Join the team!As we continue to grow, we are now looking for a Senior Playable Ads Developer to join our Creative team. As a Senior Playable Ads Developer you will drive technical quality and consistency across all playable projects. You will set standards, mentor team members, and solve complex development challenges to support our performance marketing goals.This is a permanent role based in our Leamington Spa studio, where our daily in-office collaboration fuels creativity and innovation.ResponsibilitiesLead the development and maintenance of top-tier 2D and 3D playable ads, primarily using Cocos Creator v3.x and other modern browser-based game engines, to achieve industry-leading engagement and performance benchmarks.Define, implement, and maintain key methodologies and reusable systems to optimize production workflows and ensure efficient, high-quality playable ad delivery.Mentor junior developers and provide technical guidance to mid-level developers, fostering skill growth and collaborative problem-solving within the team.Collaborate closely with artists, designers, and User Acquisition (UA) teams to translate creative visions into highly effective and technically sound playable ad experiences.Proactively identify, diagnose, and resolve complex technical issues, while actively contributing to architectural decisions and pipeline improvements for playable ad development.Contribute directly to the company’s profitability by continuously improving the efficiency, performance, and creative impact of all playable ad deliverables.Ensure rigorous standards for documentation, comprehensive performance testing, and thorough QA processes are maintained across all projects.Integrate and optimize playable ads with various ad-network wrappers, including MRAID, for seamless functionality across platforms like Unity (via WebGL export), Applovin, IronSource, and Mintegral.Requirements5+ years of hands-on professional experience in game development or interactive web experiences, with a strong emphasis on playable advertisements.Demonstrated expertise in building performant and scalable 2D and 3D playable ads using Cocos Creator (v3.x preferred), JavaScript, and HTML5.Proven experience with modern browser-based game engines and related front-end technologies.Direct experience exporting playable ad builds specifically optimized for major ad networks such as Unity (WebGL), Applovin, IronSource, or Mintegral.Strong understanding and practical experience with integrating MRAID or other ad-network SDKs/wrappers into playable ad creatives.Track record of successfully optimizing playable ad builds to adhere to strict size constraints (e.g., 3-5 MB) without compromising quality or performance.Proven mentorship skills and a demonstrated ability to technically lead, guide, and inspire a development team.Strong understanding of key ad performance metrics (e.g., CTR, IPM, CVR) and how development decisions influence these outcomes.Excellent problem-solving abilities, coupled with a meticulous attention to code quality, detail, and robust implementation.Good to have: Experience with C++ and Unity game development.Why Kwalee?Generous Holiday: Start with 25 days of annual leave, plus bank holidays. You'll also earn an extra day for every year of service, up to 5 years!Flexible Working: We offer core hours that allow you to work flexibly around your life, and a bank of 'Work From Home' days to use when you need them.Health Cover: Private medical cover, life assurance, a solid pension plan, and cover for dental and optical care.Recharge: Take advantage of our on-site gym and a supportive atmosphere that prioritises your wellbeing.Free Food & Drink: Fuel your day with unlimited free snacks and drinks.Gaming Goodies: Receive Steam codes for all our game releases!Dog-Friendly Office: Bring your furry friend to our vibrant, fun office.Office Location: Leamington Spa office location, with from parking and electric charging stations.Merch & Events: Get exclusive Kwalee merch, enjoy fun seasonal events, and stay informed with regular town halls.Our Commitment to Diversity & InclusionAt Kwalee, we take pride in being an equal opportunity employer, where we believe that diversity and inclusion are essential to driving creativity. We are committed to creating a safe, welcoming, and supportive environment where everyone can thrive.Our culture is built on celebrating the diverse voices of our team members, fuelling innovation and strengthening our connection to our players. We are dedicated to advancing equity, diversity, and inclusion across all areas of life, including age, disability, gender identity, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation.We recognise the importance of self-development, career progression, and well-being in retaining our talented team. At Kwalee, we celebrate individuality and encourage everyone to bring their authentic selves to work.