Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

Design, develop, test, and deploy secure smart contracts and DApps on platforms like Ethereum and Solana. Manage digital asset lifecycle (issuance, settlement, custody), integrate blockchain components with front-end/back-end using Web3 libraries, perform security audits, and optimize performance and scalability.

Build and maintain automated test suites and perform manual testing to ensure product quality. Train squads on test management, improve test coverage, troubleshoot data issues, and promote strong quality practices within Agile teams.

Benchmark and optimize latency and throughput for an agentic AI platform. Stress-test multi-agent concurrency, RAG/vector DB retrieval, token throughput, orchestration hand-offs, and integrate automated performance regression tests into CI/CD while balancing cost versus performance.

Design, develop, and maintain automated UI, API, and end-to-end tests using Cypress and Robot Framework. Integrate tests into CI/CD, manage test data, perform code reviews, report defects in Jira, and collaborate with dev and QA teams to improve test coverage and QE practices.

Build and maintain Java/Spring Boot backend microservices for a Notification Hub: routing, preference sync, webhook ingestion, Pub/Sub consumers, Avro schema processing, vendor and internal API integrations, resilience patterns, and operational troubleshooting.

Build and maintain high-performance iOS mobile applications using React Native. Collaborate with designers, product, and backend teams to implement features, integrate RESTful APIs, optimize performance, debug issues, write clean code, participate in code reviews, and keep up with mobile development best practices.

Lead data strategy, architecture, and governance. Design and oversee data lakes, warehouses, and ETL/ELT pipelines. Support analytics, ensure data quality/security/compliance, evaluate data technologies, and mentor a team of engineers, analysts, and scientists.

Build and maintain responsive, accessible, high-performance frontend applications using modern frameworks. Contribute to greenfield and legacy modernization, follow code quality best practices, leverage AI-assisted tools and LLM prompting, collaborate with product, design, and backend teams, and ensure reusable components, cross-browser compatibility, and performance optimization.

Lead large, complex projects from initiation through closure. Develop project charters and plans, manage budgets and resources, identify and mitigate risks, enforce quality standards, mentor team members, communicate with executives and stakeholders, and ensure on-time, on-budget delivery with documented lessons learned.

Build and maintain cross-platform mobile apps using React Native. Convert UI/UX designs to responsive interfaces, create reusable components and design systems, integrate REST/GraphQL APIs, handle authentication and WebView integration, write unit and E2E tests, optimize performance, participate in code reviews, and support App Store and Play Store releases.