Top Full-Stack Engineer Jobs in San Francisco, CA

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.

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.

Architect low-latency .NET APIs and backend services while building Angular interfaces for a financial services platform. Develop microservices and message-driven systems, maintain automated test coverage, conduct code reviews, manage CI/CD and production observability, and define OpenAPI contracts. Collaborate in Agile/Scrum teams to deliver analytical investment tools supporting substantial customer assets.

Build end-to-end product features for a construction intelligence platform: implement high-performance React front-ends, Python/Postgres backends, work on document intelligence, search, change detection and large-scale data processing, ship with customers, and collaborate with founders.

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.

Build and ship 0-to-1 product experiments across the full stack, with emphasis on frontend development and product experience. Translate ambiguous user needs and emerging technical capabilities into testable concepts, guide iteration through research and metrics, and own technical direction from prototype through scaling or handoff. Collaborate with design, product, research, and engineering teams in a fast-moving, high-autonomy environment.

Build and operate Triumph’s full-stack product platform, including payments, ledger systems, identity, fraud prevention, notifications, operational dashboards, and infrastructure. Ensure critical systems are reliable, auditable, and scalable across products, countries, currencies, and 16x growth. Develop new payment rails, trust tooling, and platform capabilities while using AI agents throughout the software development lifecycle.

Build and own backend-focused case execution systems covering eligibility, batching, submissions, operational workflows, and claim orchestration. Solve complex data-driven decision logic, improve workflow reliability, collaborate across engineering and product teams, and contribute to React-based internal tools and administrative workflows. The role requires strong Python experience, fullstack engineering fundamentals, and ownership in a fast-moving startup environment.

Develop and ship full-stack web and mobile experiences across Affirm’s consumer app and website. Collaborate with product, design, analytics, and engineering teams to break down projects, make technical decisions, write tested and extensible code, launch scalable APIs, monitor service health, support on-call operations, review code, and participate in team development and interviewing.

Build and launch full-stack patient, clinician, and healthcare partner features across web, mobile, backend, AI, and clinical integrations. Responsibilities include developing workflows, connecting AI consultations to treatment, improving performance, privacy, accessibility, and reliability, using coding agents, automating engineering tasks, and supporting products in production. The role requires strong product judgment, autonomy, cross-functional communication, and the ability to ship across unfamiliar systems.

Own end-to-end product features for a SaaS platform serving HR, therapists, and employees. Build, scale, and evolve frontend and backend components, lead architecture and standards, collaborate with design and product, and incorporate customer feedback and QA. Work in an early-stage startup environment with product-focused ownership.

As a Fullstack Engineer, you'll design, build, and operate web applications, collaborating with product teams and mentoring peers while ensuring best practices in coding and system architecture.

Design and implement full‑stack, low‑latency web-based Ground Control Station and C2 systems (map-centric UIs, real-time telemetry, video streaming), lead architecture and APIs, mentor engineers, support field tests and mission deployments, and ensure interoperability with C2 standards.

Build and scale consumer-facing mobile and web applications and backend services. Own features end-to-end across frontend and backend, optimize databases and queries, integrate third-party APIs, implement algorithms for risk and transaction evaluation, improve reliability and CI/CD, and contribute to testing, monitoring, and internal tools to support customer operations.

Senior fullstack engineer to build and scale Brigit's consumer finance platform. Own end-to-end features across frontend (React/React Native/TypeScript) and backend (Java/REST/SQL), optimize database and APIs for high scale, integrate 3rd-party services, implement risk and transaction algorithms, improve CI/CD, testing, monitoring, and internal tooling to support millions of users.

Design, build and maintain Microsoft Cloud applications using Power Apps/Pages and Azure services. Implement Entra ID authentication, Azure Functions/App Services, Logic Apps and Blob storage. Create Azure Data Factory pipelines and APIs (REST/GraphQL), integrate external services and LLM data pipelines, and ensure performance, security, and scalability while collaborating with customers to turn requirements into streamlined apps.

Design, build, and maintain cross-platform mobile applications and end-to-end web features. Implement front-end interfaces, back-end services and RESTful APIs, optimize databases, write tests and documentation, perform code reviews, and collaborate with UX, QA, and DevOps to deliver high-quality, secure, and performant solutions.

Build and maintain scalable full-stack features for Roo’s veterinary staffing marketplace. Develop across the React Native mobile app and backend services, contribute to architecture, write unit and end-to-end tests, resolve production issues, improve observability and reliability, and support deployments and CI/CD. Collaborate with product, design, data, DevOps, and engineering teams while mentoring junior engineers and driving technical improvements.

Build and maintain core products and collaborate on larger consulting projects using TypeScript, Python, FastAPI, Next.js, GCP, and generative AI frameworks. The role involves hands-on software development within a rapidly growing, remote team serving Saudi Arabia and the GCC.

Build and ship enterprise WordPress features across frontend and backend, including custom Gutenberg blocks, React components, plugins, themes, PHP, HTML, and CSS. Own tickets from requirements through production, translate Figma designs into responsive experiences, use AI-assisted development responsibly, and collaborate asynchronously in English with distributed engineering, design, and delivery teams.

Own Sidecar Health’s search platform end to end, including AWS OpenSearch clusters, indexing pipelines, search APIs, relevance and ranking, hybrid lexical and semantic retrieval, observability, quality reporting, and incident response. Lead search architecture, expand support for healthcare content types, improve near-real-time indexing, communicate technical direction across teams, mentor engineers, and build internal relevance and analytics tooling using agentic developer tools.

Develop scalable Java Spring Boot APIs, microservices, React-based interfaces, ETL pipelines, and SQL data solutions. Deploy workloads on AWS, optimize performance, implement monitoring and automation, and collaborate with product, frontend, data, and DevOps teams. The role also contributes to architecture, accessibility, reliability, and data-driven product improvements.

Lead backend TypeScript development and maintain services used by ~5M users. Contribute to full-stack features, code reviews, architecture discussions, mentor engineers, and collaborate with PM/design to build React-based web and mobile experiences.

As a Staff Software Engineer, you will drive technical direction for financial audit, mentor engineers, and design AI-driven workflows while collaborating on product development.

As a Senior Software Engineer, you will design agent-driven financial audit workflows, lead projects, mentor engineers, and collaborate across teams to innovate in audit technology.