Senior Principal AI/ML Engineer at The Blond HR

Barcelona, Catalonia, Spain -

Full Time

Start Date

Immediate

Expiry Date

25 Sep, 26

Salary

0.0

Posted On

27 Jun, 26

Experience

10 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

AI/ML Engineering, Causal Inference, Personalization, System Architecture, Technical Leadership, Production Coding, Prototyping, Decision Automation, Mentoring, Cross-functional Collaboration, Scalable Systems, Observability, Maintainability, Experimentation Platforms, Game Technology

Industry

Advertising Services

Description

Craft: Data, Analytics & Strategy Job Description: Senior Principal AI/ML Engineer – Decision Automation Candy Crush Saga | King Are you motivated by building the shared decisioning foundations for how a live game learns, experiments, and adapts at scale? Join King as a Senior Principal AI/ML Engineer in the Decision Automation team for Candy Crush Saga. In this role, you will help turn fragmented AI/ML and decisioning approaches into scalable, production-grade systems that support faster experimentation, safer adaptation, and more coherent player experiences across the game. This is a hands-on senior technical leadership role. You will shape direction through architecture, code, prototyping, design reviews, and deep technical judgment. We are not looking for a strategy-only leader. We are looking for someone who can build, simplify, and connect complex systems across team boundaries. The Role You’ll join the Decision Automation team within Candy Crush Saga: a cross-functional AI/ML team working closely with product, analytics, engineering, game teams, and central platform partners to enable faster, smarter, and more player-centric decisions across the game. Our mission is to accelerate Candy’s learning loop by automating insight generation, experimentation, and adaptation at scale. This role is central to helping define and build the shared architecture needed to make decision automation more scalable, reliable, and reusable across Candy. The team works across areas such as: Causal inference and simulation capabilities usable by product teams Generalized automated decisioning systems across multiple game features Orchestration across ML systems to reduce conflicting treatments and coordination overhead With hundreds of millions of players, the systems you help shape will operate at significant scale and influence core player-facing decisions across Candy Crush Saga. What You’ll Do Influence technical direction across Candy Crush Saga in AI/ML and decisioning through credibility, clarity, and delivery Stay hands-on through meaningful production coding, technical prototyping, and implementation work on critical paths Set a high bar for production AI/ML engineering, including reliability, observability, maintainability, and quality of execution Mentor senior engineers and raise the standard of technical judgment, design quality, and cross-team collaboration Lead the shared architecture for AI/ML and automated decisioning systems used across multiple components in Candy Crush Saga Help unify fragmented approaches into reusable technical foundations that improve consistency, speed, and scalability Partner with product and game teams to turn high-value opportunities into reusable capabilities rather than one-off solutions What You Bring Deep AI/ML Expertise Deep experience building and shipping production AI/ML systems with meaningful business impact Strong applied expertise in areas such as personalization and causal inference Track record of connecting AI/ML methodology with real production guardrails, constraints and operational use Technical Leadership Proven ability to influence technical direction across teams through credibility, clarity, and execution Experience defining shared patterns, technical standards, or architectural direction in complex environments Ability to lead senior-level technical discussions with substance and precision Communication and Collaboration Excellent communication skills, with the ability to explain complex technical ideas clearly to both technical and non-technical audiences Proven ability to influence across departments and align teams around shared technical direction Strong mentoring capability, especially with senior engineers and technical leaders Comfortable representing technical work in high-visibility forums, internally and externally Product and Cross-Functional Collaboration Able to shape product bets through technical insight and co-create reusable capabilities with cross-functional partners Effective working across engineering, analytics, product, and platform teams Strong judgment in translating business goals into scalable technical systems 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 reducing fragmented or bespoke ML workflows into shared technical foundations Locations: Stockholm, Barcelona and London About King With a mission of Making the World Playful, King is a leading interactive entertainment company for the mobile world with more than 20 years of history of delivering some of the world’s most iconic games in the mobile gaming industry, including the world-famous Candy Crush franchise, as well as other mobile titles such as Farm Heroes Saga. King games are played by more than 200 million monthly active users. King, part of Microsoft (NASDAQ: MSFT), has Kingsters in Stockholm, Malmö, London, Barcelona, Berlin, Dublin, San Francisco, New York, Los Angeles and Malta. More information can be found at King.com or by following us on LinkedIn and @lifeatking on Instagram. Applicant Privacy Policy We bring moments of magic to hundreds of millions of people every single day. We create unforgettable games that are loved around the world. We take the art and science of gaming to the next level through curiosity for the unexplored, passion for games, respect for each other, and love for our players. Who we are King is a leading interactive entertainment company for the mobile world, with people all around the world playing one or more of our games, including franchises such as Candy Crush, Farm Heroes, Pet Rescue and Bubble Witch. We have 249 million monthly active users as of fourth quarter 2019 across web, social and mobile platforms. King was acquired by Activision Blizzard Inc. (Nasdaq ATVI) in February 2016 and operates as an independent unit of the company. Our passion Making great games is incredibly challenging but we’ve proven it can be done… and we see a world of possibilities ahead. We’re challenging ourselves to dream bigger in a Seriously Playful way. We’re experimenting, learning, and adapting continuously to shape the industry in ways yet to be imagined. We’re passionate about bringing moments of magic to our players and we’re not afraid to have fun along the way. Above all, we play as a team, helping each other have impact on a massive scale. And we’ll know we’ve outdone ourselves when we’ve inspired the world to play. If you share our passion, our values, and our hunger to shape the future, join us in Making the World Playful! Together, we’ll create new experiences that raise the bar, delight billions of people, and redefine the world of games again and again. This Applicant Privacy Notice summarizes how the information you submit as a job applicant through this website will be handled and protected by King and its subsidiaries ("we" or "us") For full details regarding the types of information we may collect from you, how and why we use this information, and with whom we share this information, please see our Applicant Privacy Policy.

Responsibilities

Lead the design and implementation of scalable, production-grade AI/ML and decision automation systems for Candy Crush Saga. Drive technical direction through hands-on coding, architecture design, and mentoring senior engineers to unify fragmented AI approaches.