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

Leads multiple technology projects and engineering teams while designing and implementing large-scale, distributed, cloud-native systems. Provides technical leadership across teams, shapes architecture and platform roadmaps, mentors engineers, drives reliability and performance, and partners with product leaders. Uses modern programming languages, cloud platforms, microservices, databases, containers, CI/CD, observability, and AI-based development tools to deliver secure solutions supporting regulatory and customer needs.

Build and scale backend-focused, full-stack web applications for Braze’s Cloud Data Ingestion and Data Transformation platforms. Drive architectural decisions, technical strategy, and end-to-end feature delivery. Develop scalable systems handling high-volume data and traffic, including automated pipelines, asynchronous processing, and ETL applications. Collaborate within an agile team while delivering reliable front-end and backend experiences that improve customer data integration and platform growth.

Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.

Build and ship customer-facing products across backend services, APIs, data models, React web interfaces, and Android point-of-sale applications. Learn unfamiliar platforms quickly, collaborate with product and design, deliver resilient code, and own testing, instrumentation, on-call support, and cleanup. The role emphasizes 0-to-1 product development, customer-focused decision-making, rapid experimentation, and using AI tools to improve development velocity and quality.

Build scalable, data-intensive products from the ground up, focusing on Java/Kotlin backend services, REST or GraphQL APIs, data access, and React/TypeScript interfaces. Responsibilities include architecture, performance optimization, testing, observability, production troubleshooting, technical documentation, and end-to-end feature ownership. Collaborate with data, reporting, design, and product teams while using AI-assisted development tools to accelerate delivery.

Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.

Own the specification, design, and implementation of features for FareHarbor’s large-scale web application. Collaborate with product teammates, develop scalable and performant full-stack solutions, improve automated testing, resolve technical issues, and participate in code reviews. The role requires strong Python and JavaScript skills, experience with front-end and back-end frameworks, relational databases, and production scalability challenges.

Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.

Build and maintain payment connectors and web/mobile applications, collaborate with designers and developers, implement new features, troubleshoot and optimize existing systems, adopt new technologies, and deliver high-quality solutions within an Agile team focused on ecommerce and payments integrations.

Build backend-focused full-stack systems and AI workflows, integrating language models into secure, scalable production services. Own projects from early concepts through delivery, scale systems as adoption grows, and improve architecture, observability, and code quality. The role requires independent execution, strong Python skills, and experience with APIs, distributed systems, or data-heavy backends. Healthcare technology experience and production generative AI experience are advantageous.

Own end-to-end customer-facing software for grid capacity analysis, project planning, and infrastructure decisions. Build interactive data-rich interfaces, backend-for-frontend services, APIs, and PostgreSQL data models. Collaborate with product, UX, backend, data, AI, and power systems teams to translate complex technical outputs into reliable product experiences. Independently clarify requirements, make technical tradeoffs, and ship production features in a rapidly evolving environment.

The Senior Full Stack Engineer will design and develop features for the platform, maintain code, and collaborate across teams to improve engineering processes.

Build and shape Supio’s AI-native legal technology platform as a product-minded full-stack engineer. Responsibilities include developing customer-facing applications, backend services, APIs, data pipelines, agent runtimes, voice and transcription capabilities, records extraction, legal document drafting, and evaluation and monitoring tools. The role requires end-to-end ownership, architectural influence, autonomy, product judgment, and experience working in fast-paced startup environments.

Build and own full-stack healthcare systems: design DB schemas and APIs, implement React frontends, operate services on Kubernetes/AWS, integrate agentic AI into product workflows, mentor engineers, and ensure secure PHI handling and high reliability for clinical use.

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

Build Haus’s Architect product end to end, developing Python backend services that convert model outputs into recommendations and React interfaces for customer approval. Integrate with platform systems, define API contracts, manage production reliability, and collaborate with product, science, and design. The role requires strong backend engineering, frontend proficiency, cloud operations, database experience, product judgment, testing, monitoring, and effective use of AI coding tools.

Designs, builds, tests, deploys, and optimizes full-stack product features using React and Python. Develops GraphQL integrations, scalable backend services, data visualizations, analytics instrumentation, and production-ready platform capabilities. Contributes to UX workflows, CI/CD, monitoring, code quality, and stakeholder updates while collaborating in agile sprints and evaluating new technologies.

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.

Own product surfaces end to end, shaping product and technical direction while building scalable, high-performance experiences across React, Next.js, and Node.js. Lead ambiguous initiatives from ideation through production, improve engineering quality and UX, use AI tools to accelerate development, mentor engineers, and deliver customer-facing value for experimentation and digital optimization products.

Own and operate product platform services, libraries, schemas, APIs, and developer tooling. Design scalable, reliable, secure system interactions; improve monitoring, testing, and operational signal; reduce engineering toil through reusable abstractions and automation; and partner with product, data, and infrastructure teams. The role spans identity, access, shared services, data flows, messaging, and cloud-native systems in a greenfield environment.

Lead technical direction and delivery for the Acquisition & Onboarding full‑stack team. Build and maintain mobile (React Native/native) and web experiences, backend services at scale, and operational tooling. Drive architecture, mentor engineers, ensure reliability/monitoring/on‑call readiness, collaborate with product and design, and improve dev processes, testing, and release practices to impact conversion and retention.

Design, build, and optimize scalable cloud and web software with focus on infrastructure, performance, and hardware integration for IoT devices. Collaborate with hardware teams to ensure connectivity and high availability, implement new features, and improve system efficiency.

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.

Build and own scalable fintech products end to end, partnering with product, design, and data teams. Design high-performance, event-driven systems, integrate AI models and autonomous agents, instrument features, monitor business outcomes, and optimize user experiences. Work across React, TypeScript, React Native, Laravel, PostgreSQL, and AWS while influencing technical strategy, architecture, and product decisions.

Build and own end-to-end healthcare product features across backend APIs and frontend interfaces. Develop secure GraphQL and REST services with Python and FastAPI, and responsive React/TypeScript applications. Manage data models, authentication, integrations, testing, feature flags, search, and event-driven workflows. Collaborate with design, product, and engineering teams to deliver reliable, user-friendly software for clinical care.