Top Engineering Jobs in San Francisco, CA

Architect and deliver native iOS and Android mobile features for Gusto’s personal finance platform using SwiftUI, Jetpack Compose, and GraphQL. Lead architecture, technical initiatives, infrastructure, testing, release pipelines, and post-launch scaling in a regulated banking environment. Collaborate with product, design, engineering, and banking partners; use AI tools to improve cross-platform development; and mentor engineers while establishing mobile standards and ensuring high-quality, secure experiences.

Design, build, test, and scale Gusto’s payments infrastructure and distributed systems. Lead architectural decisions, modernize legacy products, develop maintainable production code, and support payment experiences serving millions of businesses. Collaborate cross-functionally with Engineering, Product, Design, Data Science, and Operations teams while mentoring engineers and addressing complex scalability, reliability, and modularity challenges.

Design, build, and harden asynchronous infrastructure and developer tooling to improve engineer productivity. Lead architecture and code-level solutions for background jobs and async communication (Sidekiq, Kafka/Karafka), drive large-scale code migrations using AI, and collaborate with product engineers to measure and iterate on platform improvements and incident resilience.

Lead design and implementation of the Tax platform, scale Ruby/Rails and TypeScript/React systems, build APIs and tools for reliability and extensibility, integrate safe agentic AI guardrails, drive technical strategy and roadmap, improve incident response, and mentor engineers to deliver compliant, fault-tolerant systems.

Design, build, and maintain scalable Salesforce Apex solutions for Sales and Customer Experience teams. Use AI coding assistants throughout development, apply Salesforce architecture and release-management practices, deploy with sf CLI, and build reliable production systems at scale. Translate ambiguous requirements into scalable technical solutions, measure feature impact, and contribute to non-Salesforce codebases when needed.

Build and own Gusto’s AI agent platform for support advocates, including the LLM agent runtime, tool/action layer, Rails/GraphQL backend, frontend experience, and evaluation/monitoring systems. Work with LLMs, retrieval, prompting, and feedback loops to improve reliability and safety, ship autonomous actions with human approval, and partner with Product, Data, Design, and CX. Mentor engineers and help set engineering standards for trustworthy agentic systems.

Lead design and delivery of Gusto's Commerce Platform components (catalog, promotions, subscriptions, entitlements). Own architecture, reliability, and performance; drive multi-quarter projects; partner with product, data science, and cross-functional teams; mentor engineers; and promote AI-augmented development and platform adoption to accelerate business impact.

The Principal Software Engineer will lead technical direction for Gusto's Money Group, focusing on systems architecture, service migration, mentoring engineers, and driving complex projects in fintech. Responsibilities include defining long-term vision and ensuring quality delivery across multiple teams.

Design, build, and maintain Gusto core products (Payroll, Benefits, HR, Retirement, Gusto Money, etc.). Work across frontend and backend, scale Ruby on Rails and JavaScript/React systems, prototype and launch features, own multi-quarter projects, mentor engineers, resolve large-scale refactors, performance and reliability issues, and apply AI tools to improve development and product capabilities.

The Senior Staff Software Engineer will lead the technical direction of Gusto's Commerce Platform, focusing on system architecture, project delivery, mentoring, and collaborating with product teams to enhance the platform's reliability and performance.