Senior Software Engineer - Gandalf @ Lakera

Senior Software Engineer – GandalfLakera is on a mission to secure the era of intelligent software. At the heart of this mission is Gandalf. the world’s most popular AI security game, played by millions globally. Gandalf isn’t just a viral success. It's become a proving ground for adversarial testing of LLMs and a cornerstone of how the world learns about AI safety.We're now looking for a Product-Focused Software Engineer to take Gandalf to the next level. This is a rare opportunity to own a beloved product with massive reach and shape its future. You’ll work at the intersection of gaming, UX, and cutting-edge AI building immersive, secure, and delightful experiences that people actually love.What you’ll doOwn the end-to-end product development of Gandalf. From gameplay mechanics, frontend and backend scalability.Partner with researchers and product leads to prototype, test, and launch new game modes and features.Shape and implement the user experience: animations, transitions, performance, and polish the details that turn a toy into magic.Make Gandalf more social, more replayable, and more extensible. Think real-time competition, player profiles, in-game progress, and more.Help define the roadmap, not just execute it — your product sense matters here.Drive massive product impact: Gandalf isn't just about building great games, it's a core surface through which we test, validate, and improve our models. The work you do here directly shapes model performance, product quality, and ultimately business outcomes.You might be a fit if youHave strong frontend skills (React, TypeScript) and solid backend engineering chops (e.g., Python, Next.js, Firebase, or similar).Thrive in zero-to-one product environments and want real ownership.Are passionate about games, user experience, and AI and love building things people can’t stop using.Think like a product builder: you care about outcomes, not just code quality.Can move fast independently but collaborate deeply across teams.Bonus points forExperience working on games,…

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