Ruby Developer

Title - Ruby Developer

Type - Contract

Location - Remote

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 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 experience with ActiveRecord, including query optimization and data modeling at scale.
• Proven experience working on large-scale distributed systems beyond traditional CRUD-based applications.
• Strong experience with unit and integration testing using Minitest and/or RSpec.
• Hands-on experience with Sidekiq or equivalent background job processors.
• Experience profiling and optimizing Ruby applications for CPU, memory, and throughput.
• Familiarity with messaging systems such as Kafka or equivalent (RabbitMQ, SQS, etc.).
• Experience working with legacy codebases and modernizing them incrementally without destabilizing production.
• Strong analytical and problem-solving skills with a production-first mindset.
• Excellent communication skills and the ability to collaborate effectively within cross-functional teams.

Tools and Technologies

Backend & Frameworks

• Ruby, Ruby on Rails
• ActiveRecord