Top Backend Engineer Jobs in San Francisco, CA

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 build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

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.

Build and maintain agentic workflow components and the platform requirements knowledge base to ensure features ship across GitLabs deployment targets. Implement integration surfaces (issues, MRs, design docs, CI/CD), collaborate with platform teams to translate expertise into structured requirements, and write tests, documentation, and evaluations for agentic-workflow behavior and assessment accuracy.

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 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.

As a Backend Engineer, you'll improve Git and Gitaly by contributing features, bug fixes, and performance improvements, collaborating with the open source community, and participating in architectural discussions.

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.

Design, build, and operate core backend systems powering subscription billing, medication ordering and fulfillment, and partner integrations. Own schema design, business logic, AWS/Kubernetes infrastructure, CI/CD, and production observability. Collaborate with clinical, product, and operations teams to deliver compliant, reliable clinical state machines and AI-assisted workflows that automate operations and improve patient outcomes.

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.

Build and operate scalable, highly observable backend services and stream-processing pipelines (Kafka, Flink) to process telemetry from hundreds of thousands of IoT devices, powering geofencing, alerts, trip construction, and APIs. Collaborate with Embedded/IoT teams, own infrastructure on cloud (AWS/GCP/Azure), reduce technical debt, and mentor teammates.

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.

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.

Lead design and implementation of the payment and clearinghouse platforms powering Headway's revenue flows. Build fault-tolerant, observable integrations (Stripe, Plaid, payers), create abstractions for adjacent teams, mentor engineers, and write high-impact code to ensure reliability, throughput, and correct reconciliation of transactions at scale.

Design and build reliable backend services powering clinical data, insurance billing, patient-facing infrastructure, and financial ledger systems. Scale high-integrity systems requiring idempotency, strong consistency, and pragmatic AI integration to automate provider workflows and enable personalized patient experiences.

Design, implement, and operate large-scale backend services (identity, friend graph, persistence). Collaborate across teams to evaluate trade-offs, ensure availability, scalability, and security, participate in incidents, and use AI tools to accelerate development while maintaining code quality and operational excellence.

As a Founding Backend Engineer, you'll build frameworks for information exchange, blockchain verification, and customer processing using AI, while fostering early company culture.

The Backend Engineer for AI will develop AI-powered features, solving complex problems, collaborating with teams, and delivering impactful products.

Build and operate backend services for Loft's Oort platform, designing APIs and database interactions, integrating tools and data across teams, partnering with stakeholders to translate mission processes into reliable software, and iterating with a product mindset to reduce operational complexity.

As a Senior Backend Engineer, you'll design scalable systems, lead complex projects, and collaborate on APIs for AI-driven voice automation.

As a Backend Engineer, you will lead discussions, architect infrastructure, optimize performance, and establish best practices for backend systems.

Design, build, and scale core backend systems; manage services and APIs for engineering data streams, ensuring performance and compliance.