Senior AI Platform Engineer

NegotiateAI Inc.; United States; On-site; USD 120,000 - 160,000; Full time

Job summary

NegotiateAI Inc. is seeking a Senior Software Engineer to join their team focused on building an AI-driven procurement platform. The role involves backend development, implementing AI workflows, and contributing to the frontend. Ideal candidates have 6+ years of software engineering experience, proficiency in Node.js and React, and a mindset geared toward ownership. The environment is dynamic and startup-like, requiring a blend of technical expertise and product sensibility.

Qualifications

• 6+ years of professional software engineering experience.
• Experience shipping products in fast-moving startup environments.
• Hands-on experience with Node.js and React.

Responsibilities

• Build backend services for AI-driven procurement platform.
• Implement LLM- and RAG-based pipelines.
• Contribute to the Buyer Portal frontend.
• Write clear, maintainable code.

Skills

Backend experience

APIs and data pipelines

Node.js

React

AI-powered systems

AI-assisted development tools

Job description

Senior Software Engineer – AI Platform (Menlo Ventures–backed)

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.

About the Role

This is a hands‑on senior execution role working alongside 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; can code and iterate quickly and scrappily, but 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

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