Senior/Staff Fullstack Engineer at Blackbird Labs

About Blackbird: Blackbird Labs is a loyalty and payments platform establishing meaningful connections between the world’s best restaurants and their customers. Served up in 2022 by Ben Leventhal, co-founder of Eater and Resy, Blackbird offers a fully customizable loyalty programming platform for restaurants and a consumer app designed to make every guest feel like a bonafide VIP no matter where they dine. Backed by Union Square Ventures, a16z, Amex Ventures, Variant Fund, and other forward-thinking investors, Blackbird is out to revolutionize the restaurant industry. About Our Team: At Blackbird, our values guide everything we do and our talent principles define the key traits we seek in our employees. We have passion for our product – committed to our mission and instinctively think like and go the extra mile for our customers. We are elite performers – striving for excellence, going above and beyond to achieve exceptional results, and learning quickly with horsepower, drive, and grit. We make others better – taking initiative to elevate others, giving and receiving feedback, and championing a culture of growth. We hold one another accountable to living out our talent principles as we march together to achieving our mission. About the Job Blackbird is looking for a Senior Fullstack Engineer to own Flycar, our restaurant payments terminal used by thousands of restaurants. You'll build the software servers and managers rely on during every service, where downtime means a dining room that can't close checks. This is a Next.js/TypeScript monorepo powering multiple apps across payments, loyalty, and restaurant operations. You'll work primarily in Flycar but contribute across the platform. 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 6+ 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 Pay Transparency Notice & Benefits Depending on your work l