Senior Software Engineer - AI Agents

Sourced from career.io

A fast-growing AI startup in San Francisco is hiring a Senior Software Engineer to build core infrastructure for autonomous AI agents that automate complex engineering workflows across enterprise desktop applications. You'll work directly with the CTO on tool-calling, state and context management, model routing, and error recovery, while optimizing latency, reliability, and cost. The role is fully onsite five days per week and offers visa sponsorship including H-1B transfers.

• Design and build core AI agent infrastructure including tool-calling, state management, context management, model routing, and error recovery
• Develop production-quality software that integrates with sophisticated desktop engineering applications in enterprise environments
• Optimize system performance, latency, reliability, and cost efficiency including token usage and workflow execution
• Build evaluation frameworks and reproducible benchmarks to measure agent performance and task completion
• Collaborate with AI engineers, researchers, and domain experts to translate customer needs into scalable solutions
• Troubleshoot concurrency, application integration, and failure-handling challenges
• Contribute to technical architecture, code reviews, and engineering best practices

• 3–10 years of professional software engineering experience building and maintaining production systems
• Exceptional software engineering fundamentals including system design, debugging, data structures, and algorithms
• Strong proficiency in Python and at least one additional programming language
• Experience developing reliable, scalable software and solving complex technical problems
• Ability and willingness to work onsite in San Francisco five days per week
• Strong interest in AI agents, automation, and emerging AI technologies

• 5+ years of professional software engineering experience
• Experience in high-growth startups or fast-paced engineering environments
• Familiarity with enterprise software deployment, security restrictions, or corporate workstation applications
• Experience with desktop automation, COM, or programmatically controlling applications
• Experience developing AI agents, agentic workflows, or LLM-powered applications
• Computer science degree from a highly regarded university