Staff Software Engineer, Financial Platform & Payments

Gusto, Inc.; United States; Hybrid; USD 163,000 - 247,000; Full time

Job summary

Gusto, Inc. is seeking a Staff Software Engineer for the Financial Platform to own backend services and APIs moving money and assets.

You will work with product, compliance, and operations to translate complex financial requirements into reliable software, shipping code end-to-end and solving real edge cases at scale. You will mentor engineers, design robust workflows for payroll, 401(k), and invoicing, and collaborate with cross-functional teams to deliver production-ready solutions.

Qualifications

• 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 the 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 a comparable backend framework).

Responsibilities

• 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 like payroll integration, KYB/KYC, 401k loans, billing and invoicing, and IRA
• Partner with product, compliance, and operations 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 to help solve some of the hardest technical problems out there in very complex domains and at a large scale
• Write clear, reliable, well-tested code that ships quickly and scales well
• Build a product that our customers genuinely love

Skills

APIs

Data-heavy workflows

Ruby on Rails

Financial systems

End-to-end ownership

Payments

Production support

Mentoring engineers

Job description

Gusto, Inc. is seeking a Staff Software Engineer for the Financial Platform to own backend services and APIs moving money and assets.

You will work with product, compliance, and operations to translate complex financial requirements into reliable software, shipping code end-to-end and solving real edge cases at scale. You will mentor engineers, design robust workflows for payroll, 401(k), and invoicing, and collaborate with cross-functional teams to deliver production-ready solutions.