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Senior Fullstack Ruby on Rails Developer at Proxify. Location Information: CET (+/- 3 hours). About us:. .  . . Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction. 🙂. . Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives.. . Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.. .  . . 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.. .  . .  . . What we are looking for:. . . 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.. . .  . . What we offer:. .  . . Get paid, not played. . No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.. .  . . Predictable project hours. . Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.. .  . . Flex days, so you can recharge. . Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.. .  . . Career-accelerating positions at cutting-edge companies. . Discover exclusive long-term remote positions at the world's most exciting companies.. .  . . Hand-picked opportunities just for you. . Skip the typical recruitment roadblocks and biases with personally matched positions.. .  . . One seamless process, multiple opportunities. . A one-time contracting process for endless opportunities, with no extra assessments.. .  . . Compensation. . Enjoy the same pay, every month with positions landed through Proxify.