Senior Software Engineer – Full Stack

We’re looking for a Senior Full Stack Engineer to own the product layer of our system. You’ll be responsible for the frontend experience and the API/application layer—working across the stack to deliver reliable, end-to-end product workflows. You’ll collaborate closely with backend/data engineers and SRE, shaping how systems come together at the product layer, and contributing wherever needed to ship features. You’ll play a key role in moving us from early deployments to a repeatable product across multiple facilities. This is a high-ownership role. You will define patterns, unblock teams, and help shape how the product works—not just how it’s implemented. We've found tremendous value in collaborative problem-solving, so our team works from our SF office three days a week. KEY RESPONSIBILITIES - Drive the development of our frontend (Next.js / TypeScript), leveraging modern code-generation agentsArchitect and oversee the API/application layer, focusing on system integration, security, and data integrity - Design robust end-to-end product workflows, acting as the primary reviewer and quality gatekeeper for automated code contributions - Implement strict automated testing and CI/CD pipelines to ensure reliability and safety of the features - Build and maintain: - Customer-facing UI for live operations and analytics - Internal tools for configuring and deploying facilities - Collaborate with product to translate high-level requirements into concrete workflows and implementations - Collaborate with backend engineers to define and evolve API contracts and data interactions - Improve performance, reliability, and maintainability of the frontend - Implement and maintain frontend and API testing and CI workflows - Own authentication flows and system integration at the product layer REQUIRED QUALIFICATIONS - Strong experience with TypeScript and React (Next.js or similar) - Experience building and maintaining API layers using backend frameworks (Python, Node, or similar) - 5+ years building and shipping production systems - Experience owning end-to-end features or products, not just isolated components - Comfortable working across the stack (frontend + API layer) - Strong ownership and product mindset, with the ability to operate in ambiguous, fast-moving environments PREFERRED QUALIFICATIONS - Experience building real-time or data-heavy applications (e.g., streaming, time-series, or analytics systems) - Experience working with authentication systems (e.g., login flows, session management, SSO integrations) - Experience working with systems deployed outside pure cloud environments (e.g., on-prem, edge, or hardware-integrated systems) HOW WE WORK WITH PRODUCT & DESIGN - You will often start from high-level product goals, not detailed specifications. You’re expected to help define: - workflows - user interactions - system behavior - You’ll collaborate with product and…