Senior Staff Software Engineer, Gusto Agent – Partner Experiences, API

Gusto

. Identify and solve high-impact problems involving technical and organizational complexity across multiple domains .

Posted 10/15/2026full-timeUnited StatesSenior💰 $251,000 - $278,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive expertise in Ruby and Rails, with a strong focus on designing and building platforms and public-facing APIs. Proven ability to mentor teams, drive technical ownership, and align engineering initiatives with business goals.

Highest-signal resume keywords

Ruby ExpertiseRails FrameworkAPI DesignTechnical MentoringReliability Best Practices

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentAPI ContractsPerformance OptimizationTroubleshootingProduction Issue Resolution

Soft Skills

Technical CommunicationTeam Orientation

Tools & Technologies

AI Tools

Industry Keywords

Engineering InitiativesOrganizational ComplexityObservabilityScalable Engineering

Tech Stack

Tools & technologies

RubyRuby on Rails

About the role

Key responsibilities & impact

Identify and solve high-impact problems involving technical and organizational complexity across multiple domains
Design API contracts and agent-facing tools for partners and AI agents
Engage directly with developer-customers and internal agent partners
Ship clean, tested, and performant code
Provide technical guidance and mentoring across the organization
Inform and maintain reliability and observability best practices
Troubleshoot and resolve production issues

Requirements

What you’ll need

12+ years of professional software development experience
Technical ownership of organization-wide engineering initiatives
Experience scaling engineering organizations
Expertise in Ruby and Rails
Experience navigating massive Rails applications and multiple Ruby codebases
Experience designing and building platforms and public-facing APIs
Strong understanding of reliability and performance at scale
Experience mentoring and raising the technical bar across an organization
Ability to orient teams around business-aligned technical goals
Ability to communicate technical constraints and needs to business leaders
AI tools relevant to the role and growing AI fluency

Benefits

Comp & perks

Competitive base pay
Health insurance
401(k)
Equity (RSUs)
Hybrid work arrangement
Secure, reliable, and consistent internet connection support for approved non-office locations
Reasonable accommodations for qualified individuals with disabilities and disabled veterans