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.

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