Actively AI
Senior / Staff Software Engineer (AI Agents)
$180K–$220K
San Francisco, California, United States +1 · Staff · Full-time · Posted Nov 23, 2025
- Location
- San Francisco, California, United States
New York, New York, United States
About the job
Architects and builds scalable backend infrastructure and AI agents that reason over customer and external data, recommend actions, and execute workflows reliably with human collaboration.
What you'll do
- Design and build agents and event-driven backend systems for complex, long-running workflows.
- Develop orchestration primitives for agent and human collaboration, with reliable state transitions and data contracts.
- Improve agent reliability and maintainability through fault tolerance, observability, testing, and better abstractions.
What they ask for
- Deep Python expertise.
- Strong fundamentals in concurrency, transactions, and performance tuning.
- Experience designing and operating large-scale, event-driven backend systems and modeling complex workflows.
- Familiarity with streaming and workflow technologies and relational, in-memory, and vector data stores.
Nice to have
- Built or contributed to LLM-powered or agent-driven systems.
- Experience scaling mission-critical systems with high reliability requirements.
Pay
USD $180,000 - $220,000 base salary
Tools
Python, Kafka, Pub/Sub, Temporal
AI focus
Builds production-grade GTM AI agents, integrating LLMs and supporting agent reasoning, workflow orchestration, retrieval, and human-in-the-loop actions.
Model-written summary · the original posting is authoritative