Software Engineer

About the role About Us Lumari streamlines operations for supply chain teams with AI agents that monitor, coordinate, and take action. Lumari (YC X25) is the first AI supply chain platform for direct materials procurement. We deploy always-on digital workers that handle RFQs, supplier communication, order tracking, and end-to-end procurement execution -- replacing the spreadsheets, emails, and manual follow-ups that bog down procurement teams. We work with manufacturers, hardware companies, and any business managing complex direct materials spend across multiple suppliers. We're building the OS for supply chain operations. Learn more at lumari.ai Supply chain is how the modern world actually works. Every physical product you use, from cars and phones to chairs and machines, depends on a vast coordination network to source materials, manage production, and deliver on time. When supply chain breaks, everything stops. A single delayed component can halt an entire factory. A missed delivery can kill a product launch. We enable these teams to stay ahead of these issues before they turn into major operational crises. If you want to build a product that drives real-world impact at enterprise scale, join us. You'll ship fast, work directly with customers, and help make agents reliable in real operations. What You’ll Do Build AI agents from the ground up: designing orchestration logic, tool calling, prompting, and decision-making flows that work reliably in production environments Ship full-stack features end-to-end, from backend services and data models to frontend interfaces Design clean, intuitive UI/UX for complex workflows Own features from idea to production: build, launch, monitor, and improve Iterate quickly based on customer feedback, and turn ambiguous problems into shipped product Work closely with co-founders (ex-Google, ex-Stripe) to set engineering and product direction What We’re Looking For Strong full-stack experience shipping production software with React, TypeScript, Python, FastAPI, Next.js Experience building with AI and LLMs: tool calling, prompting, structured outputs, guardrails, and agent workflow design Solid system architecture thinking: you can design scalable, maintainable systems and make smart tradeoff decisions Power user of AI coding tools (Cursor, Claude Code, etc.) and ability to use them to move faster without sacrificing quality Design sense and attention to detail: you care about how interfaces look and feel, not just how they work Proactive ownership mindset: you fix problems as you see them and can independently turn requirements into production-ready code Bonus Points (optional) Prior startup experience, founding engineer role, or you've been a founder yourself Experience working in or alongside supply chain, logistics, procurement, or operations teams Built or worked with traditional ERP software (SAP, NetSuite, etc.) or supply chain management systems About Lumari Lumari is the world's first AI-powered procurement automation platform purpose-built for direct materials and supply chain execution. Backed by Y Combinator, Lumari is a well-funded startup that deploys 100s of always-on AI agents that run sourcing workflows, manage RFQs, expedite purchase orders, and coordinate supplier communication end-to-end -- compressing cycle times and giving teams full visibility into active orders, RFQs, and supplier performance. Founded by engineers from Google, Tesla, Amazon, and Stripe who have built and scaled supply chain systems serving millions of users. Built to operate directly on top of existing tools and ERP systems. Lumari handles all the manual work: quote follow-ups, PO confirmations, delivery status updates, risk escalation so procurement teams can focus on strategic work. Lumari helps companies from Fortune 500s to fast-growing startups automate work from sourcing to delivery and bring full visibility to their procurement operations. To learn more check out https://lumari.ai/