Ruby On Rails Engineer

🏔️ 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 Contract type: CLT (Brazilian labor regime) via Deel Employer of Record. Salary is communicated in USD equivalent and paid in fixed BRL via Deel (Employer of Record). Your salary in BRL does not fluctuate with the exchange rate — it is set at a fixed amount in local currency, per Deel EOR compliance. Benefits - Payroll Cycle: Monthly - PTO: 30 days per year - Vacation Bonus (Adicional de Férias or Abono de Férias) - Employee receives 133% of their standard salary during vacation and is paid to employees with at least 12 months of service when they take vacation. - Sick Leave: 15 days - Annual 13th Month Salary Pay - National Public Holidays Off (variable by region): 12 - Social Insurance (INSS) which includes - Public Healthcare - State Pension Fund - RGPS - Meal Voucher (via Flash Benefícios) - R$40 per business day, prorated based on days worked - Attendance Bonus (Prêmio de Boa Permanência): - R$110.00/month added to food card if employee has no absences that month - CBA/Union Bonus (Profit Sharing) Participação nos Lucros e Resultados (PLR) - R$351.60 a year. Employees with 12 months of service receive the full amount, otherwise it is prorated. Paid in March and August - Life Insurance