Jai R.

I’m a Senior Ruby on Rails Developer with 12+ years of experience building, scaling, and maintaining production-ready web applications, SaaS platforms, APIs, and complex backend systems. I have also led engineering teams and served as a CTO for a startup. I specialize in Ruby on Rails, Ruby, Rails 7/8, Hotwire, Turbo, Stimulus, Hotwire Native, REST APIs, GraphQL, PostgreSQL, Sidekiq, Redis, AWS, and AI/LLM integrations. Why Clients Hire Me for Ruby on Rails • 12+ years of Ruby & Ruby on Rails experience • Rails 3–8, including Rails 7/8 • Senior Full-Stack & Backend Ruby development • Hotwire, Turbo, Stimulus & Hotwire Native • REST API & GraphQL development • SaaS & multi-tenant architecture • PostgreSQL, Redis, Sidekiq & performance optimization • Action Cable, WebSockets & real-time applications • RSpec, Capybara, FactoryBot, TDD & BDD • Authentication, OAuth, JWT & application security • Docker, CI/CD, AWS & production scaling • Legacy Rails modernization, upgrades & refactoring Ruby on Rails Development Services I can help you with: • New Ruby on Rails application development • Existing Rails application development and maintenance • Rails 7 and Rails 8 upgrades • Ruby and Rails version upgrades • Rails API development • REST API and GraphQL development • SaaS application development • Multi-tenant Rails applications • Rails monolith and modular architecture • Hotwire / Turbo / Stimulus applications • Hotwire Native mobile applications • Background processing with Sidekiq and Redis • Real-time applications with Action Cable and WebSockets • PostgreSQL optimization and database architecture • Rails performance optimization • Security hardening and authentication • Legacy Rails application modernization • Third-party API and payment integrations • AWS deployment and DevOps • Testing, refactoring, and code quality improvement Hotwire, Turbo, Stimulus & Modern Rails I have hands-on experience building modern Rails applications using: • Hotwire • Turbo Drive • Turbo Frames • Turbo Streams • Stimulus JS • Hotwire Native • Tailwind CSS • ViewComponents • Service Objects • POROs • RESTful Rails architecture I follow the Rails Way and focus on keeping applications maintainable, testable, performant, and simple without unnecessary complexity. I’ve worked across FinTech, Real Estate, Healthcare, EdTech, Logistics, E-Commerce, SaaS, and marketplace products, helping startups and enterprises turn complex requirements into secure, scalable, high-performance applications. AI-Native Ruby on Rails Development I build AI-native applications and SaaS platforms by combining Ruby on Rails with modern LLMs, AI agents, RAG, vector databases, and intelligent workflow automation. I can help you build AI into the core product architecture, not simply add an AI API as a separate feature. My AI-native capabilities include: • AI-native SaaS application development • LLM application development and integration • OpenAI API and model integration • OpenAI fine-tuning • AI agents and agentic workflows • RAG (Retrieval-Augmented Generation) • Embeddings and semantic search • AI-powered search, recommendations, and personalization • AI classification and anomaly detection • AI workflow automation and productivity systems • LangChain and LlamaIndex • Vector databases: PGVector and Pinecone • AI-powered APIs and backend services • LLM-powered content generation and processing • Intelligent data extraction and analysis I combine Ruby on Rails, modern AI/LLM technologies, APIs, databases, and cloud infrastructure to build scalable AI-native products where intelligence, automation, and productivity are part of the core application architecture. Whether you’re building an AI-native SaaS product from scratch or transforming an existing Rails application into an intelligent platform, I can help design and implement the right architecture from MVP to production scale. Database, Cloud & DevOps • PostgreSQL • MySQL • Redis • Elasticsearch • AWS EC2 • AWS S3 • AWS Lambda • API Gateway • Elastic Load Balancing • CloudFront • Route 53 • ElastiCache • SQS / SNS • Docker / Docker Compose • CI/CD • Production monitoring • Application performance optimization API & Third-Party Integrations I have integrated Rails applications with payment, identity, communication, mapping, government, insurance, and other third-party APIs, including: • Stripe / Stripe Connect • PayPal • Square • Razorpay • PayU • PayFort • HyperPay • PayTabs • Twilio • Firebase • Google Maps • Identity verification APIs • Government and enterprise APIs Let's build your Rails application If you're looking for a Senior Ruby on Rails Developer with deep Rails experience, modern Hotwire expertise, strong backend/API skills, AWS knowledge, and AI integration capabilities, let's discuss your project. Send me your requirements, existing application details, or technical challenges, and I’ll help you determine the best approach.