As a Senior Full Stack Engineer , you'll help define and build the core foundation of our product. You'll work across the stack, own key features end-to-end , and collaborate closely with founders, customers, and tech leads to shape the future of GenAI securityYour Experience &Skills4–8+ years of experience in core software engineeringExperience building front end components in modern frameworks such as React, Next.js, and similarExperience designing scalable systems, APIs, and data architectureExperience shipping production software in a product-focused environmentAbility to work through ambiguity and solve complex technical problemsDesirable) Experience working with GenAI or ML in a professional, personal, or academic settingDesirable) Familiarity with TypeScript and the Node.js ecosystemMindset &FitCollaborative - thrives in a fast-paced startup environmentStrong opinions, loosely held - willing to debate, iterate, and adjustBias for action - prioritizes, ships fast, and avoids over-engineeringPassionate about AI and cybersecurityDesire to have impact on all aspects of the company's successWhy Join Us?Early impact : Help shape a category-defining product in GenAI securityGrowth & ownership : Work directly with founders and tech leads to drive innovationCutting-edge tech : Build with LLMs, AI security, and enterprise AI adoption strategiesAbout OpsinOpsin is a venture-backed GenAI security company, funded by top-tier investors including Race Capital . We empower enterprises to safely adopt GenAI solutions like Microsoft Copilot, Google Gemini, and other LLM-powered agents by monitoring and securing enterprise data access . Our platform ensures employees can leverage AI without exposing sensitive or over-permissioned information.Employment TypeFull-TimeCompensationCompetitive salary, benefits, and equityLocationSan Jose, CA / SF Bay Area (hybrid). The team works together in person 2–3 days a week at our locations in downtown San Jose and San Ramon. In-person collaboration is key for this position.Excited to secure the future of GenAI? Join us!J-18808-LjbffrCreate a job alert for this searchSenior Stack Engineer • San Jose, CA, US #J-18808-Ljbffr