AI-assisted — A standard engineering role where AI tools are a bonus on top. It still expects real engineering depth.
Madbox is a fast-growing mobile gaming company with a very unique way of developing games. Everything has been designed so teams can take as much ownership as possible, unleash their creativity, see their games reach millions of players, and have fun on the way. Casual people, Mad ambition!
As Senior Playable Developer, you will bring this in-house: building fast, high-performing interactive ads that give players a real taste of our games. You will create modular template systems, iterate rapidly on winning concepts, and establish an in-house playable production capability that reduces agency dependency. Most importantly, you have a strong sense of "game feel" - you know how to make interactions snappy, satisfying, and addictive.
Your future responsibilities and scope:Develop interactive playable ads from concept to deployment across major ad networks
Build modular, reusable playable templates and component libraries for rapid iteration
Iterate on top-performing playables, enabling data-driven A/B testing of mechanics, hooks, and CTAs
Ensure cross-platform compatibility, meet size limits, load time requirements, and performance standards
Collaborate with the Creative Lead on concept development and with Tech Art on asset pipelines
Explore new interactive ad formats, evaluate AI-assisted playable generation tools, and stay current with playable ad technology
4+ years developing playable ads or interactive web content
Strong proficiency in JavaScript, HTML5, and CSS
Experience with playable ad frameworks or custom HTML5 game engines
Solid understanding of game development fundamentals (game loops, input handling, basic physics)
Familiarity with ad network specifications and constraints
Optimization mindset: file size, load time, frame rate
Comfortable with rapid prototyping and short iteration cycles
Regular use of AI-assisted development tools (e.g., Cursor, Claude Code)
Experience with Canvas/WebGL experience
TypeScript
Phaser or similar frameworks
Please note: unfortunately, this position is not open to relocation, and we cannot offer visa sponsorship.
Compensation transparencyThe salary range for this role is €45,000–€60,000 gross/year. Final compensation is based on the candidate's experience and demonstrated skill level.
How do we hire at Madbox?Meet the recruiter
Meet the direct manager
Home Assignment
Meet the team
Meet with Leadership
At Madbox, different backgrounds, cultures, and ways of thinking aren't just welcome; they're part of what makes the team good. We hire on talent and fit with our values, regardless of who you are or where you come from.
AI in our processParts of our hiring process may get a hand from AI - things like summarizing responses, or flagging inconsistencies, and taking notes during interviews to focus on what matters the most: the candidates. Everything is there to help our recruiters, not to decide anything. Every final call on hiring is made by a human. For full details on how your data's handled, you can check our privacy policy.