Senior Full-Stack Engineer

Description Alice's RL Environments team builds adversarial environments that the world's leading AI labs use to test and train their most capable agents. Each environment is a working replica of a real system with an attack planted inside it. A verifier decides whether the agent held up. All of it runs on AgenticVerse, our platform for building, running, and reviewing RL environments. AgenticVerse is a full-fledged, production-grade SaaS application. A large and fast-growing community of researchers works in it every day. We're looking for a Senior Full-Stack Engineer to own AgenticVerse as a product, and to build the digital twins our environments are made of. What you'll do AgenticVerse • Own the AgenticVerse application end to end: frontend, backend, data model, and APIs • Build the workflows researchers live in: authoring tasks, launching runs, managing gyms, and reviewing results • Make a run readable at a glance: traces, verifier results, and where the agent went wrong • Hold a production bar: performance, reliability, access control, and observability as the user base grows • Take features from design to production, and talk to the researchers who use them Digital twins • Build digital twins of real products: web apps an agent can't tell apart from the real thing • Build the full stack behind each one: the UI, a real API backend, and the state that persists across a run • Expose every action the agent takes as an event the verifier can grade Requirements What we're looking for • 6+ years as a full-stack engineer, building production SaaS • BSc in Computer Science or a related field, preferably from a leading university • Strong TypeScript and React, and a backend language (Python preferred) • Experience designing APIs and data models for multi-user applications • Production experience with Docker and cloud infrastructure (AWS preferred) • High autonomy in an undefined space. You take a loose problem and come back with working code • Fluent written and spoken English Advantage • Hands-on AI engineering: building with LLMs, agents, or evaluations • Experience building developer tools or internal platforms • Experience with Kubernetes • Background in security, red teaming, or trust and safety About Alice Alice is a trust, safety, and security company built for the AI era. We safeguard the communicative technologies people use to create, collaborate, and interact- whether with each other or with machines. In a world where AI has fundamentally changed the nature of risk, Alice provides end-to-end coverage across the entire AI lifecycle. We support frontier model labs, enterprises, and UGC platforms with a comprehensive suite of solutions: from model hardening evaluations and pre-deployment red-teaming to runtime guardrails and ongoing drift detection. Alice is widely considered a global leader in online safety and AI security. We have some of the most forward-thinking and passionate minds in the world working to safeguard over 3 billion users across the largest AI and tech platforms. If you're creative and driven to secure the future of AI, we want to hear from you!