Full Stack Developer

Magellan AI

. Add new features to the Ruby on Rails application across the full stack .

Posted 9/16/2026full-timeRemote • New York • United StatesMid-LevelSenior💰 $100,000 - $140,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Ruby on Rails application development, Agile methodologies, and AI coding agent management. Proficient in TDD, refactoring, and writing clear documentation for technical and non-technical audiences.

Highest-signal resume keywords

Ruby On RailsAgile DevelopmentTest-Driven Development (TDD)AI Coding AgentsPostgres

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentRefactoringSQLWeb ScrapingArchitecture Decision Records (ADRs)TurboStimulusPerformance TroubleshootingCLI HelpersMCP Server Design

Soft Skills

Clear WritingCollaboration

Tools & Technologies

ClickHouseAI Coding Agents

Industry Keywords

Ad TechLLM-Facing APIsPodcasting

Tech Stack

Tools & technologies

PostgresPythonRubyRuby on RailsSQL

About the role

Key responsibilities & impact

Add new features to the Ruby on Rails application across the full stack
Work with operations and sales to design professional, practical solutions
Direct AI coding agents by framing problems, specifying constraints, reviewing output, and owning results
Improve system and code quality through TDD and refactoring
Write specs, architecture decision records, and product documentation
Extend internal tooling, including skills, subagents, and CLI helpers
Build AI-facing product surfaces such as the Ad Intelligence MCP server, including authentication, policy gates, and audit logging
Enhance existing feature usability with Turbo, Stimulus, and other front-end improvements
Troubleshoot and fix performance issues and complicated logic across Postgres and ClickHouse
Simplify the system through sound design decisions
Experiment with stopgap solutions, scripting, SQL exports, and web scraping
Provide operational support and address bugs during normal business hours
Participate in internal hackathons
Collaborate through Agile development, collective code ownership, regular deployments, and retrospectives

Requirements

What you’ll need

3+ years of software development experience
Expertise with Agile web development, including practices such as TDD and refactoring
Fluency working with AI coding agents day to day, or obvious appetite for it
Ability to review AI agent output rather than trusting it
Clear writing for specifications, ADRs, and documentation read by non-engineers
Nice to have: Ruby on Rails
Nice to have: ClickHouse
Nice to have: Python
Nice to have: NYC-based
Nice to have: Experience designing MCP servers or other LLM-facing APIs
Nice to have: Background in ad tech
Nice to have: Interest in the podcasting world

Benefits

Comp & perks

Competitive base salary and bonus structure
Medical, dental, and vision coverage; individual coverage is free
Company-subsidized family coverage
Home office improvement reimbursement up to $500 per year
Company laptop and external monitor
11 company holidays
20 PTO days for vacation, illness, and personal time
Off-site retreats
Generous options grant