Ruby Backend Developer

Job Title: Ruby Backend Developer – Distributed Systems Location: 100% remote India Duration: 12 months with longer extension Fulltime contract (8 hours per day/40 hours per week) Working time zone: USA 9 AM to 4 PM PST mandatory Roles and Responsibilities Re-design, modify, and scale distributed backend systems primarily built in Ruby on Rails to support horizontal scalability and SaaS multi-tenancy. Re-write and modernize legacy Ruby components to improve performance, reliability, and long-term maintainability. Design, implement, and optimize policy computation, policy distribution, and workload segmentation at a massive scale. Build and enhance asynchronous job processing, batch processing, and parallel execution pipelines using Sidekiq. Actively profile and optimize system performance using tools such as stackprof, ruby-prof, and memory profiler. Identify and resolve performance bottlenecks, memory issues, and blocking components in production systems through profiling, refactoring, and architectural improvements. Improve and maintain messaging and caching pipelines using Kafka (or equivalent) and Redis / Firefly. Collaborate closely with platform and architecture teams during the gradual transition of parts of the system to Java, while continuing to evolve and maintain the Ruby core. Debug and resolve complex production issues independently, owning problems end-to-end from diagnosis through resolution. Contribute to cloud-native deployments and infrastructure workflows, working alongside DevOps teams using Kubernetes. Take strong ownership of system health, performance, and scalability, proactively identifying risks and improvement opportunities. Qualifications Bachelor's degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience). 5+ years of backend software development experience, with a strong focus on Ruby and Ruby on Rails. Deep hands-on expe