Senior/Lead Software Engineer, Platform

Alloy is where you belong! Alloy helps solve the identity risk problem for companies that offer financial products by enabling them to outpace fraud and confidently serve more people around the world. Over 800 of the world’s largest financial institutions and fintechs turn to Alloy to take control of fraud, credit, and compliance risk, and grow with the clearest picture of their customers. Through our values: Be Bold, Get Scrappy, Collaborate, and Celebrate Our Differences, we are creating a workplace where you can grow, thrive, and belong. See how we’ve been continuously recognized and named one of Inc. Magazine’s Best Workplaces , Forbes America’s Best Startup Employers , Best Fintech to Work for by American Banker , year after year. Check out our investors and read more about us here . About the team Alloy's engineering org is built around speed, ownership, and deep collaboration. Our Platform and Infrastructure/Site Reliability teams report into the same leadership, which ensure seamless cross-team collaboration. Platform engineers here don't just build APIs in isolation, they work hand-in-hand with SRE to think about how systems run, scale, and recover in production. It's a setup that rewards engineers who care about the full lifecycle of the software they ship. The backend powers everything from fraud detection and transaction classification to data ingestion and third-party integrations. We are a high performing team where engineers have significant ownership over core systems. There’s no separate “architecture layer”—the people writing the code are the ones making the decisions. We're a hybrid team based in Greenwich Village, NYC, and we're looking for someone local to the Greater NYC area who will attend the office Tuesdays through Thursdays. What you'll be doing As a Senior/Lead Platform Engineer, you will: Architect and build backend systems. You'll own features end-to-end: from database design through to API endpoints, triggered events, and data pipelines. That means collaborating with Solutions Architects and Product Managers to spec out what clients actually need, then making it real in Node.js with a Postgres backend. Partner with Infra and SRE. With Platform and Infra/SRE under the same roof, you'll be involved in conversations about reliability, deployment, and production health– not just as a consumer of infrastructure, but as a collaborator. Observability, failure modes, and operational readiness are part of how we build at Alloy. Drive platform-level initiatives. Beyond feature work, you'll take on the kind of foundational improvements that make the whole team faster and more resilient, whether that's improving data ingestion pipelines, tightening up integrations with third parties, or reducing toil for the engineers around you. Own incident response and follow-through. When things break, you help get them back up. More importantly, you stick around for the blameless post-mortem and make sure the same thing doesn't happen twice. Mentor and multiply the team. You'll be given the trust and authority to tackle ambiguous, high-impact problems end-to-end, making architectural tradeoffs that hold up in production, and raising the bar for how the team builds and operates systems. Who we’re looking for Experience: 10+ years of production software engineering experience, with a track record of owning meaningful backend systems on a collaborative team. Technical depth: Strong command of our core stack, or the clear ability and willingness to get there fast: Node.js (TypeScript preferred) Data systems expertise : Deep expertise in relational databases and experience with analytical databases. You think in terms of query plans, indexing strategies, and data access patterns. Our data layer powers real-time decisions and analytics, so you’re expected to actively optimize how services interact with databases for performance, scalability, and reliability. Cloud expertise : You’re comfortable designing systems in public clo