Staff Software Engineer – PEO Benefits

Gusto

. Design, build, and test the Gusto PEO Benefits experience, including benefits shopping and plan-recommendation flows, carrier integrations, MCP tools, and agents that automate operational and customer support processes .

Posted 9/19/2026full-timeUnited StatesLead💰 $163,000 - $247,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in software development, particularly in Ruby on Rails and JavaScript/React, with a strong focus on building and iterating PEO benefits solutions. Proven ability to mentor engineers, drive cross-functional projects, and leverage AI tools to enhance product capabilities.

Highest-signal resume keywords

8+ Years Of Software Development Experience3+ Years Of PEO ExperienceExperience Owning Multi-Quarter ProjectsExperience Leveraging AI ToolsAbility To Mentor Engineers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Ruby On RailsJavaScriptReactBackend API DevelopmentTest-Driven DevelopmentComplex Problem SolvingProduct Improvement PrototypingCode DocumentationCustomer Impact MeasurementCross-Functional Project Management

Soft Skills

Effective CommunicationCollaborationCuriosityMentoring

Tools & Technologies

AI ToolsMCP Tools

Industry Keywords

PEOBenefits ExperienceOperational Support ProcessesCustomer Support AutomationHigh-Growth Environment

Tech Stack

Tools & technologies

JavaScriptReactRubyRuby on Rails

About the role

Key responsibilities & impact

Design, build, and test the Gusto PEO Benefits experience, including benefits shopping and plan-recommendation flows, carrier integrations, MCP tools, and agents that automate operational and customer support processes
Mentor engineers solving complex technical problems in complex domains and at large scale
Help scale Gusto's Ruby/Rails and JavaScript/React applications
Collaborate with Product Management, Data, Design, and Platform Engineering teams to understand customer pain points and develop solutions
Prototype, iterate, and launch product improvements daily
Shape features from early specification and design through launch and long-term iteration
Write frontend code and design and build reliable backend APIs
Influence product direction and own post-launch outcomes
Build products customers value

Requirements

What you’ll need

Successful applicants typically have 8+ years of software development experience
3+ years of experience with PEO, with direct experience building PEO flows in a high-growth environment (preferred)
Experience owning multi-quarter projects that solve complex engineering problems and make measurable customer impact at scale
Experience driving large, cross-functional projects end-to-end through ambiguity
Experience leveraging AI tools or systems to accelerate development, improve testing, and deliver new product capabilities
Curiosity and experimentation with emerging AI frameworks
Ability to mentor engineers
Experience in, or interest working in, Ruby on Rails
Appreciation for a collaborative, test-driven environment
Ability to build well-structured, maintainable, well-documented code
Ability to effectively communicate across engineering teams and with business stakeholders
Ability to work from designated office locations approximately 2–3 days per week when based in Denver, San Francisco, or New York
Travel to Gusto's office for onboarding is required