via indeed · 1 de junho de 2026 ·há 4 dias

Senior Ruby on Rails Developer

OnTheGoSystems
Lisboa Tempo inteiro Remote
Mais 191 vagas em Lisboa.
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Senior Ruby on Rails Developer
We are looking for a senior Ruby on Rails developer to help us build reliable, scalable products and apply AI/LLM technologies where they create real value.

This is a hands\-on engineering role for someone who can own complex features end to end, make strong technical decisions, and work across backend architecture, production systems, testing, and AI\-assisted product development.

You should be excited about AI, but pragmatic enough to know when a simple, deterministic solution is better than an LLM call.

What you’ll be working on:* Owning features from technical design to production

  • Building and maintaining Ruby on Rails systems used at scale

  • Designing AI/LLM\-assisted features and workflows where they improve product quality or user experience

  • Working with LLM APIs, prompts, retrieval/context strategies, and AI\-assisted development tools

  • Making trade\-offs around performance, reliability, cost, latency, security, and maintainability

  • Writing and maintaining automated tests, including unit, integration, and E2E tests

  • Debugging production issues and improving system reliability
Requirements

What we’re looking for:
To succeed in this role, you’ll have:

  • Strong professional experience with Ruby on Rails, ideally at senior level

  • Experience building and running production systems used by real customers

  • Strong backend skills, including databases, API design, performance, background jobs, and security;

  • Ability to break down ambiguous problems and propose practical technical solutions

  • Hands\-on interest or experience with AI/LLM technologies,

  • Good judgment about when to use AI and when simpler engineering approaches are better

  • Strong testing habits and care for long\-term code quality

  • A responsible, curious, flexible mindset: willing to debug, deploy, investigate, learn, and own outcomes
Nice to have:
  • Experience with React

  • CI/CD, background jobs, or AWS experience

  • Experience building AI\-powered product features in production

  • Familiarity with embeddings, vector search, RAG, evals, or LLM observability

  • Experience with text\-processing, localization, translation, or multilingual products
Benefits

Why Join OTGS?* Stable \& self\-funded: Founded in 2007, profitable, and independent.

  • Industry leaders: Creators of WPML, the \#1 multilingual plugin for WordPress, used on 1\.5M\+ sites

  • Fully remote, async\-friendly: Work from anywhere within EMEA hours

  • Engineering\-driven culture: Ownership, autonomy, testing, and thoughtful problem\-solving

  • Fair compensation and great benefits: Designed to support your well\-being both inside and outside of work.

O mercado para este tipo de cargo

Vagas similares
191
vagas de Software em Lisboa
Tempo integral
94%
das vagas de Software em Portugal
Remoto possível
34%
das vagas de Software
OnTheGoSystems

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active jobs
32.7%
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Ø 3d
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Top skills in demand
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