Senior Software Engineer Gandalf

Work set-up: 
Full Remote
Contract: 
Experience: 
Senior (5-10 years)
Work from: 

Offer summary

Qualifications:

Strong frontend skills with React and TypeScript., Solid backend engineering experience, e.g., Python, Next.js, Firebase., Experience in zero-to-one product environments with ownership., Passion for games, user experience, and AI..

Key responsibilities:

  • Own end-to-end product development of Gandalf, including gameplay, frontend, and backend.
  • Partner with researchers and product leads to prototype, test, and launch new features.
  • Shape and implement user experience details like animations and performance.
  • Drive product impact by testing, validating, and improving AI models through the game.

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Lakera https://lakera.ai
11 - 50 Employees
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Job description

Senior Software Engineer – Gandalf

Lakera 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. Its become a proving ground for adversarial testing of LLMs and a cornerstone of how the world learns about AI safety.

Were now looking for a ProductFocused 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 cuttingedge AI building immersive, secure, and delightful experiences that people actually love.

What you’ll do
  • Own the endtoend 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 realtime competition, player profiles, ingame progress, and more.

  • Help define the roadmap, not just execute it — your product sense matters here.

  • Drive massive product impact: Gandalf isnt just about building great games, its 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 you
      • Have strong frontend skills (React, TypeScript) and solid backend engineering chops (e.g., Python, Next.js, Firebase, or similar).

      • Thrive in zerotoone 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.

Required profile

Experience

Level of experience: Senior (5-10 years)
Spoken language(s):
English
Check out the description to know which languages are mandatory.

Other Skills

  • Collaboration
  • Problem Solving

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