Principal ML Engineer

WHO WE ARE Adikteev is an AdTech company that helps mobile app publishers grow their revenue through targeted advertising. We deliver personalized ads that drive users to install an app or re-engage with one they've stopped using. Our clients are mostly mobile gaming leaders but also span e-commerce, on-demand services, and entertainment apps. Recognized for 10+ years as one of the top mobile retargeting platforms, Adikteev now operates globally from Paris, San Francisco, Barcelona and Seoul and has grown to over 120 employees. Beyond the business, Adikteev is consistently recognized as a great place to work. With an 18-nationality team, a 4.5-day work week, and a strong focus on inclusion, Adikteev is a place where people genuinely stay. WHAT TEAM YOU WILL BE PART OF You will be joining the Machine Learning team . They have full ownership of Adikteev's ML ecosystem; building and maintaining the systems that power the core of our business at massive scale. They operate with a strong product ownership mindset, working at the intersection of research and production, where the models they ship have a direct and measurable impact on billions of real-time decisions every day. WHAT YOU WILL DO Technical Leadership : Set technical direction, Model Development : Design and train on predictive models for CTR, CR, VTA, bid shading, and auction-win probability across display and video inventory, Platform Engineering : Scale our ML platform — feature stores, training pipelines, model versioning, A/B experimentation — to support multiple model families running in production simultaneously, Real-time Systems : Drive sub-10ms inference at high QPS through model optimization (ONNX), efficient serving, and latency-aware architecture decisions, MLOps & Observability : Own end-to-end ML workflows from data ingestion through monitoring: drift detection, shadow scoring, A/B tests, and automated retraining triggers ; drive design reviews, ADRs, and mentoring of senior+ ML engineers. Translate business objectives into technical strategies, Cross-functional Partnership : Work closely with Tech Reporting and Analytics to define ML KPIs, instrument experiments, and communicate model performance to stakeholders up to Comex level, Applied Research : Design and set up a neural network for adtech from the ground up, taking it from prototype to production in our bidding stack. ★ WHO YOU ARE You could be a great addition to our Engineering team if you have: 8+ years of industry ML engineering experience, with 3+ years building and owning production ML systems at scale. Hands-on adtech experience is required — programmatic advertising (RTB/DSP), mobile attribution (MMP ecosystem, SKAdNetwork, Privacy Sandbox), or real-time bidding — alongside deep expertise in recommender systems and/or LTV/churn modeling. Strong command of the modern ML stack: Python, PyTorch or TensorFlow, scikit-learn, MLflow or Weights & Biases, Spark or Flink for feature engineering. Experience with real-time serving infrastructure: Triton, TorchServe, Ray Serve, or custom low-latency gRPC services. Solid software engineering fundamentals — you write production-grade, reviewable code and care about system reliability. Track record of delivering value incrementally — shipping working software in small, frequent increments rather than large multi-quarter projects. Clear, concise communicator who can translate model performance into business impact for non-technical audiences. Please note that, to comply with employment regulations, applicants are required to maintain residency and be legally authorized to work in France or the European Union in order to be considered for this position. COMPENSATION Competitive Salary between 130,000€ and 150,000€ OTE We are committed to transparent compensation practices. The salary range shown reflects total On-Target Earnings (OTE), including base salary and a performance-based Quarterly bonus with transparent KPIs. Final compensation will be tailored to each candidate’s background, experience, skills, and overall fit for the role. ★ PERKS AND BENEFITS* Competitive Salary ; Performance-based Quarterly bonus with transparent KPIs; Longevity bonus every 2 years ; 4 1/2 days work week (Fridays afternoon off) ; “RTT” ; Mental Health support ; Flexible remote working policy ; Regular team-life event / activity ; Inclusive parental leave Policy. *Most benefits are available to all employees. For remote team members based outside of France, benefits will be aligned with local laws and practices in your country of residence, ensuring support that’s both relevant and compliant wherever you are. ★ OUR PROCESS What to expect as you move through our hiring process: HR interview with Claire, Senior Talent Acquisition Partner Technical test, Technical interview with Gwennaëlle, Staff ML Engineer and Pedro, Senior ML Engineer, Manager interview with Cédric, CTO, Comex interview. If you require accommodations at any stage of the application process, please let us know. It will be handled confidentially by our HR and recruitment team. ★ OUR COMMITMENT We’re proud that our team already spans 22+ nationalities, diverse talent and unique backgrounds, and we want it to grow even more. If this role appeals to you, we welcome your application, even if you don’t meet every single qualification. Not everyone gets through our hiring process, but your skills might be a great fit for another opportunity; now or in the future. Adikteev is an equal opportunity employer. We are committed to building an inclusive environment for all employees, candidates, vendors and clients, regardless of race, color, religion, gender, gender identity or expression, sexual orientation, age, national origin, disability, marital status, or military status.