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Senior/Staff Fullstack Engineer

Owns end-to-end development of Flycar restaurant payments terminal, building reliable UIs, APIs, WebSocket flows, and debugging real-time payments in a Next.js/TypeScript monorepo. Requires 5+ years React/TypeScript with real-time data and high-stakes software experience.

180k – 240kNew York, NYNew YorkFullstack EngineeringOnsite5+ YOE

About the role

Responsibilities

  • Own end-to-end development of Flycar - UI, API integration, WebSocket flows, and fallback handling when things go wrong
  • Build interfaces that work reliably across FSR and QSR environments with inconsistent hardware, spotty networks, and dozens of POS configurations
  • Drive frontend architecture decisions — you'll shape how we build, not just what we build
  • Debug real-time payment flows that span our terminal, mobile app, and backend services

Requirements

  • 5+ years with React and TypeScript
  • Experience with real-time data (WebSockets, polling) and graceful degradation on unreliable networks
  • Track record shipping software where failure has immediate, visible consequences — payments, POS, fintech, or similar
  • Comfort working across the stack: reading API contracts, debugging queries, reasoning about system design
  • Strong ownership instincts in a small, fast-moving team where scope is fluid

Nice to Haves

  • Experience with payments infrastructure, POS systems, or restaurant/hospitality tech
  • Background in multi-tenant systems or hardware-constrained environments (terminals, kiosks)
  • Exposure to blockchain, crypto, or web3
  • Experience with Datadog, Amplitude, or similar observability/analytics platforms

Compensation

  • Target annual salary: $180,000-$240,000 USD (does not include equity)

Skills

ReactTypeScriptNext.jsWebSocketsDatadogAmplitudePos SystemsPayments Infrastructure

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