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Salary: USD 163,000 - 247,000 / annual
Gusto is seeking a Staff Software Engineer to join the Financial Infrastructure team, which owns core money and asset flow systems for Gusto Retirement. This is a hands-on role focused on building and owning backend services and APIs end-to-end, shipping production code, and working through real financial edge cases.
Day-to-day responsibilities include:
- Design, build, and ship services and APIs for money movement and financial integrations
- Work on payments, settlements, reconciliation, and corrections involving real customer funds
- Build and support critical workflows including payroll integration, KYB/KYC, 401k loans, billing and invoicing, and IRA systems
- Partner with product, compliance, and operations teams to scope work and deliver production-ready solutions
- Debug production issues and improve reliability, observability, and operational tooling
- Collaborate with other engineering teams to integrate with shared systems and platforms
- Mentor other engineers on solving complex technical problems at scale
- Write clear, reliable, well-tested code that ships quickly and scales well
The Financial Infrastructure team is senior-focused, works on complex cross-functional initiatives, and maintains tight ownership of systems end-to-end. You'll work closely with product and partner teams while being responsible for execution and reliability.
Gusto supports over 500,000 small businesses nationwide with payroll, health insurance, 401(k)s, and HR services. The company has offices in Denver, San Francisco, and New York, with hybrid work expectations of 2-3 days per week in office. All full-time employees receive competitive base pay, benefits, and equity (RSUs).
REQUIREMENTS:
- 8+ years of software engineering experience building and shipping production products or platforms
- Strong experience with services, APIs, and data-heavy workflows
- Experience working on financial systems, payments, or other high-correctness domains (or ability to ramp quickly)
- Comfortable owning systems end-to-end, including production support and operational work
- Experience working closely with PMs and cross-functional partners to deliver scoped work
- Pragmatic, execution-focused approach to engineering
- Clear communicator and collaborative teammate
- Ability to mentor engineers to maximize their performance and impact
- Experience with Ruby on Rails or comparable backend framework
BONUS:
- Experience leveraging AI tools or systems to accelerate development, improve testing, and deliver new product capabilities
- Curiosity and experimentation with emerging AI frameworks, applying and sharing best practices to evaluate and scale AI use safely
