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

Develop scalable full-stack applications and services for millions of users, with a backend focus. Design APIs, event-driven systems, and database solutions; collaborate with product, UX, and engineering teams; promote automated testing, reliability, code quality, and incident management. Participate in on-call responsibilities, pair programming, technical mentoring, and evaluation of new technologies.

Own architecture and implementation across React, Node.js, and Web3 integrations. Build decentralized applications, integrate wallets, DeFi protocols, blockchain data, and third-party APIs, and scale real-time data infrastructure. Lead features from design through deployment and production support while improving performance, security, reliability, and interoperability. Work independently in a demanding startup environment with substantial technical ownership.

Build and optimize growth and retention features across a TypeScript backend and React frontend. Ship feature-flagged experiments, instrument patient journeys, analyze results, improve performance and accessibility, and maintain a high-quality consumer experience. Collaborate with product and design, review code, mentor engineers, and resolve patient experience incidents. The role is fully remote and supports a digital health platform.

Lead architecture and full-stack development for greenfield products and major system changes. Design scalable APIs, UIs, integration services, and durable workflows; integrate SaaS systems, third-party applications, and production LLM capabilities. Document architectural decisions, ensure maintainable code, troubleshoot integrations, improve observability and automation, and mentor teams while driving scalable improvements in delivery and quality.

Design and maintain scalable full-stack software solutions using Python and Pandas. Develop data infrastructure, integrate technologies, optimize application performance, and collaborate cross-functionally to deliver reliable products. The role requires strong AWS and scalable architecture expertise, with a focus on continuous improvement and customer impact.

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

Build and maintain Alpaca Connect developer-platform experiences using TypeScript, React, and Go. Improve onboarding, app management, compliance review, publishing, consent, and permissions workflows. Design APIs and integrations with identity, account, trading, and market-data systems while creating secure, auditable self-service tools. Own features from design through production and collaborate with Product, Design, Compliance, Support, Partnerships, and Platform teams.

Own customer-facing full-stack web application development from prototype through launch. Build polished React interfaces, APIs, and scalable Node.js backend services; integrate generative AI models; lead major product initiatives; establish coding and quality standards; and coach engineers. Collaborate with product, sales, marketing, and leadership in an on-site startup environment.

The Senior Fullstack Software Engineer will design, implement, and maintain features for Conveyor's SaaS platform, involving both backend and frontend work, while collaborating closely with team members and mentoring juniors.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Lead the design, development, and implementation of resilient pricing tools using Python and cloud technologies. Improve automation, deployment reliability, testing, documentation, and technical standards. Coordinate complex projects, research new development practices, identify technical blockers, and mentor junior developers. Collaborate with stakeholders while developing expertise in insurance pricing and supporting applications built with technologies such as Streamlit, Flask, Docker, Kubernetes, and cloud compute.

Deploys, configures, integrates, and operates Databricks and enterprise cloud data infrastructure for HUD. Automates infrastructure through IaC, scripting, APIs, and CI/CD; configures security, identity, access, compute, storage, and Unity Catalog. Supports data pipelines and Databricks applications, troubleshoots platform and integration issues, documents procedures, collaborates with cloud, cybersecurity, DevSecOps, and application teams, and provides technical leadership.

Senior full-stack engineer responsible for owning mission-critical software from requirements through deployment and sustainment. The role involves working directly with government users and technical stakeholders, architecting and building products across the stack, integrating with government IT systems, and ensuring security and compliance within DoD environments. The engineer will make product and architectural decisions, support technical proposal artifacts, and travel up to 50% to engage with mission owners in the field.

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.

This role involves developing and maintaining front and backend code for a cloud-based web platform, collaborating with product teams, and providing technical leadership.

Design, implement, and test customer-facing features and internal tools; build and maintain secure, production backend infrastructure; deploy and monitor applications; conduct code reviews; collaborate cross-functionally to deliver performant, user-focused web experiences.

Design, develop, and maintain scalable web services for a B2B SaaS application. Write tested code primarily in Go, manage PostgreSQL schemas and queries, and research AI-powered tools for software development and CI/CD optimization. Collaborate with product, design, and engineering teams to deliver user-focused solutions. Mentor engineers, promote best practices, and contribute to technical excellence.

Lead end-to-end development of scalable web applications using Node.js, React, MongoDB, and Google Cloud. Build analytics, identity resolution, personalization, integrations, and advanced visualizations using AI-assisted, spec-driven workflows. Develop LLM integrations, configure AI agents, maintain MCP servers, automate testing and CI/CD, and support observability. Serve as a Feature Lead by guiding architecture, technical specifications, documentation, and cross-functional communication.

Build and maintain scalable full-stack products and services in an agile team. Design, develop, test, deploy, and debug backend services, APIs, frontend applications, data services, and integrations. Collaborate with product management and customers, write automated tests, support production systems, and balance rapid delivery with maintainability. The role requires backend and frontend expertise, database knowledge, API design experience, modern development tooling, and experience integrating AI tools into software development.

Architect, develop, and maintain full-stack frontend applications and backend services for Alpaca’s internal trading tools. Build user-facing features, design APIs, work with financial-market infrastructure, own projects from design through deployment, collaborate cross-functionally, and mentor engineers. The role requires strong systems programming, TypeScript/React, SQL, relational database, REST API, WebSocket, and cloud-platform expertise.

Lead complex, cross-team software initiatives from design through rollout; architect backend services, improve reliability and observability, guide technical strategy, mentor engineers, and elevate engineering quality. The role emphasizes AI-assisted coding, agentic development workflows, automated guardrails, testing, incident response, and solving ambiguous technical problems across consumer applications and internal tools.

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.

Design, build, deploy, and maintain full-stack applications spanning frontend interfaces, backend services, APIs, databases, integrations, and cloud infrastructure. Own complex systems, improve reliability and technical debt, make architectural decisions, mentor engineers, and contribute to code reviews and engineering practices. Evaluate AI-assisted development opportunities and collaborate with product teams, stakeholders, and customers to deliver secure, maintainable software capabilities.

Lead development of a new browser-based client for an existing mobile product. Own front-end architecture, React conventions, internal tooling, reporting dashboards, responsive interfaces, animations, performance tuning, and collaboration with backend engineers on service and data design. The role requires launching a consumer web product quickly in a highly autonomous startup environment.