Principal AI/ML Engineer (Decision Automation)

Location: Stockholm, Barcelona, or London

Company

hirify.global is a mobile interactive entertainment company behind the Candy Crush franchise and other games, serving around 200 million players each month.

What you will do

• Define and lead shared AI/ML and automated decisioning architecture across Candy Crush Saga.
• Build production systems through coding, prototyping, implementation, and technical design reviews.
• Develop reusable foundations for insight generation, experimentation, personalization, and adaptation at scale.
• Set standards for reliability, observability, maintainability, and production quality.
• Influence technical direction across product, analytics, engineering, game, and platform teams.
• Mentor senior engineers and align teams around scalable technical solutions.

Requirements

• Deep experience building and shipping production AI/ML systems with measurable business impact.
• Strong applied expertise in personalization, causal inference, and operational AI/ML guardrails.
• Experience defining shared technical patterns, standards, or architecture in complex environments.
• Ability to lead senior technical discussions and influence direction across teams.
• Strong communication, collaboration, mentoring, and cross-functional product judgment.

Nice to have

• Experience with large-scale experimentation platforms, personalization systems, or decisioning infrastructure.
• Familiarity with game technology, player-facing optimization, or content adaptation systems.
• Experience consolidating fragmented or bespoke ML workflows into shared technical foundations.

Culture & Benefits

• Work in a cross-functional AI/ML team supporting a global-scale mobile game.
• Collaborate with product, analytics, engineering, game, and central platform partners.
• Contribute to systems influencing player-facing decisions for hundreds of millions of players.
• Join hirify.global, part of Microsoft, with offices across Europe and North America.