Senior Ruby on Rails Developer

Job not on LinkedIn

🕒 August 24

🇦🇷 Argentina – Remote

⏳ Contract/Temporary

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 33%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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EX Squared

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2000

💼 Consulting

🤖 Artificial Intelligence

🤝 B2B

Consulting • Artificial Intelligence • B2B

EX Squared is a digital product and experience consultancy that helps enterprises move AI and digital initiatives from ambition into production. Since 2001 the firm has delivered strategy, UX/UI and multi-channel digital experiences plus engineering and IT infrastructure work, and specializes in GenAI, machine learning, computer vision, and NLP. EX Squared is a certified Optimizely and Sitecore partner and focuses on building enterprise-scale digital products and advanced AI-driven solutions for large B2B clients.

📋 Description

• Build and extend features across a large Rails 8 application, including models, controllers, background jobs, and server-rendered views • Develop interactive front-end experiences using Hotwire, Turbo Drive, Turbo Frames, Turbo Streams, Stimulus, and Tailwind CSS • Improve and extend an internal Rails-based CMS and contribute to component-based content authoring experiences • Build and strengthen integrations with third-party ticketing, event-management, and CRM platforms using REST APIs, webhooks, and scheduled synchronization • Design resilient integrations with retry logic, idempotency, failure handling, and automated reconciliation • Build and operate Sidekiq workflows with attention to concurrency, ordering, and failure scenarios • Design and develop versioned APIs supporting mobile applications and downstream consumers • Improve application and PostgreSQL performance ahead of high-traffic seasonal events • Implement caching strategies, contribute to load testing, and support CDN and automated scaling initiatives • Write meaningful automated tests and contribute actively to code reviews and technical decision-making • Contribute to a multi-year modernization program for a major media and entertainment platform

🎯 Requirements

• 5+ years of professional Ruby on Rails experience, including substantial experience working within large existing production codebases • Recent experience with Rails 7 or Rails 8 • Strong production experience with Hotwire, Turbo and Stimulus • Strong PostgreSQL knowledge, including schema and index design, query optimization, EXPLAIN analysis, and N+1 troubleshooting • Experience designing background jobs using Sidekiq or equivalent, including retry strategies, idempotency, queue isolation, and failure handling • Strong experience integrating third-party APIs and webhooks • Automated testing experience with RSpec or Minitest, request specs, and system/integration testing with Capybara • Strong semantic HTML and Tailwind CSS skills • Experience building accessible interfaces aligned with WCAG 2.1 AA • Familiarity with authentication, authorization, OAuth2/OIDC, token/session management, and role-based access control • Experience with observability practices including structured logging, metrics, and APM tools • Strong communication skills and the ability to work proactively within distributed teams • Advanced English; professional fluency in written and spoken English • Candidates must be based in Latin America, excluding Costa Rica • Ability to maintain at least 4 hours of daily overlap with Eastern Time • Fixed-term contractor availability

🏖️ Benefits

• Competitive compensation in USD • Access to learning platforms and professional development opportunities • Flexible remote work environment • Collaborative and multicultural teams • Opportunity to contribute to a large-scale, high-traffic digital platform with real production impact