Staff Software Engineer Gustie Assist
Gusto is a payroll and HR platform that helps small businesses pay domestic and international employees, manage benefits, and automate compliance.
Maintainer signals as of 8/14/2026
Projects
About Gusto
Gusto serves small and mid-sized businesses with payroll processing, employee benefits administration, and HR tools in one platform. Users can run payroll, manage health insurance, hire globally, and pay international contractors in local currency or USDC stablecoins. The platform automates payroll tax filings across multiple states and integrates with tools like QuickBooks and Xero.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You build across the Otto AI agent platform, including its runtime, agent graph, tool layer, Rails and GraphQL backend, advocate-facing experience, and evaluation systems. You expand safe autonomous actions, develop observability, work with LLMs, improve retrieval and prompting, partner across functions, and mentor engineers.
Requirements
- Typically 8+ years of software engineering experience
- Experience shipping LLM-powered or agentic systems in production
- Experience with tool-calling, agents, retrieval, or evaluations
- Full-stack software engineering experience
- Experience owning multi-quarter projects
- Judgment regarding safety and blast radius
- Mentoring experience
- Experience with agent frameworks, evaluations, retrieval, or MCP-style architectures
- Ruby on Rails or JavaScript/React experience
- GraphQL familiarity
Responsibilities
- Design and build the Otto platform
- Develop the runtime, agent graph, and tool layer
- Build Rails and GraphQL backend services
- Build the advocate-facing experience
- Expand safe autonomous tool-using actions
- Implement identity and permissions models
- Build evaluation and observability systems
- Work with LLM prompting, tools, retrieval, and feedback loops
- Partner with Product, Data, Design, and CX teams
- Mentor engineers
Benefits
- Benefits
- Equity (RSUs)