Ruby on Rails Jobs

I’m expanding our engineering group to tackle several green-field products that blend full-stack web work with a major AI initiative. My most urgent need is someone who lives and breathes machine learning—specifically model training and optimisation—and is comfortable doing it in Python. You’ll take ownership of the entire training workflow: building data pipelines, crafting efficient training loops, fine-tuning models, and squeezing every drop of performance out of our GPU clusters on AWS. Because the broader team also works in Rust micro-services and Ruby on Rails APIs, an appreciation for end-to-end software delivery is important; your models will eventually power customer-facing features served from those back-ends. Core responsibilities • Design and impl...

I need a small, fast-moving team that already knows the Frappe Framework, ERPNext and FastAPI. We are starting with a clean install, so you will handle both the initial system setup and the development of two fully-featured custom modules: • Inventory Management • CRM The workflow will follow standard Frappe app conventions and must plug into ERPNext’s permission, reporting and workflow engines exactly as the core modules do. All APIs exposed to front-end or third-party tools should be built with FastAPI and documented with Swagger / OpenAPI. Key expectations • Spin up the ERPNext environment (v14 or newer) and version-control everything in Git • Design DocTypes, scripts, print formats and reports for each module • Build REST endpoints with FastAPI...

About the Opportunity I'm looking for a reliable and experienced Ruby Developer to collaborate with me on a long-term basis. This is a remote position with a fixed monthly salary, offering stable, ongoing work rather than short-term contracts. Requirements 2+ years of professional experience with Ruby/Ruby on Rails Strong understanding of Git and GitHub workflows Ability to fix bugs, implement features, and review pull requests Must be able to read and understand Japanese documentation, issues, and comments without using translation tools Speaking or writing Japanese is not required Good written English communication Responsible, proactive, and able to work independently Nice to Have Experience with PostgreSQL, Redis, Sidekiq, Docker Familiarity with CI/CD and automated testing Expe...

I need a seasoned Ruby engineer (around five years’ hands-on work) to help me build and continuously improve a production-grade web application running on Ruby on Rails. You will dive straight into an existing codebase, shape new features from scratch, and keep the current ones lean, secure, and well-tested. Day-to-day you’ll be pairing with me on feature planning, writing clean Ruby, refining ActiveRecord queries, introducing service objects where it makes sense, and pushing everything through Git-based workflows with peer reviews and CI. Solid knowledge of Rails conventions, background jobs, caching, and test-driven development is essential because we rely heavily on RSpec and Capybara for stability. I will give you clear tickets, Figma screens, and access to the staging en...

automation builder who can independently create workflows using AI, Make, Zapier, GoHighLevel, APIs, and advanced CRM systems.