Senior Software Engineer, Payments

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, we process over half a billion $ annually in payroll, on track to grow to $2B. Legacy vendors in our space 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. About the Role As a Senior Software Engineer focused on Payments at Warp, you'll build and own the financial infrastructure that powers Warp. Core ledgering, US and global payment rails, payroll engine, earnings calculations, tax engines, and the compliance layer around all of it. This is deeply technical work with real financial stakes. Very few engineers get to work on problems like this, at this scale, this early. You'll work directly with the CTO and have outsized influence over how we architect one of the most critical systems in the company. What You'll Do Own and scale Warp's core ledgering and payments infrastructure Develop and own the payroll engine, earnings engine, and tax engine Architect US and global payment rails for domestic and international payroll Build fault-tolerant, auditable financial systems designed to process billions of dollars Define the payments architecture roadmap in collaboration with the CTO You’ll Be Good for This Role If You Have deep experience in payments, fintech, or financial infrastructure Care intensely about correctness, auditability, and reliability Have owned payments or fintech infrastructure at a high‑growth startup Understand the unique challenges of financial systems: idempotency, reconciliation, compliance Love hard infrastructure problems with direct business impact What You Need 5+ years of software engineering experience 2+ years working on payments, fintech, or core financial infrastructure Experience building highly reliable, fault‑tolerant distributed systems Strong expertise in strongly typed languages Deep understanding of financial systems and their unique constraints 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: We offer 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 Joinwarp