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Why this grade This listing scored 65/100, which is a C. It lost the most ground on freshness. See the breakdown
- Pay transparency 25 / 25 A published salary range, worth more than any other single factor because it is what a candidate cannot find out without applying.
- Description depth 20 / 20 How much the posting actually says about the work, measured in characters of real text.
- Remote clarity 15 / 15 Whether "remote" means anywhere, or is quietly restricted to one country.
- Role specificity 6 / 10 Whether the listing is tagged well enough to tell what the role actually is.
- Corroboration 5 / 10 Whether more than one source carries this listing.
- Freshness 4 / 15 How recently it was posted. Older postings are likelier to be filled or abandoned.
-10 Ghost-job penalty — Deducted for signals that this posting may not be a real, currently-open role — staleness, repeated relisting, or talent-pool language.
Every figure above is arithmetic over the posting itself — its salary field, its text, its age, its tags and how many sources carry it. How the grades work →
Ruby on Rails Ruby freelance Engineering
Senior Backend Engineer (Ruby on Rails)
About the Role
We are seeking a Senior Backend Engineer with strong Ruby on Rails experience to support critical upgrades across our existing platform. The ideal candidate will have deep experience working in monolithic applications and be comfortable upgrading major dependencies and infrastructure components in a production environment.
This role will focus on modernizing and maintaining a legacy codebase while ensuring stability and performance during system upgrades.
Key Responsibilities
- Lead upgrades of core backend technologies within a Ruby on Rails monolith
- Upgrade and maintain Ruby and Rails versions across the application
- Support upgrades of key infrastructure components including Redis, MySQL, and Sidekiq
- Assist with upgrading Node.js dependencies within a legacy frontend project
- Identify potential compatibility issues and implement solutions to ensure system stability
- Collaborate with engineering teams to safely deploy upgrades and maintain production reliability
Required Qualifications
- Senior-level experience developing backend systems with Ruby and Ruby on Rails
- Experience working within large monolithic applications
- Strong experience performing major package or framework upgrades in production systems
- Ability to troubleshoot compatibility issues and refactor code where necessary
- Strong understanding of backend system architecture and dependency management
Nice to Have
- Experience with TypeScript
- Experience with Node.js
- Familiarity with modernizing legacy systems or incremental architecture improvements
Example Projects
- Ruby version upgrade within a monolith project
- Rails framework upgrade
- Redis upgrade
- MySQL upgrade
- Sidekiq upgrade
- Node.js upgrade within a legacy frontend codebase
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Where this listing came from
- 13 Aug 2026 Braintrust first sighting
Seen on 1 board over 0 days.