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

Develop and maintain Crunchyroll’s iOS and Apple TV applications using Swift and SwiftUI. Implement features, coordinate technical designs and cross-team dependencies, conduct code reviews, improve automated testing and code coverage, and optimize performance for memory-constrained, multithreaded devices. Collaborate with product and engineering teams while supporting scalable Apple platform solutions. The role is hybrid in San Francisco.

Build and launch complex backend projects, design scalable architectures, lead code reviews, resolve high-risk issues, and contribute to company-wide engineering initiatives. The role involves Java development, distributed systems, cloud platforms, databases, performance optimization, mentoring engineers, and influencing technical decisions across teams.

Lead technical direction and implementation of large-scale product features, delivering secure, reliable, maintainable full-stack software. Collaborate with product, design, and engineering teams, address production issues, conduct code reviews, document solutions, and mentor teammates. Build and test front-end and server-side systems using modern frameworks, APIs, databases, and data-driven development practices.

Build and launch scalable software, APIs, and tooling for Adyen’s payments platform. Own projects from requirements through production, improve platform robustness and performance, and collaborate across teams and time zones. The role requires hands-on Java development, REST APIs, webhooks, SQL/PostgreSQL, and experience with complex distributed systems.

Design and evolve shared backend infrastructure, including APIs, realtime transport, storage frameworks, background job systems, workflow orchestration, and internal tooling. Improve reliability, performance, observability, and security while partnering with product teams on reusable abstractions. Lead technical design discussions, drive migrations and refactors, mentor engineers, and help establish backend architecture and engineering standards.

Build backend-leaning product features for Hex’s AI analytics platform, including APIs, CLI workflows, MCP integrations, access-control systems, enterprise administration, and full-stack product changes. Design scalable systems, implement complex business logic, collaborate through RFCs and code reviews, and contribute across the application stack. The role uses TypeScript, GraphQL, Postgres, Redis, Kubernetes, AWS, and related infrastructure 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.

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.

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.

Lead the design and development of ETL solutions for regulatory risk compliance at PNC, requiring advanced programming skills and collaboration on data-intensive applications.

Design, build, and operate Vercel’s Workflows, Queues, and Cron platform capabilities. Develop APIs, SDKs, and tooling for durable, event-driven, and scheduled workloads. Solve distributed-systems challenges involving message delivery, retries, execution, state, concurrency, and fault tolerance. Collaborate with product, infrastructure, and developer experience teams, engage with developers and open-source communities, and maintain high standards for tested code, technical communication, and production ownership.

Lead technical execution, architecture, roadmap, and delivery for the Loyalty product. Manage and grow engineering teams, drive design and operational excellence, ensure reliability/observability, coordinate cross-team integrations, and deliver scalable multi-tenant SaaS features integrated with Zeta’s platform and AI capabilities.

Design, deploy, and optimize Philo’s distributed video streaming infrastructure, including ingest, transcoding, packaging, delivery, RESTful services, analytics pipelines, DRM, and ad insertion. Improve platform reliability, performance, latency, security, video quality, and cost efficiency. Collaborate with content partners and internal video, advertising, client, and data teams while supporting streaming quality across new platforms. The role also involves architectural ownership, cloud operations, and mentoring.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve reliability, performance, observability, fault tolerance, and security, and participate in on-call and incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews and documentation.

Design, build, scale, and operate high-volume payment APIs and distributed systems serving global traffic. Lead complex engineering projects from requirements through production, improve performance, observability, reliability, fault tolerance, and security, and participate in on-call incident response. Collaborate across product and engineering teams, use AI-assisted development tools responsibly, and mentor engineers through technical reviews, documentation, and guidance.

Lead full stack development for BlackRock’s Arya fintech platform, building React and TypeScript interfaces, Python microservices, relational database structures, and Kubernetes deployments. Own features end to end, modernize enterprise technologies, collaborate with users and project teams, lead initiatives, mentor junior engineers, contribute to recruitment, and support agile software development.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

As a Senior or Staff Deployed Software Engineer, you will design and build software solutions, collaborate with teams, and drive technical strategy while engaging with customers to solve complex problems.

Own and expand Gusto’s third-party integrations, building reliable Ruby on Rails and Sidekiq backend services that synchronize data with partner platforms. Evaluate traditional APIs and AI agent protocols such as MCP, shape the technical roadmap, collaborate with Product, Design, and Data Science, establish engineering practices, review code, and mentor engineers. The role requires end-to-end project ownership in an ambiguous, evolving domain.

Design, build, and own scalable microservices and secure APIs that transfer value across blockchain and banking protocols. Extend in-house blockchain infrastructure, integrate with banks and cloud services, troubleshoot production issues, document system and testing procedures, and collaborate with product and engineering teams to deliver reliable payment experiences.

Architect and build a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional engineering teams on large-scale initiatives, emphasizing scalability, performance, API quality, maintainability, developer experience, and end-user usability.

Own and improve the software platform for autonomous underwater robots: deploy and update fleet software, build remote monitoring and high-bandwidth comms, expand simulation and testing, create operator/customer tooling, and execute field testing with international travel.

Owner of core clinical backend systems: design and build TypeScript/Nest.js APIs, model clinical domains in PostgreSQL/Prisma, implement onboarding/migration flows, ensure CI/CD, monitoring, HIPAA/SOC2 readiness, collaborate with clinical stakeholders, and build monitoring/reporting with Sentry/Datadog on AWS.

Join as an early founding full-stack engineer to architect, build, and deploy a scalable platform serving AI-driven voice applications. You will own frontend and backend development, design infrastructure with the CTO, and deliver reliable production systems for enterprise customers.