Senior Software Engineer, Developer Platform

About Warp Warp is the AI-native Employee Management Platform for ambitious companies. Our platform includes HRIS, payroll, IT, benefits, tax compliance, and more—all built from scratch on an AI-native architecture from day 1. Warp embeds itself into every part of a company's people operating layer, processing over half a billion dollars annually in payroll and on track to grow to $2B. Legacy vendors in our space have built their businesses by profiting from complexity. Warp is built from day one for AI to be the primary operator, not a feature. Every advance in LLM capability widens our lead. We hire people who ship constantly, own outcomes, and care about craft. We're in the office five days a week because speed and proximity are a competitive advantage at this stage. If you want to build something that automates an entire category of core work, not just another point solution, this is the place. We've raised over $85M from top investors like Ashton Kutcher/Sound Ventures, Y Combinator, the founders of Dropbox, Replit, SV Angel, and Homebrew Capital. Built by an obsessive team from MIT, Ramp, Brex, Google, Dropbox, Apple, and more. About the Role As a Senior Software Engineer focused on Developer Platform at Warp, you'll build the external-facing API layer that lets companies programmatically control payroll, benefits, HR, IT, and more. That means designing robust APIs, building OAuth flows and authentication infrastructure, webhook delivery systems, event log infrastructure, and the products that make them queryable. You'll own the full developer experience, from the reliability of the underlying platform to the clarity of the docs, and be the primary interface between Warp's core systems and the developers who build on top of them. What You’ll Do Design, build, and maintain Warp's external APIs Build webhook infrastructure: reliable delivery, retries, failure visibility Build event log systems and make them queryable by customers and partners Build OAuth and authentication infrastructure for third-party integrations Own SDK generation and developer tooling Write and maintain developer documentation Handle technical communications with integration partners and enterprise customers Define the API platform roadmap in collaboration with the CTO You’ll Be Good for This Role If You Have built developer-facing APIs and platforms that external developers rely on Have experience building webhook systems, event streaming, or audit log infrastructure Care deeply about API ergonomics, consistency, and documentation quality Have owned a developer platform or external API at a high-growth startup Understand the hard parts of external APIs: idempotency, versioning, backwards compatibility, and graceful failure Are comfortable being the face of Warp's API: writing docs, talking to developers, owning the experience What You Need 5+ years of software engineering experience Experience building and maintaining public-facing APIs at scale Experience with SDK generation or developer tooling Strong written communication skills Willingness to work from our NYC office five days a week Benefits at Warp 100% Health Coverage: Comprehensive medical, dental, and vision plans for you and your dependents. 401(k) Matching: Start investing in your future from day one. Unlimited PTO: Flexible PTO, meaning you’re trusted to take the time you need to recharge while balancing your responsibilities and team commitments. Commuter Benefits: Pre‑tax commuter benefits for your daily trip to our NYC office. Catered Lunch Daily: Great food, every day, on us. No meal prep, no decision fatigue. Quarterly Offsites: Beautiful locations to connect as a team. Past locations include Spain and Catskills. Warp is based in New York City, and we prioritize candidates who can commit to being on‑site 5x per week. Please refer to the top of this page for this position's hiring location. #J-18808-Ljbffr