Principal AI/ML Engineer

Company: King Digital Entertainment
Apply for the Principal AI/ML Engineer
Location: London
Job Description:

Overview

In this hands-on senior role, you will shape the shared AI/ML and decisioning foundations that power Candy Crush Saga at scale. You will influence architecture, prototype important paths, and ensure reliable, production-grade systems that enable faster experimentation and coherent player experiences. You’ll lead cross-team collaboration to unify fragmented approaches into reusable capabilities. This opportunity combines technical leadership with hands-on coding to drive scalable, player-centric decisions.

Responsibilities

  • Define and drive AI/ML and decisioning direction across Candy Crush Saga through credible, clear execution
  • Contribute hands-on through production coding, prototyping, and critical-path implementations
  • Set high standards for production AI/ML engineering: reliability, observability, maintainability, and quality
  • Mentor senior engineers and elevate cross-team design and judgment
  • Lead shared AI/ML and automated decisioning architecture used across multiple game components
  • Unify fragmented approaches into reusable foundations to improve consistency, speed, and scalability
  • Collaborate with product and game teams to convert opportunities into reusable capabilities

Key requirements

  • Deep experience shipping production AI/ML systems with tangible business impact
  • Strong applied expertise in personalization and causal inference
  • Track record of aligning AI/ML methods with production guardrails and operations
  • Proven ability to influence technical direction across teams
  • Experience defining shared patterns, standards, or architecture in complex environments
  • Ability to lead senior-level technical discussions with substance and precision
  • Excellent communication to explain complex ideas to technical and non-technical audiences
  • Proven ability to align cross-functional teams around a shared technical direction
  • Mentoring capability with senior engineers and technical leaders
  • Comfort presenting technical work in high-visibility forums
  • Cross-functional collaboration
  • Strategic influencing
  • Mentoring and leadership
  • Production AI/ML systems
  • Personalization
  • Causal inference

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Posted: October 16th, 2026