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Gusto

Runs payroll and HR software for small businesses

Staff Software Engineer - Solo

Full-Stack EngineeringConfirmed live in the last 24 hours
Full-timeSan Francisco, CA, USA

About the Job

Requirements

  • At least 8 years of professional software engineering experience, including a track record of shipping full-stack features end to end.
  • Proficiency across a full-stack toolkit such as Ruby on Rails, React, TypeScript, and GraphQL, and the judgment to choose appropriate tools for the problem.
  • Demonstrated ownership of 0-to-1 or greenfield projects, rather than only extending existing systems.
  • Habitual use of AI tools in day-to-day engineering work.

Responsibilities

  • Own end-to-end delivery of new product areas, from technical design through shipping.
  • Use AI in the engineering workflow and help build AI-native product experiences, including MCP tools.
  • Partner with Product, Design, Data Science, and GTM to identify customer and business problems, prototype solutions, and iterate quickly.
  • Make pragmatic architecture and data-modeling decisions for problems without existing precedent at Gusto.
  • Build and maintain full-stack features, from backend APIs to frontend UI, with attention to scalability and maintainability as the team and product grow.
  • Contribute to product framing, design tradeoffs, or GTM considerations when useful to the team.
  • Help define engineering practices and technical foundations for a team in its early build-out.

Desired Qualifications

  • Experience building for self-employed businesses or small and medium-sized businesses.
  • Experience in a regulated or compliance-adjacent domain such as fintech, payroll, tax, or accounting.
  • Experience shipping AI-powered or AI-augmented product experiences, including agents, copilots, or large language model-based tooling.
  • Startup or team-of-one experience, with comfort operating autonomously and with few guardrails.

About the Company

Gusto

Runs payroll and HR software for small businesses

Gusto runs payroll, benefits administration, and HR software for small and midsize businesses that want to manage their teams in one place. Its payroll system calculates wages and taxes, files required forms, and connects employee hours with pay runs. Employers use the same platform to enroll workers in health insurance and retirement plans, manage time off, and organize hiring paperwork, while staff access paystubs through personal accounts. Businesses pay monthly subscription fees based on their plan and workforce size, with extra charges for selected services and faster payment options. Gusto was founded in 2011 and is headquartered in San Francisco, California.

Company size
1,001-5,000
Company stage
Series E
Total funding
$706.2M
Headquarters
San Francisco, CA
Founded
2011

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