Top Engineering Jobs in San Francisco, CA

Build and evolve backend payroll platform services and APIs used by multiple engineering teams. Own a core domain, ensuring correctness, scalability, reliability, performance, and observability. Lead architecture and design decisions, solve ambiguous technical problems independently, and partner with product and engineering teams on platform adoption. Collaborate cross-functionally to deliver compliant payroll capabilities while promoting responsible use of AI-assisted development tools.

Build customer-facing full-stack experiences for recommendations, nurture campaigns, booking flows, and plan upgrades. Design reliable backend APIs and data models, run experiments, improve conversion and retention, mentor engineers, and collaborate with Product, Design, Data, and Platform teams. The role requires ownership of complex, multi-quarter projects, scalable architecture, refactoring, performance, reliability, and responsible use of AI tools.

Own the technical direction and business outcomes of Gusto’s expansion funnel, including recommendations, conversion journeys, experimentation, and retained revenue growth. Partner with Product, Design, and Data Science to shape roadmaps, make scoping decisions, build scalable architecture, and iterate based on data. Provide technical leadership through code reviews, mentoring, delegation, refactoring, and reliability improvements while delivering customer-facing products at scale.

Lead organization-wide technical initiatives for Gusto’s API and AI agent platform. Design reliable, scalable API contracts and agent-facing tools, write clean Ruby on Rails code, mentor engineers, improve reliability and observability, engage developer customers, and troubleshoot production issues.

Build and operate AWS cloud infrastructure using Terraform/OpenTofu and Spacelift. Lead multi-account architecture migrations, develop reusable infrastructure modules, improve reliability and disaster recovery, support compliance, troubleshoot cloud environments, and automate recurring issues. Partner with engineering teams, strengthen observability and incident response, and participate in an internal infrastructure support on-call rotation. The role also drives multi-quarter platform initiatives with significant autonomy.

Own the end-to-end PEO onboarding experience, from discovery through setup. Set technical direction, design durable full-stack solutions, integrate systems across teams, and improve conversion through funnel instrumentation and experimentation. Build in a regulated domain with strong quality, testing, and observability standards. Use AI tools in engineering workflows and develop AI-assisted customer guidance. Influence cross-functional partners and raise engineering standards across the team.

Build and own backend services and APIs supporting retirement money movement, payments, settlements, reconciliation, compliance integrations, payroll, and financial workflows. The role involves shipping reliable production code, debugging incidents, improving observability, partnering with product, compliance, and operations, and mentoring engineers. Candidates should have extensive software engineering experience, financial systems expertise, end-to-end ownership, and Ruby on Rails or comparable backend framework experience.

Build and own backend services and APIs supporting money movement, payments, settlements, reconciliation, payroll integrations, retirement workflows, and financial compliance. Ship reliable production code, debug incidents, improve observability and operational tooling, and collaborate with product, compliance, operations, and engineering teams. Mentor engineers and ensure systems handling customer funds are correct, scalable, and well tested.

Own end-to-end delivery of greenfield, full-stack product areas for Gusto Solo. Design scalable architectures and data models, build backend APIs and frontend experiences, use AI tools and develop AI-native features including MCP tools, and collaborate with Product, Design, Data Science, and GTM. Help shape product direction, engineering practices, and technical foundations in a high-autonomy environment.

Design, build, test, and scale Gusto’s invoicing and billing platform, including subscriptions, orders, invoice generation, payments, reporting, and accounting integrations. Lead architecture, performance, reliability, and large-scale refactoring for high-throughput distributed systems. Mentor engineers, collaborate across product and business teams, support new billing models, and use AI tools to accelerate development and testing.