Staff Software Engineer, Gusto Pro

Responsibilities

• Own and extend existing third-party integrations and build new integrations as the portfolio expands.
• Design and build backend services using Ruby on Rails and Sidekiq to synchronize data between Gusto and partner platforms.
• Evaluate and implement integration patterns, including AI agent protocols such as MCP.
• Define technical approaches and contribute to the Integrations roadmap.
• Partner with Product, Design, and Data Science to validate workflows and incorporate feedback.
• Participate in code review and help establish engineering practices and technical standards.
• Mentor other engineers as the team grows.

Requirements

• 8+ years of professional software development experience.
• Experience owning multi-quarter projects end to end, including scoping, planning, execution, stakeholder management, and launch.
• Strong platform or application engineering background involving services, APIs, third-party integrations, data flows, and observability.
• Ability to work effectively in an ambiguous, early-stage domain with an evolving roadmap.
• Strongly preferred experience with Ruby on Rails.
• OAuth and third-party API integration experience are a plus.
• Familiarity with AI agent protocols such as MCP or agentic integration patterns is a plus.
• Strong communication skills for explaining technical tradeoffs to engineers and cross-functional partners.
• An AI-native engineering workflow using AI tools for code generation, review, debugging, and documentation.

Benefits

• Competitive base pay, benefits, and stock equity including RSUs.
• Employees based in Denver, San Francisco, or New York are expected to work from the office approximately 2–3 days per week or more depending on the role.
• Remote or non-office work requires a secure, reliable, and consistent internet connection.
• The role includes regular and predictable attendance expectations, whether in-office, hybrid, or fully remote.