Top Engineering Jobs in San Francisco, CA

Lead and grow the Money Movement engineering team responsible for Gusto’s payment rails, APIs, partner integrations, and tier-one money movement systems. Coach engineers, recruit talent, guide technical execution, own reliability and on-call operations, and collaborate with Product, Operations, Accounting, and Treasury. Drive migration from the monolith to a standalone Payments Service with modular APIs, expand domestic and international payment capabilities, and ensure secure, compliant, scalable, and cost-effective payment processing.

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.

Own and improve Gusto’s signup-to-activation experience across web and emerging channels. Build full-stack, customer-facing products, prototype AI-powered onboarding experiences, partner with Product, Design, and Data, and measure outcomes through rapid iteration. Provide technical direction, mentor engineers, make pragmatic scoping decisions, and develop modular onboarding foundations for scalable growth.

Own audiovisual engineering standards, designs, programming, and implementations across Gusto’s multi-site office footprint. Lead production technology for executive and customer-facing events, manage the Zoom-to-Google Meet migration, administer meeting-room and streaming platforms, and oversee AV capital planning, vendors, and integrators. Serve as the escalation point for support teams, automate AV reporting and documentation with AI, and coach technicians. The role is hands-on, San Francisco-based, and includes travel to Gusto sites and event-hours flexibility.

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 architecture, development, testing, and refinement of Gusto's iOS app and embedded mobile web views. Scale shared services and mobile infrastructure (build pipelines, CI/CD, test automation, release processes), implement core platform features (push notifications, accessibility, localization), use AI agents to accelerate delivery, collaborate cross-functionally, and mentor engineers while iterating on product features that integrate core business and financial functions.

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.

As a Principal Software Engineer, design, build, and test scalable payroll and tax systems, lead technical efforts across teams, mentor engineers, and integrate AI solutions to enhance product efficiency.

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.