Top Senior Backend Engineer Jobs in San Francisco, CA

Build reusable backend platforms and developer-facing tooling for performance testing, analysis, reporting, and AI-assisted engineering workflows. Enable service teams to independently incorporate performance testing into development and CI workflows through self-service capabilities, documentation, templates, diagnostics, and guidance. Partner with engineering teams, influence adoption, generalize solutions, and provide expertise on complex performance challenges.

Design and implement backend services, modernize legacy systems into microservices, ensure strong testing and production observability, and collaborate with Product and Engineering teams. The role requires independent project ownership, strong system design, AI-assisted development using tools such as Claude or Cursor, effective communication with nontechnical stakeholders, and adaptability in an ambiguous, fast-changing environment.

Design, implement, and maintain scalable, secure, high-performance backend systems and public-facing APIs. Collaborate with Product and Data Science teams, lead initiatives improving efficiency and system performance, and support customer satisfaction. Work may involve distributed systems, pricing engines, identity management, authentication, authorization, API versioning, deprecation, and rate limiting.

Design, build, and scale backend services and integrations for payment, billing, identity, and partner systems. Own API scoping, design, implementation, deployment, and production operations with minimal oversight. Build fault-tolerant systems, data pipelines, and scalable architectures while collaborating with product, design, engineering, and external partners. Contribute to reliability monitoring, observability, automation, technical standards, and mentoring in a distributed team.

Build and scale backend data platforms and services for real-time loan origination and financial reporting. Lead quarterly delivery, guide engineers, define technical plans, collaborate with product and design partners, improve reliability and operational practices, monitor service metrics, participate in on-call support, uphold engineering quality standards, and mentor team members. The role requires developing highly available distributed systems and scalable data pipelines using technologies such as Python, Kotlin, AWS, MySQL, Kubernetes, Spark, and Airflow.

Design, develop, launch, and maintain scalable backend systems and APIs used by merchant and partner integrations. Collaborate with engineers and stakeholders, balance speed with system quality, debug code, conduct code reviews, and write tested, extensible software. The role requires experience with distributed systems, Python or Kotlin, AWS, MySQL, and Kubernetes, along with strong communication and ownership of professional growth.

Design, build, and operate scalable Python backend services, APIs, event-driven systems, integrations, and data pipelines supporting manufacturing and operations. Partner with hardware, manufacturing, quality, and operations teams to deliver reliable production systems. Lead technical design, mentor engineers, establish engineering patterns, and contribute to deployment, monitoring, observability, and continuous improvement across globally distributed teams.

The role involves designing and developing high-performance web apps, improving user interfaces, maintaining component libraries, and ensuring code quality through comprehensive testing and collaboration with other teams.

Design, build, and operate backend services for Bestow’s insurance platform using Python, Go, Java, and PostgreSQL. Collaborate on technical decisions, integrations, carrier onboarding, and scalable platform capabilities. Mentor engineers through reviews and pairing, improve production reliability and observability, participate in on-call support, and communicate technical decisions in a remote-first environment. Use agentic AI coding tools daily and help establish effective AI-assisted development practices.

Nourish seeks a Senior Backend Engineer to design, build, and maintain backend services, collaborate with teams, and enhance engineering processes. Responsibilities include product development, codebase management, and driving improvements for scalability.

Owns delivery of backend money movement and card ledger systems, leading engineers through complex problems and ambiguity. Collaborates with product, design, analytics, and engineering stakeholders; defines scalable technical solutions; supports system availability, monitoring, on-call operations, code quality, and engineering standards. The role also includes mentoring and developing team talent while building highly available distributed systems for Affirm’s financial products.

Leads architecture and hands-on development of scalable backend systems and APIs supporting real-time applications. Owns the engineering lifecycle, writes high-performance code, establishes testing and reliability practices, resolves production issues, guides technical roadmaps, collaborates cross-functionally, and mentors engineers. The role requires expertise in object-oriented backend development, distributed cloud systems, automated testing, system monitoring, and technical leadership.

Design and build distributed backend systems for Salesforce’s agentic product setup platform. Develop a reusable agent framework, composable skill APIs, evaluation infrastructure, retrieval capabilities, and production-grade software. Establish system context and engineering standards while evaluating code for security, correctness, quality, and performance. Collaborate on AI agent, LLM, semantic search, and structured data solutions.

Build and operate backend services, control planes, and automation for Lightning AI’s managed Kubernetes and Slurm infrastructure. Develop distributed systems for cluster provisioning, lifecycle management, scheduling, observability, reliability, and scalability across large-scale GPU environments. Diagnose complex production issues and collaborate with infrastructure, AI, and platform engineering teams. Contribute to architecture, technical design, mentoring, engineering practices, and on-call operations.

Build and scale high-throughput backend services and APIs for AI agent observability, metrics, token usage, runtime controls, and resilience. Develop primarily in Python with Go, write automated tests, and work with databases, Kafka or similar streaming systems, and data platforms. Collaborate with frontend engineers, AI researchers, product managers, and engineering teams to deliver reliable, scalable enterprise products.

Leads backend architecture and technical strategy for autonomous vehicle and customer support systems. Designs scalable integrations across Fleet, Uber for Business, Direct, and platform teams; develops proactive trip-lifecycle support, Agentic AI capabilities, reliability, and end-to-end testing frameworks. Drives cross-functional technical alignment and mentors senior engineers toward Staff-level impact.

Architect and build highly reliable, scalable backend systems powering Uber One memberships across UberEats and UberX. The role involves platform evolution, microservices and API design, technical strategy, cross-functional collaboration, architectural decision-making, production deployment, monitoring, incident management, and engineering excellence. The engineer will lead complex technical initiatives and develop systems serving millions of global users.

Design and operate highly available, high-throughput backend services and distributed systems for Uber’s shared Core Services platform. Shape multi-year technical roadmaps, architectural standards, and foundational infrastructure. Lead development of concurrent microservices, observability, load testing, zero-downtime deployments, and resilient multi-region systems. Collaborate across product and engineering teams while mentoring engineers and driving organization-wide engineering excellence.

Designs, builds, and operates API gateways and integration layers connecting internal services and external systems. Owns authentication, authorization, service delegation, caching, webhooks, notification delivery, testing, observability, and production reliability. Establishes technical direction through architecture, documentation, code reviews, incident follow-up, and mentoring. Resolves complex integration problems and develops reusable engineering patterns for secure, scalable platform operations.

Develop and launch scalable, customer-facing backend products for Brex’s financial platform. Responsibilities include collaborating across engineering and user-facing teams, designing banking solutions, owning user experience and data models, improving scalability and operability, monitoring metrics, and maintaining high-quality standards. The role requires backend development experience, database expertise, strong communication, and end-to-end product ownership.

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.

Build and own backend systems for fantasy sports, including leagues, rosters, drafts, waivers, trades, matchups, and scoring. Scale real-time stat ingestion and low-latency delivery to millions of users. Ship features end to end with product, design, mobile, and web teams. Maintain production health through monitoring, profiling, and capacity planning. Staff engineers additionally own architecture, conduct reviews, and mentor engineers.

Build and own backend systems for Sleeper Picks, including contests, pricing, market data, settlement, wallets, ledgers, eligibility, and compliance. Develop reliable real-time systems handling high traffic, concurrent writes, financial correctness, reconciliation, and third-party integrations. Partner with risk, trading, design, and mobile/web teams to deliver end-to-end features. Staff engineers additionally own architecture, elevate engineering standards, and mentor peers.

Own and lead the technical direction of a major codebase section while designing, building, testing, documenting, and maintaining secure, scalable API-based decisioning products. Partner with product, engineering, and security teams on agile delivery, troubleshoot production issues, meet SLA requirements, and participate in an on-call rotation.

The Senior Software Engineer will design and implement backend services, manage architectural decisions, and drive improvements in data quality, performance, and reliability, while collaborating across teams to enhance client and provider interactions in mental healthcare.