Navan

Sr. Software Engineer, Core AI

Navan
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3 days ago

Responsibilities

  • Design and implement task-specific AI services and agents, including data serialization, retrieval, memory, tool integrations, and bounded multi-step reasoning.
  • Define expected AI behavior and build and maintain representative evaluation sets and tests.
  • Use evaluation results, failure analysis, and production feedback to improve context, data, service logic, tools, and model behavior.
  • Integrate tracing, observability, versioning, monitoring, reliability practices, and success metrics into owned services.
  • Run repeatable experiments comparing models, data, and implementation approaches.
  • Partner with AI Architecture, AI Ops, and Platform teams to deliver secure, reliable, cost-aware, scalable services.
  • Move solutions from user problem to prototype to production and learn from workflow outcomes.

Requirements

  • 5+ years of software engineering experience delivering production services or products.
  • Hands-on experience building AI/LLM-powered applications or agents used by real users or operational teams.
  • Experience defining expected AI outcomes, building evaluation sets, tracking regressions, and acting on evaluation results.
  • Ability to shape retrieval, context, and serialization so models receive the information required for a task.
  • Sound judgment regarding tool use, autonomy, human review, failure handling, privacy, reliability, latency, and cost.
  • Product-minded approach focused on solving workflow problems and measuring outcomes.
  • Experience with agent runtimes, model APIs, MCP, tracing, or evaluation tools is helpful but not required.
Navan

About Navan

1,001-5,000 employees

Navan builds an AI-powered travel and expense management platform for businesses, combining online booking, spend controls, automated expense reporting, and corporate cards with 24/7 support. The company sells its T&E software and payments tools to enterprises and high-growth firms, generating revenue from subscriptions, travel transactions, and card interchange. Founded in 2015 and headquartered in Palo Alto, it rebranded from TripActions and serves customers globally.

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