Senior/Staff Software Engineer: Agents

Position Overview We are seeking a highly experienced Senior/Staff Software Engineer to help design and build next-generation AI-powered agent platforms for customer-facing applications. This role is ideal for engineers who thrive in fast-paced startup environments, enjoy solving complex technical challenges, and have hands-on experience shipping production-grade LLM or agentic AI systems. The ideal candidate brings strong full-stack engineering capabilities with a backend-first mindset, deep familiarity with AI tooling and infrastructure, and the ability to lead high-impact cross-functional initiatives from concept through production. This is a fully remote opportunity open to candidates located in the United States or Canada. Key Responsibilities Own and deliver AI agent experiences end-to-end, including backend orchestration, LLM integrations, conversational interfaces, tool execution, and evaluation systems Design scalable architectures for agentic AI systems and contribute to platform-level AI infrastructure Build and improve shared systems such as: Tool abstractions Retrieval pipelines / RAG systems Conversation persistence Evaluation frameworks Permissioning and observability Collaborate closely with Product, Design, and Engineering leadership to define technical direction and product strategy Make thoughtful engineering tradeoffs balancing latency, reliability, scalability, and cost efficiency Improve AI system quality through experimentation, evaluation frameworks, and continuous iteration Lead or contribute to large-scale technical initiatives across multiple teams Mentor engineers and promote engineering best practices across the organization Required Qualifications 5+ years of professional software engineering experience Proven experience building and shipping production-grade AI/LLM-powered applications or agentic systems Strong expertise in backend development using Node.js and TypeScript Experience designing scalable distributed systems, microservices, and backend infrastructure Hands-on experience with: Tool calling Prompt engineering Agent loops AI orchestration frameworks Familiarity with evaluation and observability tooling for non-deterministic AI systems such as: LangSmith Braintrust Custom evaluation frameworks Full-stack engineering experience with modern frontend frameworks such as React and TypeScript Strong understanding of databases such as PostgreSQL and MongoDB Excellent communication and collaboration skills with cross-functional teams Demonstrated ownership mentality and ability to operate independently in ambiguous environments Preferred Qualifications Experience with Retrieval-Augmented Generation (RAG) systems at production scale Prior experience building customer-facing AI products Background working at high-growth or venture-backed startups Contributions to open-source AI tooling, agent frameworks, or developer productivity systems Experience mentoring engineers or leading technical initiatives Familiarity with AI observability and evaluation workflows Experience with cloud infrastructure and modern deployment practices Compensation & Benefits Competitive base salary ($210K – $230K DOE) Competitive equity package Fully remote work environment Opportunity to work on cutting-edge AI products with significant technical ownership High-impact role within a rapidly growing engineering organization