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

Mitek Systems
Mitek Systems
Spain / Barcelonaremote€50,000 - €75,000Added 2 months agoPermanentRemote: Remote

Requirements

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 

      Contribute to production ML systems, ensuring:  

    • Scalability and reliability  

    • Monitoring and performance tracking  

      Continuous improvement against evolving threats   

      Collaborate closely with:  Fraud & AI research teams, Data collection and annotation teams, MLOps and platform engineering, Product teams  

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  

Benefits

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. 

Original Advert

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

    Direct impact on protecting users from real-world threats

    Collaborate with experts across fraud, biometrics, and AI research

    Opportunities for growth across teams and domains within Mitek

    A culture focused on collaboration, innovation, and continuous learning

The Impact You'll Make

As a Machine Learning Engineer, you will join our Fraud & AI Integrity group, specifically focused on deepfake detection, digital manipulation, and injection attack detection in selfie-based identity verification.

This is a hands-on, production-focused role where you will design and deploy computer vision models that operate in adversarial environments. Your work will directly contribute to protecting users and businesses from sophisticated fraud attacks powered by AI.

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!

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