# Senior/Staff Fullstack Engineer
**Company:** [Blackbird.xyz](https://hotfix.jobs/companies/blackbird-xyz)
**Location:** New York, NY, New York
**Salary:** $180K-$240K
**Experience:** 5+ years
**Skills:** React, TypeScript, Next.js, WebSockets, Datadog, Amplitude, Pos Systems, Payments Infrastructure
**Posted:** 2026-02-12
> 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.
## Job Description
## 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)
**Apply:** https://hotfix.jobs/jobs/senior-staff-fullstack-engineer-at-blackbird-xyz-2695d63f-22ae-4a6f-927a-7a6b88f2c358
**Canonical:** https://hotfix.jobs/jobs/senior-staff-fullstack-engineer-at-blackbird-xyz-2695d63f-22ae-4a6f-927a-7a6b88f2c358