Senior AI Engineer

Lexsy is a legal operating system for startups, integrating AI to streamline legal workflows and reduce friction in legal processes. They are seeking a Senior AI Engineer to enhance their AI infrastructure, focusing on building production systems that support real clients and legal workflows.

Responsibilities:

• Design and build the repeatable agent framework that powers Lexsy's COO, Lawyer, CTO, and Growth agents
• Multi-model architecture (Claude, GPT, Gemini) with intelligent fallback, context management, and cost optimization
• Build and maintain integrations with 30+ external services (Gmail, Slack, Notion, Calendar, financial APIs, legal tools) via MCP and direct APIs
• Human-in-the-loop approval gates, data isolation, audit logging, and compliance enforcement at the framework level
• Monitoring, alerting, reliability engineering for AI systems that serve paying clients 24/7
• AI-powered client-facing features—cap table management, virtual data rooms, Word document generation and redlining, workflow automation, intelligent routing, and investor reporting tools