Machine Learning Engineer (Deepfake & Injection Attack Detection / Face Liveness)

About Mitek  Mitek (NASDAQ: MITK) is a global leader in digital identity verification, biometric authentication, and fraud prevention. Our AI-powered platform combines computer vision, biometrics, and machine learning to help organizations securely onboard users and defend against emerging threats such as deepfakes and AI-driven fraud.  Trusted by over 7,500 organizations worldwide, Mitek processes millions of identity transactions daily. Headquartered in San Diego, with a strong presence across Spain, France, Mexico, and the UK and the Netherlands. Visit us at www.miteksystems.com.we are driven by a clear mission: protect what’s real.  At Mitek, we believe that teams are more resilient, effective, and innovative when they benefit from a wide range of ideas, lived experiences, and perspectives. The strength of our organization is deeply rooted in the people who power it.​ ​ We know that a workforce reflecting the richness of our communities and customers helps us better serve their needs. These lived experiences influence our decisions, shape our products, services, and help us grow with intention. When it comes to talent, our goal is clear: to discover exceptional individuals and to ensure they discover us. We prioritize drive, skill, experience, and ambition in everything we do for our clients. We are a Virtual First organization that values flexibility, collaboration, and innovation, while fostering an inclusive environment where diverse perspectives drive better outcomes.  Why Join This Team  Work on AI that fights AI-driven fraud   We take pride in enabling career growth in an environment of innovation and teamwork.  Our commitment to all Mitekians is to do meaningful work that matters.  Our culture is defined by delivering our best to our customers by providing high value solutions and impactful outcomes, by continuously challenging convention, and by caring for each other through collaboration and celebrating our successes.  We are committed to creating competitive, equitable compensation & benefits programs and career development opportunities.    We sincerely appreciate your interest in Mitek. We know your time is valuable and look forward to the potential of speaking with you further!    Please check our policy: https://www.miteksystems.com/careers/ai-and-interviewing-at-mitek country: ES all locations: [Spain Barcelona] commitment: Full Time department: Global Depts location: Spain team: 71 - Research What You Will Do (Core Responsibilities):: Design, train, and deploy machine learning models for image-based fraud detection, including:   Deepfake detection   Injection attack detection   Digital manipulation analysis in biometric verification   Work end-to-end across the ML lifecycle:   Dataset curation (large-scale, noisy, adversarial datasets)   Model development and training   Evaluation and iteration using fraud-relevant metrics   Production deployment and monitoring   Build robust data pipelines, including:   Data validation, cleaning, and labeling strategies   Handling class imbalance, bias, and distribution shift   Define and execute evaluation frameworks focused on real-world performance:   Precision/recall trade-offs   False positive vs. fraud detection balance   Robustness to unseen attack types   Collaborate closely with:   Fraud & AI research teams   Data collection and annotation teams   MLOps and platform engineering   Product teams   Contribute to production ML systems, ensuring:   Scalability and reliability   Monitoring and performance tracking   Continuous improvement against evolving threats   Who You Are (Soft Skills)::   A pragmatic problem-solver who understands the gap between research and production   Comfortable working in adversarial, fast-evolving problem spaces   Able to clearly communicate technical concepts and trade-offs   Collaborative and adaptable, with a strong sense of ownership   Motivated by building technology that has real-world impact   What You Need (Required Knowledge, Technical Skills):: Required Qualifications: Bachelor’s degree in Computer Science, Engineering, or related field   2+ years of experience deploying machine learning models into production   Strong background in computer vision (image-based ML)   Solid programming skills in Python   Hands-on experience with PyTorch and/or TensorFlow   Experience working with real-world datasets and building data pipelines       Tech Stacks  Cloud: AWS   Languages: Python   ML Frameworks: PyTorch, TensorFlow, Scikit-learn   Data Tools: Pandas, OpenCV   Infrastructure: Docker, CI/CD, cloud-based ML pipelines   What Would be Nice (Preferred Experience):: Advanced degree (PhD or equivalent experience in Machine Learning or Computer Vision)   Experience in fraud detection or adversarial ML domains   Experience with deepfake detection, image forensics, or manipulation detection   Familiarity with generative AI models (training or analysis)   Background in data science or data engineering   What We Provide (Benefits):: Competitive package  Full Remote contract  Annual Leave  Home Office Allowance  Annual Bonus – up to 10%  Health Insurance  Learning & Development: We promote continuous learning and support role-aligned development opportunities, with access to a complimentary LinkedIn Learning licence.