Compensation: Competitive, commensurate with experienceAbout TopkeyTopkey is a rapidly-growing fintech platform for short-term rental managers. We offer deposit accounts, credit cards, full bill-pay, external cards, and expense management—all in one Rails monolith on the latest Ruby/Rails. With $1M+ ARR, zero churn (at the time of posting this), and a small, tight-knit engineering team, you’ll have a huge impact on our roadmap, our stack, and our customers’ success.We’re backed by top-tier investors like Felicis Ventures, Andreessen Horowitz (a16z), and Y Combinator. Topkey is recognized as one of the top emerging vertical startups, and our trajectory is steep. We’re looking for driven individuals to join our team and help shape the future of financial infrastructure in the $110 billion hospitality market.Own features end-to-end in our Rails monolith (Rails 8+, Ruby 3.x)Build rich, reactive UIs with Hotwire/Turbo, Stimulus, and Tailwind CSSIntegrate securely with external APIsCollaborate closely with product, design, and support to turn customer insights into polished featuresMentor junior engineers and help establish best practices around code quality, testing, and CI/CD (we use RSpec, GitHub Actions, Heroku/AWS)Optimize performance, reliability, and scalability of our core platformParticipate in architecture discussions—help us evolve our beautiful monolithYou Have5+ years building production-grade Rails applicationsDeep expertise in Ruby, Rails conventionsStrong front-end chops: Stimulus controllers, Turbo frames, Tailwind components, vanilla JS where neededExperience designing and consuming REST APIsSolid SQL skills (PostgreSQL) and an eye for data modelingTrack record writing maintainable test suites (RSpec/Minitest) and CI pipelinesComfort with cloud-hosted deployment (Heroku, AWS) and infrastructure as code basicsExcellent communication skills and comfort working asynchronously in a remote-first teamNice-to-HavesPrevious fintech or payments or accounting experienceFamiliarity with Plaid, Stripe, or similarExperience with performance tooling (NewRelic, Scout, etc.)Open-source contributions or personal projects you’re proud ofRemote-friendlyUnlimited PTO and paid holidaysEquity in a high-growth startupHome-office setup budgetHealth, dental, and vision insurance (U.S.) + 401(k) match—*Topkey is a financial technology company and is not a bank. Banking services provided by Thread Bank; Member FDIC.How to ApplySend a resume, a brief cover letter explaining why Topkey excites you, and links to any public code (GitHub, open-source PRs, personal projects) to [email protected] with subject line “Senior Full-Stack Engineer”. We read every application—no bots, no generic templates. Show us what makes you uniquely you! #J-18808-Ljbffr