience.
• Strong Ruby on Rails experience, recent and in production.
• Experience scaling production apps with real users.
• Ownership of features from requirements to deployment.
• Experience in startup/scale-up, fast-paced env.
• Excellent English and ability to work with international teams.
• Comfort with uncensored NSFW content.

Responsibilities

• Design, build, and maintain scalable backend apps with Rails.
• Develop new features and improve platform functionality.
• Translate requirements into technical solutions with PMs.
• Write clean, tested production code.
• Participate in code reviews and technical decisions.
• Troubleshoot and improve performance and reliability.
• Collaborate with distributed teams.

Skills

Ruby on Rails

Backend

Production systems

Ownership

English

Distributed teams

Tools

PostgreSQL

Redis

Hotwire

Tailwind CSS

Job description

Location: Fully remote – Europe (CET ±3 hours)
Salary: €75,000–€105,000/year, depending on location and experience
Contract: B2B preferred, flexible
Experience: 5+ years
Important: Must be comfortable working with explicit NSFW content.

About the Role

We’re looking for an experienced Senior Ruby on Rails Engineer to join a fast-growing AI technology company behind an AI companionship platform used by millions worldwide.

You’ll work on scalable, AI-powered applications, developing new features and improving existing functionality alongside the CTO, Tech Lead and wider engineering team.

This is a hands-on individual contributor role for someone who enjoys coding, taking ownership and delivering high-quality solutions in a fast-moving environment.

Key Responsibilities

• Design, develop and maintain scalable backend applications using Ruby on Rails.

• Build new features and improve existing platform functionality.

• Work with Product Managers to translate requirements into technical solutions and estimate development efforts.

• Write clean, maintainable, well-tested production code.

• Participate in code reviews, testing and technical decision-making.

• Troubleshoot issues and improve application performance, reliability and scalability.

• Collaborate with distributed engineering, product and infrastructure teams.

Requirements

• 5+ years of commercial experience in backend or full-stack software engineering.

• Strong, hands-on Ruby on Rails experience, ideally recent and in production.

• Experience building and scaling production applications with real users.

• Ability to take ownership of features from requirements through development, testing and deployment.

• Previous experience in a startup, scale-up or similarly fast-paced environment.

• Strong problem-solving skills and the ability to balance code quality with delivery speed.

• Excellent English and experience working with international teams.

• Full comfort working with uncensored AI companionship products and explicit NSFW content.

Tech Stack

Ruby on Rails, PostgreSQL, Redis, Hotwire (Turbo and Stimulus) and Tailwind CSS.

Nice to Have

• Experience with generative AI, LLMs, NLP or machine learning.

• Familiarity with modern Rails development practices and AI-assisted coding tools.

• Experience working with globally distributed engineering teams.

What’s on Offer?

• 100% remote working.

• Competitive salary, depending on location and experience.

• Direct collaboration with senior engineering leadership.

• Opportunity to influence technical decisions and product development.

• 20 days of paid annual leave.

• Learning and development budget, health and wellbeing support.

• Company laptop and equipment.

• Access to AI development tools, including Cursor, Claude Code and ChatGPT.

• Annual company gathering.