Senior Principal AI/ML Engineer (Gamedev)

TL;DR

Senior Principal AI/ML Engineer (Gamedev): Building shared decisioning foundations for Candy Crush Saga with an accent on causal inference, personalization, and automated decisioning systems. Focus on unifying fragmented ML workflows into scalable, production-grade architectures that enable faster experimentation and adaptation at scale.

Location: Hybrid (Stockholm, Barcelona, or London)

Company

hirify.global is a leading interactive entertainment company and creator of the iconic Candy Crush franchise, serving over 200 million monthly active users worldwide.

What you will do

• Lead the shared architecture for AI/ML and automated decisioning systems across Candy Crush Saga.
• Influence technical direction through hands-on production coding, prototyping, and design reviews.
• Unify fragmented AI/ML approaches into reusable, scalable technical foundations.
• Mentor senior engineers and elevate technical judgment and design quality across the team.
• Partner with product and game teams to transform high-value opportunities into reusable capabilities.
• Ensure high standards for production AI/ML, including reliability, observability, and maintainability.

Requirements

• Deep experience building and shipping production AI/ML systems with measurable business impact.
• Strong applied expertise in personalization and causal inference methodologies.
• Proven track record of defining shared architectural patterns in complex, cross-functional environments.
• Ability to lead senior-level technical discussions and influence direction across departments.
• Excellent communication skills for explaining complex technical concepts to diverse audiences.
• Must be based in or able to work from Stockholm, Barcelona, or London.

Nice to have

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

Culture & Benefits

• Work on one of the world's most iconic mobile gaming franchises at massive scale.
• Collaborate within a cross-functional team of product, analytics, and engineering experts.
• Part of the Microsoft family, offering stability and global reach.
• Focus on technical excellence, mentorship, and high-impact engineering.