Staff Software Engineer, Retirement

San Francisco, CA - Hybrid🌐 Remote💼 Full-time💰 $163,000–$163,000🗓 2026-08-26 → 2026-09-26

Core

Building and owning full-stack services and APIs that enable tens of thousands of small businesses to offer and manage 401(k) retirement plans for their employees.

Role type

Staff Software Engineer (Full Stack)

Builds

Production services and APIs for 401(k) management

Domain

Fintech / Retirement Planning

Deliverable

production ML models | product features | infrastructure

Required skills

Full-stack development, API design, message-based systems, GraphQL, React, Ruby on Rails, system architecture, production support

Preferred skills

None explicitly stated

Technologies

Sidekiq, SQS, NServiceBus, GraphQL, React, Ruby on Rails

Responsibilities

Design, build, maintain, and ship services and features for 401(k) management; Identify opportunities to extend and modify system architecture; Debug production issues and improve reliability and observability; Collaborate with cross-functional teams to deliver production-ready solutions

Seniority

Staff, hands-on IC with strategic influence

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About gusto

At Gusto, we're on a mission to grow the small business economy. We handle the hard stuff — payroll, health insurance, 401(k)s, and HR — so owners can focus on their craft and their customers. With teams in Denver, San Francisco, and New York, we support more than 500,000 small businesses nationwide and are building a workplace that reflects the people we serve.