# Senior Rails Engineer -- Fintech Platform (Thoughtful Applications Only -- Cover Letter Required) at Topkey

- Company: Topkey (YC W21)
- What the company does: Topkey helps vacation & short-term rental managers automate finances and bookkeeping. PMS integrations, corporate cards, expense management, banking, owner/vendor payments, and more. Backed by Y Combinator, a16z and Felicis.
- Company website: https://www.topkey.io/
- Type: Startups
- Level: Senior
- Location: Miami, FL, US / Nashville, TN, US / Remote (US)
- Work setup: Remote
- Posted: 2025-05-06
- Apply by: 2026-10-08
- Apply: https://www.ycombinator.com/companies/topkey/jobs/bjPI5a8-senior-rails-engineer-fintech-platform-thoughtful-applications-only-cover-letter-required
- Page: https://www.1752.vc/careers/jobs/topkey-senior-rails-engineer-fintech-platform-thoughtful-applications-only-cover/

## About the role

*Topkey is a financial technology company and is not a bank. Banking services provided by Thread Bank; Member FDIC.

## What they're looking for

- Applications without a personalized cover letter will not be considered
- Generic or AI-generated applications will be automatically rejected. We're looking for engineers who are passionate about Rails - when applying, mention your favorite gem and a brief reason why
- We value authentic communication and want to hear YOUR voice
- 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

Tags: Engineering