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 design and build a greenfield, high-throughput payments platform. Drive architecture, implement distributed backend services, scale cloud-native systems, integrate observability and AI tooling, own APIs, mentor engineers, and support production through CI/CD and on-call responsibilities.

Lead backend engineering for a mobile-first, backend-driven consumer app. Design, build, and own Rust-based microservices, APIs, feature-flagging, and UX configuration; partner with iOS/Android teams, provide architecture guidance, and drive delivery from design through production.

Design, build, and maintain backend services powering Clerkie's platform. Improve reliability, performance, scalability, observability, and support feature development. Participate in technical design, cross-functional collaboration, documentation, and own projects end-to-end in a fast-moving startup environment.

As a Staff Backend Engineer, you'll design and operate backend services, lead technical initiatives, ensure reliability, and mentor team members in a remote-first setup.

As a Staff Engineer for Revenue, you'll shape technical vision and architecture for billing and pricing systems, ensuring correctness while enhancing cross-team collaboration.

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.

Design and implement APIs and core services, build impactful features, mentor engineers, and enhance application quality for a mission-critical system.

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

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.

The Software Engineer, Backend will develop scalable distributed systems, build REST APIs, and ensure high-quality software delivery while collaborating with teammates and stakeholders.

Design and build production-grade serverless backend services and APIs for contact center systems. Implement observability, integrations, migration tooling, and AI-enabled workflows to improve routing, agent support, and operational visibility.

Design and implement scalable backend infrastructure for an AI-native security platform. Build and operate code-execution pipelines, agent orchestration, evaluation and training pipelines, and mentor engineers to ensure performance, reliability, and secure architecture at enterprise scale.

As a Staff Backend Engineer, you'll manage systems and APIs, optimize truck routing and payment processing, and integrate with telematics providers while utilizing AI coding tools.

As a Staff Backend Engineer, you'll design scalable solutions, lead technical architecture, contribute to products, and work in a dynamic environment with a focus on high-quality code.

Build and scale backend systems for the Lapel platform, design APIs, manage database schemas, and optimize performance. Collaborate with product teams to implement reliable backend solutions.

Design, build, and maintain server-side applications, databases, and APIs; optimize performance and scalability; implement security measures; collaborate with frontend and product teams; troubleshoot and debug; stay current with emerging backend technologies.

Design, build, and maintain server-side application logic, databases, and APIs. Optimize performance and scalability, implement security measures, debug issues, and collaborate with frontend and product teams to deliver reliable backend systems.

Lead architecture and implementation of scalable, distributed full-stack platform features. Own feature areas, integrate partners, design multi-tenant systems, and operate production services using React/TypeScript and NodeJS with Postgres/MongoDB and Kubernetes. Collaborate with cross-functional teams and work onsite at least three days weekly.

The Backend Engineer will own the backend system, deliver RESTful APIs, enhance user experience, and work with front-end developers in a dynamic startup environment.

Design and build scalable backend services in Node.js/TypeScript, architect database systems, implement real-time communication, and manage infrastructure for rapid growth.

Build and maintain the data platform powering the product: real-time API integrations, Kafka streaming, Spark and Airflow pipelines, and data services. Translate product requirements into scalable, reliable back-end systems, make technical tradeoffs, and operate production-facing services for an early-stage security company.

The Staff Backend Engineer will design high-performance infrastructure, optimize large-scale systems, and lead initiatives, collaborating closely with the CTO and the engineering team.