Sr. Applied AI Engineers (multiple openings)

Senior / Staff AI Engineer (Agent Systems)Summary:Multiple early-stage portfolio companies (Seed/Series A) are hiring engineers to build the next generation of AI-native systems across enterprise software, security, healthcare, developer tools, and vertical SaaS.These companies are building systems that go beyond copilots — software that reasons, takes action, and executes real-world workflows end-to-end. While each company operates in a different domain, they share a common set of technical challenges: goal-driven execution, multi-step reasoning, system reliability, and increasingly, coordination across multiple agents and tools.This is not a single role at one company. Applicants will be considered for multiple openings across Greylock-backed companies, and we will work directly with you to match you with the most relevant teams based on your experience and interests.What You’ll Do:Design and build agent systems that execute multi-step workflows across real-world environmentsDevelop goal-driven systems that plan, act, and adapt in the face of ambiguityContribute to or lead the design of multi-agent architectures, where systems coordinate to complete complex tasksBuild orchestration layers that manage tool use, decision-making, and long-running workflowsDefine and implement reliability mechanisms including evaluation, guardrails, recovery, and human-in-the-loop systemsDrive system performance across latency, cost, and quality in productionPartner with founders, product, and engineering teams to translate open-ended problems into working systemsHelp set technical direction and establish best practices as teams scaleWhere You’ll Work in the Stack:Planning & Reasoning: goal decomposition, decision-making, long-horizon executionOrchestration: workflow management, tool routing, multi-component systemsExecution: integrations with APIs, services, and real-world systemsState & Memory: persistent context, user/system state, temporal reasoningEvaluation & Control: feedback loops, safety systems, observabilityInfrastructure: deployment, scaling, monitoring, and performance optimizationWhat We’re Looking For:Experience building and shipping production LLM or agent-based systems that take actions, not just generate outputsStrong understanding of goal-driven execution and multi-step workflowsExperience with orchestration, tool use, or multi-component systems (e.g., ReAct, LangGraph, or similar approaches)Track record of owning systems end-to-end, including reliability and iteration in productionComfort working across the stack, from model behavior to system integrationStrong engineering fundamentals (Python or similar; experience building production systems required)Ability to operate in ambiguous environments and make high-leverage technical decisionsSignals We’re Especially Excited About:You’ve built systems that complete workflows end-to-end, not just assist usersYou’ve worked on agents that operate over time (stateful, proactive, or long-horizon systems)You’ve designed or contributed to multi-agent or multi-component systemsYou’ve owned failure modes, reliability, and recovery in production systemsYou’ve integrated AI systems with external tools, APIs, or enterprise environmentsYou’ve built from first principles in early-stage settingsAbout GreylockGreylock is a leading early-stage venture capital firm that partners with exceptional founders building category-defining companies. Our portfolio includes Figma, Anthropic, Ramp, Abnormal Security, Rubrik, Airbnb, LinkedIn, Roblox, Dropbox, and Coinbase.About the Greylock Recruiting TeamAs full-time employees of Greylock, our team works across the portfolio to connect candidates with open roles at our portfolio companies. If there is a strong fit, we will introduce you directly to hiring teams for full-time opportunities at those companies.