Morgana B.
Senior Ruby on Rails Developer | AI-Assisted Engineering & Performance
Senior Ruby on Rails developer with 6+ years shipping and scaling production Rails applications, who also builds the AI-assisted development tooling that makes teams faster. I work at two levels: Rails engineering you can rely on. Full-stack work across backend, APIs, and frontend on Rails monoliths. I lead framework upgrades (Rails 7.0 → 8.1, Ruby 3.4), diagnose and fix performance bottlenecks (N+1 queries, missing eager loading, caching gaps), and maintain solid RSpec test suites in Dockerized CI environments. I design RESTful APIs (Active Model Serializer, API versioning), work with PostgreSQL and Active Record at an advanced level, integrate search (Elasticsearch, Solr) and third-party services (Stripe, Iugu, Mailchimp, HubSpot), and deploy on AWS and Heroku with New Relic observability. AI-assisted engineering that scales across a team. I was one of the leads implementing my team's AI harness engineering — surveying adoption, then designing and shipping the shared patterns and tooling that scale across developers. That means not just installing a tool, but building the harness around it: shared CLAUDE.md patterns, hooks, MCP server integrations (read-only Postgres for in-conversation database investigations, New Relic for performance analysis), skills, and slash commands. I've also automated real parts of the development cycle, including code-review and PR-opening workflows. I maintain nitrorails, an open-source multi-platform AI coding-agent plugin (Claude Code, Cursor, Codex, Copilot CLI, Gemini CLI) for Rails performance optimization. I'm also a published Rails technical writer. How I can help you: - Build or extend a Rails application (backend, API, or full-stack) - Rescue and modernize a legacy Rails codebase (version upgrades, performance, test coverage) - Diagnose and fix performance problems on high-traffic apps - Set up AI-assisted development workflows for your team (Claude Code, MCP servers, custom skills, PR automation)
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3.7k
Billed in all: $16,212$16k
$3.7k in the last 6 months
Across 11 contracts
Earnings, last 30 days
Skill rankings: Top 9% in Heroku
Ranked by MRR among everyone on Upwork with the skill.
- #31RSpec180 freelancers · 🇧🇷 #1Top 17%🇧🇷#1 of 1
- #36Heroku390 freelancers · 🇧🇷 #2Top 9%🇧🇷#2 of 3
- #249Ruby on Rails1,811 freelancers · 🇧🇷 #5Top 14%🇧🇷#5 of 33
- #308API Testing1,365 freelancers · 🇧🇷 #2Top 23%🇧🇷#2 of 4
- #379GitHub2,823 freelancers · 🇧🇷 #10Top 13%🇧🇷#10 of 44
- #772Bootstrap6,899 freelancers · 🇧🇷 #6Top 11%🇧🇷#6 of 38
- #1,272API Development6,848 freelancers · 🇧🇷 #14Top 19%🇧🇷#14 of 60
- #2,608PostgreSQL12,850 freelancers · 🇧🇷 #24Top 20%🇧🇷#24 of 160