Description
As a Ruby on Rails Developer, you'll work on a production Rails application that includes customer-facing features, internal systems, and external integrations. This is an end-to-end ownership role; you'll take features from design and implementation through testing, performance tuning, and production readiness.

Responsibilities:
- Design, build, and maintain features in a modern Rails codebase.
- Own background and asynchronous workflows, including retries, idempotency, throughput, and observability.
- Model, query, and optimize data storage in PostgreSQL.
- Diagnose and resolve production issues in collaboration with product and support.
- Improve system reliability, performance, and operational safety.
- Contribute to long-term code health through refactoring, testing improvements, security practices, and thoughtful code review.

Technical Stack:
- Ruby and Rails 8.x
- Redis-backed background job systems
- Hotwire, Turbo, Stimulus-style JavaScript, and modern asset tooling such as esbuild and Tailwind-style CSS
- Observability tooling including APM, error tracking,



logging, metrics, and rate limiting
- Comprehensive automated testing across unit, integration, and system layers

Requirements
- C1 English proficiency or equivalent.
- Senior-level, hands-on experience building and operating production Ruby on Rails applications.
- Strong background in background job systems and asynchronous processing, with real-world operational experience.
- Experience designing and querying relational data models in PostgreSQL, with attention to indexing and performance.
- Experience building external-facing APIs with authentication, authorization, and rate limiting.
- Strong testing discipline and experience diagnosing flaky or non-deterministic tests.
- A security-minded approach to application design and production operations.

Preferred Qualifications
- Experience working at high-growth startups.
- Experience building products using LLMs or LLM-based agents (Lang

📌 Ruby on Rails Developer (Ciudad de México)
🏢 SUR
📍 Ciudad de México