# Senior Software Engineer, Agent Platform

**Company:** [Ai2](https://hotfix.jobs/companies/ai2)
**Location:** Seattle, WA
**Role:** Fullstack Engineering
**Salary:** $147k – $220k/yr
**Experience:** 8+ years
**Skills:** API Design, Web Services, Distributed Systems, Data Pipelines, Cloud Tooling, SDKs, Cli Tooling, Observability, Evaluation Tooling, Identity And Authorization, Runtime Orchestration, Event Routing, LLMs, Agent Architectures, Documentation
**Posted:** 2026-08-07

> Build and operate the APIs, services, observability, evaluation tooling, SDKs, and CLI that enable external organizations to develop reliable AI agents. The role requires 8+ years of software engineering experience spanning distributed systems, cloud tooling, production ownership, and modern AI workflows.

## Job Description

## Responsibilities
- Design and evolve platform APIs for agent registration, authentication, secrets, deployment, runtime, events, discovery, and evaluation.
- Build observability features including logs, conversation history, execution traces, metrics, and failure reporting.
- Make evaluation a first-class platform capability by supporting eval definition and execution, version comparison, quality tracking, and regression detection.
- Build and operate services for identity and authorization, runtime orchestration, deployment, event routing, and agent registration.
- Build and operate production agents, including prompt and tool design, quality and cost tuning, and ongoing reliability.
- Identify recurring customer-work patterns and turn them into platform features.
- Own developer experience across onboarding, quickstarts, SDKs, CLI tooling, example agents, API documentation, and local development.
- Collaborate with front-end engineering, product management, customers, and research and partnerships teams.

## Requirements
- 8+ years of professional software engineering experience.
- Experience across web services, distributed systems, data pipelines, and cloud tooling.
- Track record of shipping products to external users and owning them in production.
- Strong opinions about API design and a preference for simple designs.
- Willingness to write documentation as part of the development process.
- Fluency with modern AI tools in your workflow.
- Ability to adapt quickly to evolving LLMs and agent architectures.
- Clear technical communication with engineers and non-engineers.

## Nice to Have
- Experience building developer platforms, SDKs, or related tooling.

## Compensation
- Base salary range: $146,880–$220,320.
- Generous bonus plans are included in the compensation package.

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