Software Engineer, Sandbox & Agent Executor

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Software Engineer, Sandbox & Agent Executor in USA

Retool
Full time
Email

USA
09/20/2026
Report

San Francisco, CA

Responsibilities

Own agent behavior across product surfaces, including quality, safety, variance, failure modes, and tool and harness design.
Design and evolve prompting, context construction, retrieval, routing, and tool-use strategies for long-horizon workflows.
Build evaluation systems using statistical signals, distributions, and trends to measure agent behavior and prevent regressions.
Detect, diagnose, and resolve nondeterministic failures such as hallucinations, partial correctness, instruction drift, and context sensitivity.
Partner with product and infrastructure teams to provision, isolate, and safely roll out agent workloads in cloud and self-hosted environments.
Build and deploy agentic products across the stack using TypeScript, Node.js, and React.
Mentor engineers and establish standards for reliable AI behavior and quality.

Requirements

6+ years of professional engineering experience with ownership of complex production systems.
Production experience with agentic systems, including context engineering, tool use, and evaluation frameworks at real user scale.
Hands-on experience with sandboxing technology and running agents inside sandboxed environments.
Experience with Kubernetes or an equivalent platform in practice, including EKS, ECS, or similar, and end-to-end service ownership.
Strong systems thinking and sound engineering judgment when using AI.
Experience investigating model behavior and mentoring engineers on agent-focused work.

Retool

Retool builds a developer platform for quickly creating internal apps, workflows, and automations by combining visual components with code and connecting to existing databases and APIs. It sells cloud and self‑hosted enterprise subscriptions with governance, security, and permissions features for...

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