Senior Full-Stack Engineer

What You'll Do

• Own features end-to-end in our Rails monolith (Rails 8+, Ruby 3.x)
  
• Build rich, reactive UIs with Hotwire/Turbo, Stimulus, and Tailwind CSS
• Integrate with external APIs (Plaid, Stripe, Unit, etc.) securely and robustly
• Use large context LLMs (Claude, Gemini, ChatGPT, etc.) to accelerate coding, QA, and spec writing
• Participate in architecture discussions -- help us evolve our beautiful monolith
  
• Work closely with product and founders to take specs from prototype to prod
  
• Ship daily/weekly, review critically, and treat AI as a multiplier—not a replacement for good judgment
  
• Optimize performance, reliability, and scalability of our core platform
  
• Act as your own pair programmer—debugging, prompting, reviewing AI-generated code for quality (the eng team will also review, but the initial onus is on the contributor)
  

You Have

• 5+ years building production-grade Rails applications
  
• Deep expertise in Ruby, Rails conventions, background jobs, and service objects in a growing monolith
• Confidence reviewing, prompting, and editing AI-generated code from tools like Claude, Devin, Gemini, Cursor, etc.
• A reflexive approach to using AI in specs, code, QA, testing, and documentation
  
• Strong front-end chops: Stimulus/turbo/hotwire, components, etc.
• Experience designing and consuming REST APIs
  
• Solid SQL skills (PostgreSQL) and an eye for data modeling
  
• Track record writing maintainable test suites (RSpec) and CI pipelines
  
• Comfort working autonomously and asynchronously in a high-trust, high-output team
  

Nice-to-Haves

• Previous fintech or payments or accounting experience
  
• Familiarity with Plaid, Stripe, or similar
• Experience with observability tooling (NewRelic, Honeybadger, etc.)
  
• Open-source contributions or personal projects you’re proud of
• Contributions to open-source or side projects involving AI/LLMs
• Using Repomix or similar tooling for large-scale code summarization and reasoning
  

Perks & Benefits

• Remote-friendly
  
• Generous PTO and paid holidays
  
• Equity in a high-growth startup
  
• Generous professional development stipend
  
• Home-office setup budget
• Health, dental, and vision insurance (U.S.) + 401(k) match

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