Senior AI Platform Engineer

SENIOR SOFTWARE ENGINEER – AI PLATFORM NegotiateAI (Menlo Ventures–backed) ABOUT NEGOTIATEAI NegotiateAI is building an enterprise AI platform to modernize procurement for manufacturing and industrial companies. Procurement today is fragmented, manual, and opaque. We’re changing that by giving teams clean data, real-time visibility, and AI-driven workflows that actually get used. We focus on indirect spend - MRO, services, and long-tail categories - where inefficiency quietly costs enterprises millions every year. Our platform combines agentic AI, LLMs, and Retrieval-Augmented Generation (RAG) to turn messy procurement data into actionable decisions and measurable savings. Backed by Menlo Ventures and founded by a former Apple supply-chain leader, we’re building real systems used by real enterprises. ABOUT THE ROLE This is a hands-on senior execution role working alongside with the founding engineers. You’ll help build and scale the core platform across backend services, AI workflows, and the Buyer Portal frontend. You’ll be expected to move fast using modern AI-assisted development tools (e.g., Cursor, Copilot-style workflows) to iterate quickly, refactor aggressively, and ship production-quality code. This is not a research role - it’s about building systems that work. WHAT YOU’LL DO - Build and extend backend services that power NegotiateAI’s AI-driven procurement platform - Implement LLM- and RAG-based pipelines for spend categorization, benchmarking, and supplier analysis - Develop and maintain agentic workflows that automate analysis, recommendations, and follow-ups - Contribute to the Buyer Portal frontend (React), building clean, usable interfaces for procurement teams - Use AI-assisted coding tools (e.g., Cursor) to accelerate development, debugging, and iteration - Integrate with customer data sources (ERPs, invoices, supplier files) and handle messy, real-world datasets - Collaborate closely with the founding engineer on architecture, trade-offs, and execution - Write clear, maintainable code with strong attention to performance, reliability, and observability MUST HAVES - 6+ years of professional software engineering experience - Strong backend experience building APIs and data pipelines; comfort working across the stack - Experience shipping products in fast-moving startup or startup-like environments - Hands-on experience with Node.js and React - Practical experience building or integrating AI-powered systems (LLMs, RAG, embeddings, or agentic workflows) - Comfortable using AI-assisted development tools (Cursor, Copilot, or similar) to move faster without sacrificing quality - Strong product and design sense and ability to balance speed with correctness - Ownership mindset: you see problems through to completion - Full tech stack + ML + product sense must. Can code and iterate quickly and scrappily, but can also step back and architect the stack, experience with Node & React. - A+ player, exceptionally good technically, exceptional leader - Hungry to build a $B+ VC backed AI enterprise solution Additional nice to haves: - Some large company experience early in career - Experience with building consumer software and familiar with how to build consumer-grade software - Experience in scaling and working with enterprise clients