Rails Foundation Contributing Member
Ruby on Rails consulting from engineers who work deep in Rails.
Saeloun helps teams modernize Rails applications, improve performance, untangle production issues, and ship product work with a senior Rails and React team in Boston and Pune.
- 599+
- engineering articles
- 2019
- founded in Boston
- Rails
- Foundation member
Latest Rails, React, and engineering articles
Field notes on framework changes, performance, upgrades, testing, and product engineering.
Building a Private Karpathy-Style LLM Wiki With gbrain and gstack
How I use a private Karpathy-style LLM Wiki, gbrain, and gstack to train an AI assistant on my own work signals for Rails development, writing, and reviews.
Different Approaches to Debugging Query Performance in Rails
A comprehensive guide to debugging and optimizing query performance in Rails applications using built in tools, gems, and database specific utilities for PostgreSQL, MySQL, and SQLite.Ruby Concurrency Beyond Fibers: Threads, Ractors, and True Parallelism
A practical guide to Ruby's concurrency primitives beyond fibers, covering Threads, Ractors, and how to achieve true parallel execution in Ruby applications.Upgrading from Rails 7.2 to Rails 8 - The Latest and Greatest
A practical guide to upgrading from Rails 7.2 to Rails 8 with Solid Queue, Solid Cache, built-in authentication, and Ruby 3.4 performance improvements.Upgrading from Rails 6.1 to Rails 7 - The Modern Stack
A practical guide to upgrading from Rails 6.1 to Rails 7 with Import Maps, Hotwire, Ruby 3 compatibility, and encrypted attributes.From Idea to Launch: Why Rails Remains the Ultimate MVP Framework in 2026
Discover why Ruby on Rails remains the go to framework for building MVPs quickly and efficiently, helping startups validate ideas and reach market faster.
Rails 8.1 introduced except_on option for validations and callbacks
To skip validations for particular contexts, Rails added `except_on` option for validations and callbacks.
Mobile First Design for Consultancies
A practical look at why designing for mobile first helps consultancy websites create better first impressions improve usability and drive engagement.Rails 8.1 update_all with joins Support
Rails 8.1 has improved Active Record functionality by enhancing the support for update_all with joins for Postgresql and SQLite.
Rails 7.1 lets change_table pass validate_check_constraint
Rails 7.1 lets you define and validate check constraints in a single change_table block for cleaner migrations.