Staff Backend Engineer, Financial Infrastructure

Gusto; Denver (CO); Hybrid; USD 163,000 - 204,000; Full time

Benefits offered by this job

Equity (RSUs)

Job summary

Gusto is hiring a senior software engineer to own backend services and APIs for retirement systems, shipping production code and handling real financial edge cases. You will partner with product, compliance, and operations to translate complex requirements into reliable software.

The role emphasizes building core money and asset flow systems with a senior, cross-functional team, offering equity and a hybrid work model across Denver and other remote locations.

Qualifications

• 8+ years of software engineering experience building and shipping production products or platforms.
• Strong experience with services, APIs, and data-heavy workflows.
• Experience in financial systems or payments or high-correctness domains.
• Owns systems end-to-end, including production support and operational work.
• Experience collaborating with PMs and cross-functional partners to deliver scoped work.
• Pragmatic, execution-focused engineering approach.
• Excellent communication and collaborative teamwork.
• Ability to mentor engineers to maximize 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 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 tooling.
• Collaborate with other teams to integrate with shared systems and platforms.
• Mentor engineers to solve complex problems at scale.
• Write clear, reliable, well-tested code that ships quickly and scales.

Skills

API design

Payments systems

Mentoring engineers

Cross-functional

High correctness mindset

Tools

Ruby on Rails

Backend frameworks

Job description

Gusto is hiring a senior software engineer to own backend services and APIs for retirement systems, shipping production code and handling real financial edge cases. You will partner with product, compliance, and operations to translate complex requirements into reliable software.

The role emphasizes building core money and asset flow systems with a senior, cross-functional team, offering equity and a hybrid work model across Denver and other remote locations.