With teams in Denver, San Francisco, and New York, we support more than 400,000 small businesses nationwide and are building a workplace that reflects the people we serve. All full-time employees receive competitive base pay, benefits, and equity (RSUs) , because everyone who helps build Gusto should share in its success. Offer amounts are determined by role, level, and location.

AI is a fundamental part of how work gets done at Gusto. We expect all team members to actively engage with AI tools relevant to their role and grow their fluency as the technology evolves. AI experience requirements vary by role and will be assessed during the interview process.

We're looking for seasoned full-stack software engineers to join the teams behind Gusto's payments and risk platforms to serve small business owners every day. As a Staff Software Engineer, you'll operate across the full lifecycle of either the payments or risk system: shaping architecture early in the design process, building self-service internal features and APIs, and owning their performance long after launch.

That means engineering the core business engine, enabling product teams with reliable backend services, and setting the engineering standard for those around you. If you're drawn to enabling world-class money movement or financial risk system with impact , helping power the livelihoods of millions using Gusto products , join us!

About the Teams:

Payments – The Payments team owns all money movement operations across Gusto's suite of products , enabling funds to move safely between partners, employers, employees, and government authorities. As a Payments Engineer, you'll build new payments capabilities across US and international markets, and help rearchitect our payments platform to scale for the future.

Risk – The Risk team builds best-in-class experiences that protect Gusto and our customers from financial and reputational harm. As a Risk Engineer, you'll develop infrastructure for two core areas: bad actor prevention , stopping fraudsters from abusing Gusto's platform while reducing false positives , and credit underwriting and collections, enabling faster, broader access to credit while minimizing financial loss.

Here’s what you’ll do day-to-day:

• Design, build, and test Gusto core money movement or risk platform services – payment rails, ledgering, wallets, fraud, decisioning engine, KYC, AML, and compliance capabilities, among others
• Mentor other engineers to help solve some of the hardest technical problems out there in very complex domains and at a large scale
• Help scale one of the largest Ruby/Rails and Javascript/React applications in the world
• Collaborate with our Product Engineering, Product Management, Data, Design, and financial operations teams to understand customer pain points, come up with solutions, and then prototype, iterate, and launch
• Build platforms that engineering teams rely on, and trust to deliver products that our customers genuinely love

Here’s what we're looking for:

• Successful applicants typically have 8+ years of software development experience
• Passion for creating scalable, efficient money movement platforms for users
• Experience leveraging AI tools or systems to accelerate development, improve testing, and deliver new platform capabilities
• Curiosity and experimentation with emerging AI frameworks, applying and sharing best practices to evaluate and scale AI use safely across teams
• Experience owning multi-quarter projects that solve complex engineering problems and make measurable user impact at scale
• Experience with large scale refactors, performance and reliability issues, and a strong sense of ownership over all aspects of your platform area
• Ability to mentor engineers to maximize their performance and impact

Others:

• 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

Do you prefer a non-payments or risk-specific platform role instead? Check out our Staff Software Engineer, Core Platforms job listing. Please note that a two day travel to a Gusto office for onboarding is required for this position. If you have any questions regarding this requirement, please share with your recruiter.

Our cash compensation amount for this role is targeted at $163,000–$204,000 in Denver & most remote locations, and $197,000–$247,000 for San Francisco & New York. Stock equity is additional. Final offer amounts are determined by multiple factors including candidate experience and expertise and may vary from the amounts listed above.

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Key responsibilities include:

• Maintaining research infrastructure, ensuring health, and optimizing components to extract peak performance from the system (both on application and infrastructure side)
• Scaling infrastructure to meet growing research demands while maintaining reliability and performance
• Collaborating with research teams to deeply understand their infrastructure needs, and design solutions that balance performance with cost efficiency
• Identifying and resolving performance bottlenecks and capacity hotspots through deep analysis of distributed systems at scale
• Building and evolving telemetry and monitoring systems to provide deep visibility into infrastructure performance, utilization, and costs across our cloud and datacenter fleets
• Participating in on-call rotations and incident response to maintain system reliability

Technical focus includes:

• Python, Bash, Go
• Kubernetes
• Nvidia GPU drivers and operators
• OTel, Prometheus

Requirements include:

• Experience building or operating large-scale training platforms
• Worked with large-scale compute clusters (GPUs)
• Proven ability to debug performance and reliability issues across large distributed fleets
• Strong problem-solving skills and ability to work independently
• Strong communication skills and the ability to work effectively with both internal and external partners
• Deep knowledge of modern cloud infrastructure including Kubernetes, Infrastructure as Code, AWS, and GCP
• Experience with SLURM

We offer a competitive base annual salary of $180,000-$300,000 USD and a hybrid work model with a meaningful in-person presence.

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