About the jobThis role is being recruited for by Vecta, on behalf of one of our partner companies.Your next step is to speak to VectaAdTech Staff Backend AI EngineerSalary: €110k – €130k + equityLocation: Remote (Berlin HQ)Company Description: High-growth AdTech company building performance marketing infrastructureJob Description:Join a Berlin-based AdTech company building backend systems that power large-scale performance marketing and reward platforms. You’ll lead the design and development of scalable Python services that handle pay-out generation, experimentation infrastructure, and algorithm-driven decision systems. This is a backend-focused role with strong collaboration across data and machine learning teams.The Opportunity:You’ll take ownership of critical backend infrastructure within a fast-growing company operating at scale. Working closely with ML and data teams, you’ll influence system architecture, improve reliability and performance, and contribute to real-time decision systems used across the platform.The role offers strong ownership, technical leadership, and impact in a high-growth environment.What you will do:Lead the end-to-end design and development of scalable Python backend systems that handle pay-out generation and delivery.Build and maintain a continuous split-testing infrastructure that allows for robust experiment setups and evaluations.Design personalised payout algorithms that leverage user behaviour signals for real-time decision-making.Ensure system reliability and performance by reducing latency and improving throughput in high-traffic environments.Collaborate closely with ML engineers to seamlessly integrate machine learning pipelines and feature data into your systems.Set coding standards and review architecture, providing guidance to elevate Python engineering practices across the team.Who will thrive here?:You have extensive experience with Python and a solid grasp of SQL, ready to tackle data-rich challenges.You understand cloud infrastructure, particularly AWS and Google Cloud, and can operate services at scale with an eye on cost-efficiency.Your passion lies in building backend systems that are resilient and scalable, with a knack for translating complex logic into working solutions.You have a track record of working in fast-paced environments, demonstrating ownership and technical leadership with a focus on results.You're excited about collaborating with data and ML teams to integrate intricate algorithms into production systems.Tech StackOur client is at the forefront of performance marketing, creating innovative solutions that reward user engagement and build reliable acquisition channels for major advertisers. This profitable startup is recognized as one of Europe's fastest-growing companies.Python . SQL . AWS . Google Cloud . MLflowWho are VectaHave you built AI products before?Vecta helps engineers who’ve already built AI products find roles where AI is central to the work.Talk to Vecta about your preferences, what you’ve built, and the kind of role you want next. Vecta then helps you find your dream role by matching your skills to relevant AI roles at start-ups, scale-ups, and enterprises as they come up.Next stepsStep 1. Apply for this job hereStep 2. Talk to Vecta so we can understand your experience and preferencesStep 3. Vecta will make sure you’re considered for this roleStep 4. If Vecta thinks you're a great fit, you’ll be introduced to the clientStep 5. If not, we’ll find you excellent alternatives. All for freeWe never post fake jobsThis is a real, live role that Vecta is currently recruiting for on behalf of a partner company. In some cases, companies ask us to anonymise roles when advertising them publicly. This means we can’t always share full company details upfront, but the role itself is genuine and actively hiring.Give Vecta a spin - you could land this role. And if not, most engineers find Vecta helpful with their AI job search, and we're giving this service away for free.