Top Senior Full-Stack Engineer Jobs in San Francisco, CA

As a Senior Full Stack Engineer, you'll design and implement new product features, build secure backend infrastructure, and collaborate with a diverse team to enhance user experience in vision care.

Lead technical design and delivery of full‑stack web applications. Write and maintain high‑quality code across frontend and backend, design scalable APIs, use AI‑assisted development tools, mentor junior engineers, run code reviews, champion testing and CI/CD, and collaborate with product and hardware teams to troubleshoot and optimize production systems.

As a Full Stack Software Engineer, you will build and improve user-facing products, collaborate with cross-functional teams, and design robust APIs.

As a Senior Full-Stack Engineer, you will architect technology for web products, lead feature ownership, mentor juniors, and enhance system performance.

The Sr Full Stack Developer will work primarily on backend development, with some UI work, and is expected to code actively. A positive attitude and drive for conversion to full-time are essential.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Design, build, and operate end-to-end features across a React frontend and Node.js/TypeScript backend. Implement secure, performant APIs, model and optimize PostgreSQL data, deploy and monitor services on AWS, improve engineering standards through code reviews and testing, troubleshoot production issues, and contribute to scalable system architecture in a distributed team.

Lead architecture and implementation of scalable web applications using NestJS and Next.js. Build and optimize PostgreSQL schemas and queries, implement responsive UIs with Tailwind CSS, integrate LangChain-driven AI features, manage authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and reliable user experiences.

Design, build, and scale full‑stack rental systems. Lead frontend architecture and implement complex UIs, integrate and design APIs, optimize performance and accessibility, drive code quality and testing, and collaborate cross‑functionally to deliver scalable microservices on AWS.

Design and build features across a React/TypeScript frontend and Go backend for real-time dispatch systems. Implement WebSocket-driven tracking, GIS integrations, multi-tenant architectures, performance and state management improvements, production debugging, and collaborate with Product and Operations to deliver agency commitments.

As a Senior Fullstack Engineer, you'll architect and build a high-concurrency auction engine, leveraging AI for enhanced user experiences and system reliability.

As a Senior Fullstack Engineer, you'll build financial systems, design lending infrastructure, implement payment integrations, and create user interfaces, ensuring correctness and reliability.

The Senior Full Stack Engineer builds and ships features across frontend and backend systems, working with various frameworks and databases, while collaborating on technical specifications and improving developer experiences.

As a Senior Full-Stack Engineer at ClassDojo, you'll deliver code and features collaboratively, improve systems and practices, and mentor other engineers, all while impacting education for millions of children.

Design and build scalable SaaS solutions, collaborate with other engineers, and ensure quality UI interactions while incorporating user feedback.

Design and maintain federated GraphQL schemas and server-driven UI; build fast, accessible front-end apps with React and TypeScript; develop and optimize GraphQL/SQL backends; operate production services (Kubernetes, observability in DataDog), own releases and on-call rotations; drive testing, CI/CD, technical debt reduction, mentoring, and cross-team coordination.

Lead design, build, and scale GridUnity's cloud SaaS platform. Own end-to-end features, mentor engineers, drive architecture, improve scalability, reliability, security, and data practices while collaborating with product teams.

Embed with brokerage operations to observe and replace manual workflows with auditable automations and UIs. Design, build, deploy, monitor, and run production systems; instrument outcome metrics; collaborate with compliance, security, and domain experts; own full lifecycle including CI/CD, on-call, and incident response.

Join the Entefy team as a Senior Full Stack Engineer to build a scalable full stack application enhancing digital interaction for global clients.

The Sr Product Software Engineer will design, implement, and optimize ad decisioning software within a microservice environment, collaborating with data science and utilizing AI/ML technologies.

As a Full Stack Engineer, you will develop full stack features, scalable APIs, and user interfaces for AI-driven code review tools. Collaborate with teams to deliver high-quality solutions and enhance developer workflows.

The role involves developing and managing key components of Sphere's platform, such as the tax engine and filing infrastructure, while mentoring other engineers and improving efficiency based on customer feedback.

As a Senior Software Engineer, you will take ownership of the full development lifecycle, solve technical problems, and lead technical excellence while collaborating with cross-functional teams.

Lead development of early product, build features for onboarding and account opening, influence technical vision, mentor engineers, and ensure smooth production operations.

Senior Full Stack Engineer (backend-focused) to design, build, and operate scalable backend systems and APIs, deliver full-stack features, improve reliability and observability, and contribute to architecture and technical strategy in a fast-paced startup environment.