Senior Software Engineer - AI Agent Infrastructure & Scale (Equity)

Sim; San Francisco (CA); On-site; USD 210,000 - 260,000; Full time

Benefits offered by this job

Equity

Onsite in SF

Job summary

Sim is seeking a mission‑driven engineer to build the agent that scales knowledge work. You’ll design and implement the infrastructure that enables large language model tool calls, memory, retries, and robust failure handling for 100,000+ builders.

The role includes an onsite in our San Francisco office, a small project to demonstrate ideas, and a chance to meet the team. Compensation ranges from $210k to $260k base plus equity, with an equity stake aligning with impact.

Qualifications

• Able to design and maintain AI infrastructure for reliable tool calls.
• Demonstrates ability to reason about LLM behavior and system reliability.
• Shows focus on scalable, fault-tolerant engineering for knowledge work apps.

Responsibilities

• Build infrastructure for the agent that plans, calls tools, uses memory, and recovers from failure at scale.
• Collaborate with team during onsite project to discuss ideas and demonstrate impact.
• Translate intuition about LLM behavior into robust, maintainable systems.

Skills

LLM behavior

Tool calls

Context handling

Robust infra

Job description

Sim is seeking a mission‑driven engineer to build the agent that scales knowledge work. You’ll design and implement the infrastructure that enables large language model tool calls, memory, retries, and robust failure handling for 100,000+ builders.

The role includes an onsite in our San Francisco office, a small project to demonstrate ideas, and a chance to meet the team. Compensation ranges from $210k to $260k base plus equity, with an equity stake aligning with impact.