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

Senior full‑stack engineer responsible for building and maintaining front-end and back-end systems, collaborating with product and design, ensuring UI/UX feasibility, performance and security, troubleshooting and upgrading software, participating in code reviews, maintaining documentation, and managing hosting, databases, and scalability.

Design and build user-facing web interfaces from mockups using HTML, CSS, and JavaScript. Implement interactive features, ensure responsive and accessible cross-browser experiences, optimize performance, test and debug code, maintain existing applications, and collaborate with back-end developers for integration.

Design, build, and maintain server-side applications, databases, and APIs; optimize performance and scalability; implement security measures; collaborate with frontend and product teams; troubleshoot and debug; stay current with emerging backend technologies.

Bridge product vision and technical implementation by developing features, troubleshooting, testing, and collaborating with product, design, and engineering teams. Contribute to product strategy, roadmaps, and continuous improvement, potentially involving ML, data pipelines, and cloud infrastructure.

Design, implement, and optimize machine learning and deep learning models; preprocess and analyze large datasets; integrate models into production; monitor and maintain model performance; collaborate with engineers and stakeholders; stay current with ML/AI advances.

Design and run experiments to evaluate LLM behavior across reasoning, style, robustness, and user preferences. Develop new metrics and evaluation protocols, analyze large-scale human voting/interaction data, prototype research ideas, collaborate with engineers to productionize findings, and publish internal and external research.