Ruby On Rails Engineer

Ruby on Rails Engineer

Remote · Brazil · Full-time

🏔️ About Sierra Studio

When you apply to Sierra, you join an ecosystem. We specialize in connecting talented Brazilian professionals with exciting career opportunities in a highly-vetted small community of growing companies in the US. Applying to Sierra seamlessly integrates you into this ecosystem, granting automatic eligibility for all relevant opportunities we offer.

💼 About Our Hiring Partner

Our hiring partner is a fast-growing, fully bootstrapped SaaS company in the e-commerce space. They build loyalty, memberships, and cash back infrastructure exclusively for Shopify brands — helping online stores increase customer lifetime value and retention. The company is ~20 people, fully remote, and scaling quickly.

🛠️ About the Role

As a Ruby on Rails Engineer, you'll work closely with a small engineering team to build and ship features on a Shopify app used by hundreds of brands. This is not a traditional "write code from scratch" role — the team operates a modern AI-assisted engineering workflow. Agentic tools propose plans and write code based on task tickets. Your job is to deeply understand the product and codebase, review and validate AI-generated proposals, catch what doesn't make sense, and ship confidently.

What You'll Do

• Review and validate AI-generated code proposals — understand the architecture, catch edge cases, approve or redirect

• Ship features end-to-end within a Shopify app

• Triage bugs and tasks; work with agentic coding tools to resolve them

• Maintain platform stability and code quality

• Collaborate closely with engineering leadership on product direction

• Help establish engineering practices as the team grows

What We're Looking For

• Strong Ruby on Rails experience, with hands-on Shopify app development

• Comfort working in an agentic coding environment — you know how to review AI-generated code critically

• Active GitHub: you've been shipping recently and consistently

• Familiarity with AI dev tooling (Claude Code, Codex, or similar) is a plus

• Startup mindset: scrappy, collaborative, no ego

• Strong written English communication

Compensation

$5,000–$7,000 USD/month, depending on experience.