Lead Full-Stack Ruby on Rails Engineer (Go / AWS)

About The Opportunity We are seeking a Lead Full-Stack Ruby on Rails Engineer to drive the technical evolution of a global enterprise platform for one of the world’s most admired consumer technology innovators!

In this role, you will lead the architecture, feature development, and modernization of high-throughput web applications powering a global circular economy and electronic recyclables ecosystem, overseeing critical workflows across asset inventory, scheduling, global transportation, and sustainable processing.

If you thrive on solving complex distributed challenges, have deep mastery of the Ruby ecosystem, love working with cross-functional global teams, and bring an insatiable curiosity to learn and mentor, this challenge is for you.

Responsibilities

• Architect & Build: Lead the design, coding, testing, and evolution of scalable, high-performance web applications and services using Ruby on Rails (6/7) and modern engineering practices.
• Enterprise Integrations: Design and implement robust, secure API integrations with internal services and third-party global partners utilizing REST, RPC, ProtoBuf, JSON, and XML.
• Full-Stack Delivery: Bridge backend architectures with responsive frontend components using HTML5, CSS3, modern JavaScript, Bootstrap, and jQuery.
• Performance & Reliability: Identify performance bottlenecks, optimize database queries, enhance observability, and address system capacity and scalability limits.
• Polyglot & Cloud Collaboration: Collaborate across distributed microservices environments incorporating Go (Golang) services and cloud infrastructure on AWS.
• Engineering Excellence: Champion testing automation (RSpec, MiniTest) and automated delivery pipelines (CircleCI, Jenkins), conducting thoughtful code reviews and driving technical documentation.
• Stakeholder Leadership: Partner directly with global engineering resources, product owners, and external vendors in an agile, cross-cultural setting.

Required Qualifications

• 10+ years of professional software engineering experience, with deep, authoritative expertise in Ruby as a core language and the Ruby on Rails framework.
• Lead-level architectural acumen: Proven track record leading features, defining architectural guidelines, and modernizing large-scale production Rails applications.
• Extensive API Design & Integration: Deep hands-on experience designing and consuming distributed APIs (REST, RPC, ProtoBuf, JSON, XML).
• Working Frontend Proficiency: Solid experience developing clean, maintainable web interfaces (HTML5, CSS3, JavaScript, jQuery, Bootstrap).
• Automated Testing & CI/CD: Rigorous commitment to test-driven practices with RSpec and MiniTest, and continuous integration suites (CircleCI, Jenkins, GitHub Actions).
• English Proficiency: Fluent / Advanced professional English is mandatory, you must be completely comfortable leading technical discussions, writing documentation, and collaborating with international stakeholders in the US.
• Location: Must be permanently based in Brazil.
• Education: Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.

Nice To Have Skills

• Practical development experience with Go (Golang) in microservices environments.
• Experience with Amazon Web Services (AWS) (EC2, ECS, S3, RDS, IAM).
• Background in supply chain, logistics, circular economy, or high-volume transactional web applications.
• Experience modernizing legacy Rails applications (gem version upgrades, deprecation management, database partitioning).

Soft Skills & Cultural Fit

• Top-Tier Communication: Clear, structured, and proactive communicator who knows how to translate complex technical decisions to both engineers and business stakeholders.
• Continuous Learning Mindset: High intellectual curiosity, eager to dive into emerging patterns, tools, and polyglot challenges.
• Ownership & Quality Mindset: Uncompromising standard for clean code, reliability, and automated testing.