Top Full-Stack Engineer Jobs in San Francisco, CA

Build and own an ads engine end to end, including data pipelines, agent tools, user interfaces, ad generation, localization, launching, and performance learning. The role requires direct user engagement, product judgment, rapid experimentation, and full-stack engineering. You will independently define product direction, ship initial versions, and potentially develop competitive intelligence briefs or new ad formats using LLMs and agent technologies.

Lead full-stack engineering projects across Harvey’s product lines, scaling document ingestion, data collection, secure systems, and AI-native features. Build intuitive experiences across web, desktop, mobile, Google Docs, Microsoft Word, and APIs. Develop frontend applications with React and TypeScript and backend systems with Python and PostgreSQL, supporting streaming results, long-running processes, agentic orchestration, retrieval, and complex tool-calling workflows.

Build and maintain scalable full-stack web applications for Snap’s user-facing products. Develop interfaces and services, optimize performance, contribute to shared libraries, analyze operational and engagement metrics, and use AI-assisted workflows while maintaining code quality, security, scalability, and production readiness.

Lead full-stack software features from discovery through deployment and refinement. Build machine-learning workflows with human review, user interfaces for operations and analytics, APIs, databases, server-side logic, and browser applications. Engage directly with business clients to define requirements, make product tradeoffs, launch new product areas, and support rollouts. The role requires startup experience, production LLM feature delivery, and a hybrid schedule with four days per week in the San Francisco office.

Leads technical vision and architecture for customer resiliency systems. Designs scalable, operable solutions; modernizes monoliths into microservices and event-driven platforms; establishes API and engineering standards; and contributes hands-on across the software lifecycle. Collaborates with senior leaders, mentors engineers, drives cross-divisional initiatives, promotes engineering excellence, and advises on enterprise architecture, cloud computing, data architecture, performance, and scalability.

Build, maintain, and release features across JavaScript and TypeScript frontends, backend services, databases, and cloud infrastructure. The role involves fixing defects, owning critical live services, developing APIs and data pipelines, improving automated test coverage, and translating ambiguous requirements into production software. The developer will also create workflows for processing engineering drawings and design files while collaborating closely with a small founding team.

Build and evolve ngrok’s AI Gateway, including real-time AI traffic handling, policy enforcement, rate limits, usage caps, access rules, token tracking, observability, and explainability. Design customer-focused gateway abstractions and collaborate with Gateway, Customer Data, Platform, product, and design teams to align enforcement, usage, and billing signals. The role involves full-stack development using primarily Go and TypeScript in a production AWS, Kubernetes, and distributed-systems environment.

Build and operate scalable Ruby on Rails APIs and React interfaces for data activation. Responsibilities include API design, performance and reliability improvements, automated testing, production troubleshooting, documentation, architecture discussions, incident response, and cross-functional collaboration. The role requires secure, maintainable software development and responsible use of AI-assisted tools, with opportunities to establish API standards and mentor engineers.

Lead technical vision and architecture across engineering domains, decompose complex problems, and ensure scalable, operable implementations. Modernize monolithic systems into microservices and event-driven platforms, define API and platform standards, and guide cross-divisional initiatives. Provide hands-on technical contributions while mentoring engineers, promoting engineering excellence, recruiting talent, and communicating technical knowledge across the organization.

Build and ship end-to-end full-stack products combining frontend, backend, and LLM orchestration. Develop AI-powered workflows, rapidly prototype customer solutions, and scale platform security, observability, and performance for enterprise use. Collaborate directly with customers and subject matter experts, contribute to product strategy, and mentor engineers while establishing technical best practices in a fast-growing founding team.

Designs and develops scalable full-stack eCommerce platforms using Java, Spring Boot, React, and TypeScript. Leads microservices and micro-frontend architecture, cloud-hosted platforms, distributed data and messaging solutions, streaming and batch pipelines, payment integrations, performance optimization, accessibility, and PCI-DSS compliance. Provides technical leadership, mentoring, architecture guidance, code reviews, documentation, and cross-functional collaboration.

Build and maintain scalable, high-performance full-stack applications using React and modern web technologies. Integrate backend services, RESTful APIs, and databases while collaborating with designers, product managers, and backend engineers. Participate in code reviews, technical discussions, debugging, and product ideation, with a focus on maintainable, efficient code and user-centered solutions.

Build and maintain production-grade full-stack healthcare software using React, TypeScript, Python, FastAPI, GraphQL, and relational databases. Own features end-to-end across backend APIs, frontend interfaces, authentication, patient/provider workflows, integrations, testing, security, and search capabilities. Collaborate with product, design, and engineering teams to deliver reliable, user-friendly clinical solutions.

Owns full-stack application features from architecture and data modeling through frontend delivery and ongoing refinement. Builds TypeScript backend services, APIs, and React interfaces for complex workflows, including AI-powered recommendations and agent-driven experiences. Integrates legacy record-keeping systems with AI capabilities in a regulated environment, designs secure scalable systems, performs zero-downtime migrations, and establishes AI-assisted development practices.

Build scalable full-stack and backend systems that unify fragmented construction software integrations. Develop APIs, front-end applications, caching layers, real-time communication, secure on-premise connections, and automated testing frameworks. Work directly with customers to research unique integration requirements, design ambiguous solutions, and rapidly ship reliable code supporting millions of daily API requests.

Develop and release full-stack software across e-commerce, connected-device, enterprise, logistics, access-control, and customer-service infrastructure. Build APIs and reliable, scalable web applications; investigate and resolve production issues; collaborate with engineers and product managers; and contribute to roadmap planning. The role involves Ruby on Rails, TypeScript, Next.js, React, cloud infrastructure, databases, caching, containerization, and infrastructure-as-code.

Own backend-leaning product features from concept through release for a software platform. Build Python APIs, storage layers, and data-processing workflows, while contributing to frontend development. Design scalable REST APIs, support production services, and implement logging, alerting, and automated testing. Collaborate with design, research, deployment, product, and engineering teams in a small, cross-functional environment.

Own end-to-end software projects for Hinge Health’s visit and scheduling platform. Build booking, encounter, visit-history, and after-visit-summary experiences across mobile, web, and backend services. Scale integrations, support new specialties, define SLOs, manage safe launches, respond to incidents, protect healthcare data, write design documents, review code, and mentor engineers.

Founding Full Stack Developer responsible for end-to-end SaaS feature delivery across Next.js and React frontends, FastAPI services, real-time WebSocket collaboration, AI workflow integration, data modeling, authentication, performance, testing, and cloud deployment. The role requires scaling production systems, integrating Firestore and Neo4j, and collaborating across engineering and product teams. Candidates will also complete a proof of concept involving course generation, a mini-app sandbox, background workflows, and deployed frontend/backend services.

Senior full-stack engineer who builds backend-heavy features and customer-facing React UIs. Own end-to-end delivery: design, implement, test, monitor, and iterate on scalable RESTful microservices using raw SQL and cloud patterns. Collaborate with product and design, review code, ensure reliability, security, and data correctness.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

Build REST APIs, customer-facing React components, backend monitoring, CI/CD pipelines, content management system integrations, and reliable features and services. The role requires JavaScript or TypeScript experience with React and Node.js, REST platform integrations, Git collaboration, HTML and Sass/CSS, server technologies, and cross-functional work with UX and visual designers. Experience with enterprise content management systems, AWS, Java, Freemarker, or Rust is advantageous.

Lead technical direction and implementation of large-scale product features, delivering secure, reliable, maintainable full-stack software. Collaborate with product, design, and engineering teams, address production issues, conduct code reviews, document solutions, and mentor teammates. Build and test front-end and server-side systems using modern frameworks, APIs, databases, and data-driven development practices.

Build and own full-stack enterprise features for Speak’s B2B product, including partner portals, admin dashboards, reporting, subscriptions, billing, and learner experiences. Design APIs, backend services, and multi-tenant data models; integrate authentication, entitlements, CRM, billing, and analytics. Collaborate cross-functionally, ensure privacy, security, observability, and data integrity, contribute to AI-assisted development workflows, and mentor engineers.

Develop and deliver production-grade full-stack software across .NET/C# backend services and React front-end applications. Build reliable, scalable AWS cloud solutions, optimize relational and document databases, implement CQRS, and integrate AI-assisted coding workflows. Validate AI-generated code for security, quality, and maintainability while establishing guardrails and review processes. Collaborate with Product and QA, participate in code reviews, uphold engineering standards, and mentor other engineers.