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

Leads end-to-end development of high-scale Yahoo Mail web features, from architecture and implementation through deployment, monitoring, and maintenance. Uses AI-assisted development tools while validating code for security, performance, accessibility, and correctness. Collaborates with product and UX teams, conducts code reviews, mentors engineers, and improves software lifecycle efficiency through automated workflows.

Own end-to-end technical success for enterprise data partners, from sandbox onboarding through production optimization. Serve as the primary technical contact, maintain API reliability and SLA compliance, monitor integrations, troubleshoot distributed and asynchronous systems, translate partner needs into technical specifications, and collaborate with engineering teams to improve APIs, streaming pipelines, and data contracts. Create documentation, playbooks, architecture diagrams, and escalation processes while communicating effectively with technical and executive stakeholders.

Lead design of top-of-funnel discovery and acquisition surfaces for Yahoo Games across desktop and mobile web. Create delightful, data-driven entry points that move users from awareness to play, prototyping in Figma and AI-assisted tools, partnering with product, engineering, marketing, and analytics, and evolving design systems to scale experiences.

Design social and editorial content for Instagram, TikTok and emerging platforms; create carousels, explainers, motion graphics, interactive experiences and map-based storytelling using tools like Ceros and Mapbox; develop visual identity, scalable templates, AI-assisted workflows, and collaborate with social and editorial teams to prototype and optimize audience engagement.

As a Principal Product Engineer, you'll design and implement AI-driven frontend solutions, tackle engineering challenges, and lead technical guidance in a collaborative environment.

Lead strategy and execution for Yahoo Mail client platforms and shared services across web, iOS, Android and emerging surfaces. Own platform vision, roadmaps, and cross-team initiatives for authentication, identity, privacy, security, and client frameworks. Drive platform transitions, stakeholder alignment, and metrics for performance, reliability, cost, and developer productivity.

Build AI-native, employee-facing security products (agents, skills, plugins), own AI tooling infrastructure, advocate for developer experience, integrate APIs/MCPs, validate AI outputs, and produce clear documentation and lightweight UIs for broad internal audiences.

The Senior Software Engineer will architect and optimize AI-powered developer tools, enhance the SDLC, collaborate across teams, and mentor peers to improve engineering productivity.

Lead research and algorithm design for large-scale ranking, personalization, recommendation, ads targeting, causal uplift, dynamic pricing, and revenue forecasting. Design, train, evaluate, and productionize state-of-the-art ML, deep learning, and RL models (including transformer/LLM hybrids) on cloud platforms, establish experimental standards, and mentor research engineers.

The role involves designing and developing enterprise-grade software solutions, integrating AI tools, collaborating with teams, and maintaining documentation while enhancing productivity for Yahoo personnel.