Top Senior Software Engineer Jobs in San Francisco Bay Area, CA

Design, implement, maintain, test, monitor, and debug Cloudflare’s distributed Load Balancing systems. Collaborate with security, network engineering, SRE, and product teams to build scalable, fault-tolerant solutions. Participate throughout the software development lifecycle, review code, mentor teammates, support production operations, and improve system reliability using Go, Rust, TypeScript, databases, containers, and orchestration technologies.

Develop and ship high-performance iOS applications and camera experiences for Snapchat. Responsibilities include designing and implementing tested Objective-C software, launching features, evaluating technical tradeoffs, collaborating with Design, conducting code reviews, and using AI tools while maintaining strong standards for correctness, security, performance, and scalability.

Develop and launch scalable Android features from design through implementation, creating smooth and stable user experiences. Evaluate technical tradeoffs, collaborate with design, conduct code reviews, and maintain high standards for correctness, security, performance, and production readiness. Use Kotlin, Java, RxJava, Dagger, and AI-assisted development tools. The role requires substantial software development experience and Android application expertise.

Own and architect large-scale backend systems powering Anthropic’s API, Claude products, and enterprise platforms. Lead complex projects, make scalability and reliability decisions, collaborate across engineering, product, research, and commercial teams, and remain hands-on with code and AI models. Potential areas include platform serving, developer experience, agentic systems, identity, enterprise foundations, safety, and cloud-native distribution.

Build and maintain scalable full-stack web applications and systems for Snap products. Develop user interfaces, optimize performance and browser rendering, contribute to shared libraries, analyze operational metrics, and deliver secure, production-ready code. The role requires strong front-end and back-end development skills, testing knowledge, distributed systems experience, and the ability to use AI tools responsibly in engineering workflows.

Build and improve Cloudflare Workers Runtime features that execute customer code at the edge. Responsibilities include optimizing performance, reliability, and scalability; expanding JavaScript and WebAssembly support; shaping technically feasible features; owning production code; and debugging large-scale distributed systems. The role requires strong computer science fundamentals, C++ or Rust experience, web knowledge, and Linux-based systems expertise.

Staff Software Engineer responsible for technical strategy, scalable full-stack systems, team operations, reliability, monitoring, code quality, and talent development. The role involves building customer-facing card experiences and backend services using Python or Kotlin, AWS, MySQL, Spark, Kubernetes, and React-based frameworks. The engineer will own features end to end, collaborate cross-functionally, manage technical risks and trade-offs, support on-call health, and apply AI safely to improve development and customer experiences.

Design, implement, operate, and scale critical backend services such as identity, social graph, and persistence systems. Collaborate across teams to deliver product solutions, test and debug code, and apply best practices for availability, scalability, security, operational excellence, and cost management. Independently deliver medium-sized features, support incident resolution, and use AI tools responsibly to improve development workflows while maintaining production-quality standards.

Build and scale mission-critical tips, earnings, and payroll platforms for restaurant employees. Own systems end to end, lead complex projects from design through deployment, improve reliability and correctness, collaborate with product and design, review code, mentor engineers, and deliver scalable backend services that affect employee pay and product revenue.

Own the architecture, roadmap, and production operation of GridCARE’s AWS-based data platform. Design ingestion, data models, storage, compute, APIs, distributed processing, governance, observability, and reliable serving layers for energy data. Build and operate AI coding agent teams, establish platform standards, mentor engineers, and partner with product and domain experts. The role requires hands-on backend, distributed systems, data infrastructure, ETL/ELT, AWS, and technical leadership experience.

Build and ship web-based transportation management software for trucking customers. Collaborate with product, UX, engineers, and users to solve domain-specific problems, deliver features quickly, make sound quality-versus-velocity tradeoffs, and contribute across the engineering team in a remote-first environment.

Own backend systems for a consumer application, building customer-facing features and solving data-focused problems such as user pairing and fraud prevention. Improve engineering workflows, testing tools, deployment automation, and release velocity. Independently lead projects from concept to completion while increasing backend ownership within a fast-growing company.

Lead full-stack software features from discovery through deployment and refinement. Build machine-learning workflows with human review, user interfaces for operations and analytics, APIs, databases, server-side logic, and browser applications. Engage directly with business clients to define requirements, make product tradeoffs, launch new product areas, and support rollouts. The role requires startup experience, production LLM feature delivery, and a hybrid schedule with four days per week in the San Francisco office.

Lead large-scale initiatives for a high-performance Linux-based network sensor, improving ingestion, scalability, continuous capture, queue reliability, observability, and production diagnostics. Own root cause analysis and postmortems, establish engineering standards, translate business goals into technical plans, and mentor engineers through design and code reviews. The role requires deep Rust expertise, distributed systems experience, concurrent programming, packet capture, message brokers, and cybersecurity best practices.

Own and build core backend services and infrastructure for sandboxed workloads, gateways, and task orchestration. Design production systems from zero to one, scale services, ship customer-facing features quickly, and make autonomous technical decisions. The engineer will gradually assume backend ownership from a senior engineer while collaborating closely with customers and the team.

Build and improve developer experience across large monorepos by leading framework and language migrations, dependency updates, build and CI improvements, automated refactoring, and agentic engineering workflows. The role identifies developer friction, creates safe automation and guardrails, partners with product engineering teams, measures impact, sets technical direction, and mentors engineers on tooling and codebase health.

Leads enterprise connector activation for Claude, including onboarding funnels, experimentation, authorization flows, platform APIs, governance controls, and enterprise administration. Builds reusable ecosystem foundations, improves Microsoft 365 and Google Workspace integrations, uses data and customer feedback to prioritize work, and sets technical direction while mentoring engineers and influencing cross-functional teams.

Build and operate software platforms for infrastructure cost attribution, usage metering, budgeting, forecasting, capacity planning, and efficiency. Develop dependable data pipelines, shared models, APIs, reporting tools, and automated controls connecting infrastructure consumption to costs and ownership. Lead technical direction, collaborate across engineering and finance, improve resource utilization, ensure system correctness and scalability, and mentor engineers.

Build and operate cloud networking and traffic infrastructure across clusters, regions, and clouds. Develop gateways, proxies, controllers, routing automation, load balancing, telemetry, and connectivity systems. Diagnose failures and performance issues across networking layers, improve reliability and efficiency, implement security controls, and partner with infrastructure, security, service, and cloud-provider teams. The role includes production ownership, safe rollouts, on-call participation, and turning operational lessons into durable improvements.

Develop and manage fraud-control platforms that reduce financial and regulatory risk while preserving user experience. Investigate and mitigate emerging risk patterns, resolve production issues across services and technology layers, and build modular fraud systems. Collaborate with engineering, product, policy, legal, operations, and data science stakeholders to translate business needs into software requirements, system designs, and roadmap priorities.

Architect and build an end-to-end ground software system for aircraft telemetry and command operations. Responsibilities include ingesting radio-link data, real-time processing, time-series storage, backend APIs, Mission Control visualization, aircraft health monitoring, and command tools. The role emphasizes approximately one-second latency, fault tolerance, high reliability, cloud systems, and cross-functional interface development with flight software teams.

Design, develop, operate, and optimize highly available distributed systems across large-scale cloud environments. Build infrastructure automation, microservices, and Infrastructure-as-Code using Terraform and container platforms. Apply AI development tools and advanced prompt engineering to produce secure, reliable software. Contribute to open source, evaluate code, resolve complex production issues, manage technical debt, and participate in on-call rotations.

Build and evolve ngrok’s AI Gateway, including real-time AI traffic handling, policy enforcement, rate limits, usage caps, access rules, token tracking, observability, and explainability. Design customer-focused gateway abstractions and collaborate with Gateway, Customer Data, Platform, product, and design teams to align enforcement, usage, and billing signals. The role involves full-stack development using primarily Go and TypeScript in a production AWS, Kubernetes, and distributed-systems environment.

Build and operate scalable Ruby on Rails APIs and React interfaces for data activation. Responsibilities include API design, performance and reliability improvements, automated testing, production troubleshooting, documentation, architecture discussions, incident response, and cross-functional collaboration. The role requires secure, maintainable software development and responsible use of AI-assisted tools, with opportunities to establish API standards and mentor engineers.

Build and own high-volume backend services for automated jobs, including scheduling, queues, retries, and third-party integrations. Design scalable infrastructure, maintain data integrity and uptime, manage production performance, and deliver features from scoping through deployment. The role involves shaping platform architecture, handling heavy traffic, and collaborating closely with the technical lead. Candidates need startup experience, large-scale background processing expertise, Effect or functional TypeScript experience, and the ability to work hybrid in San Francisco.