Founding Software Engineer

About The RoleA well-funded, seed-stage B2B SaaS startup in the supply chain integrations space is looking for a Founding Software Engineer to help shape the architecture, culture, and product direction of an agentic integrations platform. This is a high-ownership role where you'll work across the full stack and have a direct impact on the company's trajectory from day one.What You'll DoBuild and evolve the integrations platform — including mapping, testing, retries, queues, observability, and the full infrastructure layer.Work across the entire stack: frontend (TypeScript, React), backend (Node.js), infrastructure (AWS), and LLM/agentic workflows.Own projects end-to-end, from initial specs through implementation to measurable customer impact.Help define product direction, engineering culture, and company-building decisions as an early team member.What We're Looking ForRequired3+ years of software engineering experience, ideally in fast-paced startup environments.Demonstrated experience building products 0→1, either at an early-stage startup or through serious side projects.Strong proficiency in TypeScript and React for frontend, and Node.js for backend.Experience integrating or building workflows around large language models (LLMs) and agent-based platforms.Hands-on experience with AWS for cloud infrastructure and PostgreSQL for data storage.Experience owning end-to-end feature development across frontend, backend, and infrastructure.Familiarity with observability, monitoring, distributed tracing, and reliable retry/queuing patterns in distributed systems.Strong computer science fundamentals.Nice To HaveExperience in supply chain, logistics, or enterprise integration domains (EDI, ERP, WMS, TMS, etc.).Familiarity with Vercel and Tailwind CSS.Compensation & BenefitsSalary: $130,000 – $200,000 USD annuallyVisa sponsorship availableEarly-stage equity opportunity as a founding team memberLocationThis is an on-site role based in San Francisco, CA. Candidates must be willing to work from the San Francisco office.