Arcadia
Sr. Software Engineer (AI Agents)
Skills
2 months ago
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Important information
Contract type:
Permanent
Location:
San Francisco, CA, USA
Work mode:
Onsite
Published on:
7 September 2026
What they need
About the Role
A fast-moving Series A AI company is hiring a Senior Software Engineer (AI Agents) to build the core systems behind an intelligent automation platform used in highly complex, operations-heavy industries. You’ll design and ship production-grade LLM systems, contribute across the stack, and play a key role in evolving both the product and technical architecture.
This is a high-ownership, high-impact role where you’ll collaborate closely with the founding team, contribute to major architectural decisions, and build technology that solves real-world operational problems at scale.
What You’ll Do
Build and scale the core automation and AI agent systems that power the platform
Work across the stack: backend APIs, data pipelines, orchestration layers, and frontend workflows
Design and deploy agent-based LLM components for reasoning, extraction, and decision-making
Collaborate directly with users to understand workflows and ship high-impact solutions
Contribute to architecture discussions and help drive key technical decisions
Write clean, reliable, maintainable code with strong engineering fundamentals
Support roadmap execution and help elevate engineering standards as the team grows
Who You Are
A senior-level engineer with experience in high-growth or startup environments
Comfortable owning projects end-to-end with minimal oversight
Strong in 0→1 product development and able to operate in ambiguous problem spaces
Genuinely interested in applied AI and complex operational workflows
Pragmatic, execution-focused, and thoughtful about long-term system design
What We’re Looking For
6+ years of professional software engineering experience
Strong full-stack capabilities (React, TypeScript, Go, Node.js, or Python)
Experience designing and shipping production backend systems and APIs
Hands-on experience building or integrating LLM-powered or agent-based systems
Ability to design scalable services and data pipelines
Strong technical judgment and ability to make sound tradeoffs
Clear communicator who can collaborate cross-functionally and with customers
Bonus Points
Experience with retrieval pipelines, orchestration frameworks, or structured data extraction
Background in logistics, operations, or other data-intensive domains
Prior experience at an early-stage startup
Why You’ll Love This Role
Meaningful equity and ownership at a high-growth startup
Opportunity to help shape the core architecture of a category-defining AI platform
Direct collaboration with founders on product and technical strategy
High-trust environment with real autonomy
The chance to modernize a critical global industry with automation and intelligent systems
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