Top Engineering Jobs in San Francisco, CA

Lead full-stack development of the signup-to-activation experience, inventing and shipping 0-to-1 AI-driven onboarding features across web, messaging channels, and third-party AI assistants. Collaborate with product, design, and data, mentor engineers, scope rapidly, and measure/iterate to improve activation metrics.

Lead full‑stack engineering work on tax experiences: design, build, test, and operate scalable systems for tax collection, payment, and filing. Drive technical strategy, mentor engineers, collaborate cross-functionally, prioritize long-term architecture, and apply AI tools to improve developer productivity and customer workflows.

Design, build, and harden asynchronous infrastructure and developer tooling to improve engineer productivity. Work on background jobs and async communication using Sidekiq, Kafka, and Karafka, collaborate with product engineers, and apply AI/LLMs for large-scale code migrations and faster incident resolution.

Lead design and implementation of the Tax platform: build scalable, fault-tolerant systems, improve extensibility, mentor engineers, drive technical strategy and roadmap, collaborate cross-functionally, improve reliability/incident response, and build AI guardrails to safely leverage agentic LLMs for tax compliance.

Lead design, build, and operation of AI-powered Growth experiences (conversational onboarding and AI-driven email). Own technical strategy for an AI Voice Agent and ACE-powered email systems, design APIs and frontend/backends, partner cross-functionally, establish applied-AI engineering patterns, measure impact, and mentor engineers to improve product quality and responsible AI use.

Lead full-stack development for employer and employee tax account systems: design reliable backend APIs and data models, build automation and agency-integration pipelines, model jurisdiction-specific compliance rules, mentor engineers, partner with product and operations, and deliver scalable, test-driven solutions that ensure tax accuracy and reliability at scale.

Lead full‑stack development for Gusto's PEO Benefits product: design and build benefits shopping, plan recommendation flows, carrier integrations, automation agents, and MCP tools; scale Ruby/Rails and JavaScript/React systems; mentor engineers; drive multi‑quarter, cross‑functional projects from spec through launch and iteration; collaborate with Product, Data, Design, and Platform teams to deliver customer‑facing features.

Lead architecture, build, test, and scale Gusto's iOS app and mobile infrastructure. Improve build pipelines, automated testing, release processes, and foundational services (push, accessibility, localization). Collaborate across product, design, security, and infrastructure teams; prototype, iterate, and launch customer-focused features while mentoring engineers.

In this role, you'll architect and manage distributed database systems, oversee complex migrations, optimize performance, and mentor engineers, driving operational excellence.

Lead design and build of scalable, resilient backend systems for Gusto Money products. Own projects end-to-end, adopt AI tooling, collaborate cross-functionally, and mentor engineers while driving product development from concept to launch.