The Role We are looking for a Senior Fullstack Ruby on Rails Developer to join one of our high‑growth client teams. In this role, you will be a key driver of the application's lifecycle, writing clean, idiomatic Ruby code to build robust backend features while ensuring a smooth, highly interactive frontend user experience. You will help the client leverage the \"Rails way\" to ship features quickly, without sacrificing long‑term maintainability, testability, or performance. This is an ideal position for a developer who appreciates the elegant architecture of Rails but understands how to optimize database queries, scale background workers, and deliver a modern interface. Qualifications 5+ years of production experience building and scaling applications using Ruby on Rails (Rails 6/7) and modern Ruby 3.x features. Strong proficiency with frontend assets in Rails. This includes deep experience with Hotwire (Turbo/Stimulus) OR modern SPA frameworks like React.js or Vue.js connected via a Rails API. Deep knowledge of PostgreSQL or MySQL, specifically in writing complex ActiveRecord queries, optimizing indexes, and managing database migrations safely at scale. Extensive experience managing background jobs, race conditions, and heavy data processing using Sidekiq and Redis. A strict habit of writing maintainable test suites using RSpec, Capybara, or FactoryBot to ensure high test coverage and stable deployments. Proven track record of designing, securing, and documenting clean RESTful APIs. Solid understanding of Git workflows, Docker containerization, and asset compilation pipelines (Propshaft, Webpacker, or Vite Ruby). Nice‑to‑Have Experience migrating legacy Rails applications to newer versions. Familiarity with cloud platforms (AWS, Heroku, or Render) and CI/CD pipelines. Understanding of domain‑driven patterns within Rails to keep large codebases decoupled. Knowledge of web security best practices (OWASP Top 10, cross‑site scripting prevention). Responsibilities Design, architect, and implement clean, test‑driven features across both the backend and frontend layers. Profile and optimize slow queries, eliminate N+1 query bugs, and optimize frontend rendering paths to keep application response times low. Participate in rigorous peer code reviews, championing idiomatic Ruby patterns, security protocols, and robust architectural choices. Act as a technical sounding board for Product and Design teams, helping evaluate the technical feasibility of upcoming features. Assist in maintaining and improving deployment workflows to ensure reliable, zero‑downtime releases. Benefits Pay reliability: No more unreliable clients. Enjoy on‑time monthly payments with flexible withdrawal options. Predictable hours: Enjoy a harmonious work‑life balance with consistent 8‑hour working days with clients. Flex days: Enjoy up to 24 flex days off per year without losing pay, for full‑time positions found through Proxify. Career‑accelerating opportunities: Discover exclusive long‑term remote positions at the world's most exciting companies. Hand‑picked matches: Skip the typical recruitment roadblocks and biases with personally matched positions. Seamless process: A one‑time contracting process for endless opportunities, with no extra assessments. Consistent compensation: Enjoy the same pay, every month with positions landed through Proxify. #J-18808-Ljbffr