Top Backend Engineer Jobs in San Francisco, CA

Design and operate scalable, event-driven backend systems in Python for AI-native financial products. Build typed APIs (FastAPI + Pydantic), own data and ledger architectures, develop reliability primitives, partner with ML teams to productionize models, and ship platform foundations for audited, high-throughput financial workflows.

Lead backend engineering for a consumer mobile product: design, build and own Rust-based microservices, define APIs and data models, coordinate with mobile teams, drive architecture and execution, and raise engineering standards across backend and mobile codebases.

The Staff Back-End Engineer will lead technical initiatives, improve financial systems' reliability, and mentor engineers in backend engineering using Ruby on Rails.

As a Backend Engineer, you will develop scalable systems, optimize performance, mentor junior engineers, and lead critical projects at Hebbia's Agent Collaboration platform.

As a Backend Engineer, you'll build and maintain APIs and backend systems, optimize performance, mentor junior engineers, and drive user engagement for Hebbia's AI platform.

The Backend Engineer will design and implement efficient backend systems and APIs, optimize performance for large-scale data, and mentor junior engineers.

The Marketing Backend Developer will build and maintain backend services and APIs for marketing operations, ensuring reliable data flow and system integrations, with a focus on performance and scalability.

Senior Backend Engineer responsible for building, deploying, and monitoring backend applications. Collaborate with product and cross-functional teams to design/version APIs, build event-driven/asynchronous systems, improve performance and reliability, and drive CI/CD and observability best practices. Ship high-quality, well-tested features and support platform scalability and maintainability.

As a Back-End Engineer, you will design, implement, and maintain core infrastructure while ensuring performance, scalability, and reliability in a fintech environment.

You will tackle AI challenges, develop scalable software and collaborate with teams to enhance healthcare navigation using AI solutions.

The Senior Backend Engineer will enhance the backend platform by developing scalable services and APIs, drive the software lifecycle, mentor others, and utilize AI tools to improve workflows.

The Product Engineer will develop and maintain core software, drive product direction, integrate AI solutions, and work with customer feedback. They will own back-end systems and collaborate with design and engineering teams.

Design and operate scalable, event-driven backend systems in Python to power agentic AI workflows and real-time financial infrastructure. Own APIs, data architecture, reliability primitives, and platform foundations while partnering with ML and product teams to productionize AI-native financial systems.

As a Sr. Software Engineer, Backend, you will develop AI-powered solutions for clinical documentation and medical coding, collaborating with cross-functional teams to enhance SaaS products and deliver actionable insights for healthcare organizations.

Design, build, and deploy backend services for creative tools. Integrate with AWS, ensuring scalable and secure Python code for event processing and APIs.

As an AI Backend Engineer, you'll design and develop backend systems for AI agents, ensuring reliability, security, and performance in production environments. Collaborate across teams to implement AI workflows and scalable systems while maintaining a focus on delivering features rapidly and effectively.

The Senior AI Backend Engineer will design and build backend services to power multimodal AI agents, ensuring performance, security, and reliability. Responsibilities include developing AI orchestration pipelines, implementing security measures, and mentoring less experienced engineers while collaborating across teams to enhance AI features for enterprise customers.

As a Backend Engineer, you will design and maintain APIs and databases, improve system performance, and implement new features for web and mobile applications.

The Experienced Backend Engineer will architect solutions, mentor engineers, design and enhance critical systems, and build reliable services for Stytch's product roadmap.

Build enterprise-grade authentication, authorization, and identity features across the full stack. Design and implement RBAC, provisioning (SCIM), SSO/OAuth integrations, secure public APIs, and admin workflows for auditing and compliance. Own end-to-end product changes, collaborate on architecture, and mentor engineers to deliver scalable, reliable systems for enterprise customers.

As a Backend Engineer, you will architect, build, and deploy systems for our data science platform, collaborating with a cross-functional team to enhance machine learning practices.

As a Backend Engineer, you'll design scalable infrastructure, mentor teammates, and collaborate with teams to deploy effective solutions.

As a Backend Engineer, you'll design, implement, and operate critical scalable services, collaborate across teams, and uphold best practices for software quality and system operations.

As a Backend Engineer, you'll design, build, and maintain backend services, collaborate with teams across the stack, and contribute to product feature development.

As a Staff Backend Engineer, you'll lead the development of backend features in a Django monolith, optimize database performance, and mentor other engineers.