Skip to content
Blackbird.xyzBlackbird.xyzNew York, NY

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 – 240k/yr
On-site5+ YOEFullstack Engineering

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

Similar roles

Fullstack Engineering jobs
xAI

Member of Technical Staff

xAIPalo Alto, CA

Member of Technical Staff responsible for building scalable backend services, storage systems, and frameworks. Requires 1+ years experience with Java/Scala/Python/NodeJS/React, LLMs, recommendation algorithms, Docker/Kubernetes, probabilistic modeling, and safety content classification.

180k – 220k/yr
On-site1+ YOEFullstack Engineering
Turion Space

Staff Software Engineer-Enterprise Tech

Turion SpaceIrvine, CA

Lead full-stack engineering for Hyperdrive, Turion's AI-first enterprise platform. Architect scalable React dashboards, distributed data systems, and LLM integrations that automate aerospace operations.

180k – 231k/yr
On-site7+ YOEFullstack Engineering
Skylight

Senior or Staff Growth Engineer

SkylightNew York +1

Builds and iterates on growth experiments in Shopify e-commerce and React Native apps to boost subscription attach rates and retention. Requires 5+ years in TypeScript/React, A/B testing expertise, and focus on business outcomes.

180k – 220k/yr
Remote5+ YOEFullstack Engineering
Patch

Product Engineer (Senior / Staff+)

PatchSan Francisco, CA

Owns end-to-end product surface area for environmental commodities platform: understands customer problems, shapes solutions with Product/Design, and ships reliable software. Requires strong product mindset, ownership, collaboration, AI-native workflows, and engineering fundamentals for senior/staff+ scope.

180k – 230k/yr
On-siteFullstack Engineering
xAI

Member of Technical Staff – Web Foundations

xAIPalo Alto, CA

Fullstack web engineers with frontend passion architect and optimize user-facing features for real-time conversations, handling dashboards, analytics, and scalable systems. Requires 2+ years experience, expertise in TypeScript, Node.js, React, and modern CSS.

180k – 440k/yr
On-siteFullstack Engineering