Principal Machine Learning Engineer

This isn’t your regular job. Almedia is a place where those who want to push harder can accelerate their careers faster than anywhere else. We’re aiming to become Germany’s second bootstrapped unicorn. Almedia is already Europe’s #3 fastest-growing company in 2025 (FT1000). We are building the future of marketing by rewarding our community of over 70 million users for engaging with our advertisers’ products. We are offering a new way to acquire users for the biggest companies in the world. Principal Machine Learning Engineer You'll take ownership of the hardest ML problems across Almedia's products and growth. This is a hands-on role for someone who identifies what matters most, sets the technical direction, and drives it end to end with minimal oversight. Types of problems you'll be solving Designing and owning the strategy for user reward schemes at scale, across behaviour signals and market dynamics Architecting real-time personalisation systems for reward values that operate at production scale Defining how we detect and diagnose underperforming campaigns, and building the systems that act on it Your role Own end-to-end delivery of high-impact ML systems: from problem framing through to production and iteration Set the technical bar for ML across the org, establishing best practices and raising the quality of decisions Define where ML creates the most business value and align the roadmap accordingly Apply advanced statistical and causal inference methods with rigour and production-readiness Partner with product and engineering leadership to shape how technical capability maps to strategic priorities You have A strong track record of taking ambiguous, high-impact problems from first principles to production independently Deep expertise in statistics, causal inference, and experimentation at scale Mastery of Python and SQL, with extensive hands-on cloud and production systems experience A history of setting technical direction and raising the bar for engineering teams around you The communication range to influence both engineers and senior business stakeholders Bonus points for Passion for gaming and a strong intuition for player behaviour Experience in adtech, monetisation platforms, or the gambling industry Familiarity with gaming KPIs such as pLTV, retention, and ROAS Why Almedia? Scale With Almedia: Have a real impact and grow alongside a startup that has been profitable from day one. High-Growth Environment: We encourage all staff to take ownership of projects and consistently raise the bar. Do More, Get More: Generous bonus scheme to ensure great, proactive work is valued. We believe in fostering talent, evaluating all skill levels during the hiring process, and providing a clear path for growth. Almedia is an equal opportunity employer. We embrace and celebrate diversity, and encourage individuals from all backgrounds to apply.