Senior Software Engineer in Barcelona

As a Senior Software Engineer in the Gameplay & Monetisation domain, you’ll help build and evolve one of the world’s biggest live mobile game franchises, delivering high-quality, reliable game features and systems that reach millions of players every day. You’ll design, implement, test, optimize, and maintain code while collaborating closely with designers, artists, producers, and fellow engineers in a collaborative, high-impact environment.  

Soda King’s second largest game, Candy Crush Soda Saga, is loved by millions of players worldwide, matching Swedish fish, rescued Soda gummy bears, and popped soda bottles to win points, defeat obstacles and progress through more than 11,000 levels.  

We’re an iconic team growing a sweeter future for one of the biggest casual mobile IPs in the world through attracting the world’s best talent. Our ambition is to continue raising the bar for our players when it comes to creativity, product, and technology.  

Your Role Within the Kingdom

• Design, architect, implement, and test new and existing game features, with a focus on monetisation systems and features that drive player value and economy engagement.

• Maintain and optimize client-side systems for memory, performance, and device diversity at mobile scale.

• Lead through expertise and collaboration; contribute to technical discovery, evaluate trade-offs, and choose effective methods and techniques to reach outcomes.  

• Champion quality through code reviews, well-structured code, and testing practices; proactively identify risks and propose solutions.  

• Collaborate in a cross-functional, player-centric team; share knowledge and help teammates grow.  

Skills to Create Thrills  

• Senior individual contributor who takes initiative and often guides the team through their expertise.  

• Tackles complex issues requiring in-depth evaluation; goals set in solution or project terms; works with broad autonomy and sound judgment.  

• Anticipates needs, drives improvements, and champions impactful projects and initiatives across the product area.  

Experience

• Proven experience delivering production-quality software for complex, performance-sensitive applications or games.  

• Demonstrated ability to design, ship, and iterate on features in a live product environment with cross-functional partners.  

• Track record of operating independently on complex problems and influencing solutions across stakeholders.  

Knowledge and skills

• Strong C++ development skills and comfort working across the mobile client tech stack, or equivalent systems programming experience.  

• Solid grasp of performance, memory, and optimization techniques for Android/iOS environments.  

• Software engineering fundamentals: clean architecture, testing, debugging, code reviews, and version control workflows.  

Key attributes

• Player- and quality-focused, with attention to detail and polish.  

• Collaborative communicator who shares knowledge and elevates teammates.  

• Curious, proactive problem solver who proposes solutions and trade-offs and adapts quickly in a live game setting.  

Bonus points

• Experience in professional game development.  

• Experience with Android or iOS development, real-time rendering, or performance/memory-constrained applications.  

About King

With a mission of Making the World Playful, King is a leading interactive entertainment company 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 game hits 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.