***At Topaz, technology unites us, and evolution connects us!*** Within our organization, we are fully committed to contributing to financial solutions that make the industry safe, accessible, and dynamic. We aim to reach diverse regions worldwide with our extensive ecosystem of technological solutions. Therefore, we invite you to join this team! Moreover, we offer excellent benefits for you! We know that together we will achieve success—so apply now and become part of this outstanding team. **Responsibilities and Duties** **Your Day-to-Day at Topaz:** At **Topaz**, you will be responsible for leading the development and deployment of advanced models that drive large-scale fraud prevention. Your day-to-day work will be challenging and full of opportunities to apply your technical and strategic skills. Key activities include: * **Model Development and Experimentation:** Design, train, and validate machine learning models using advanced algorithms. Conduct experiments to test new approaches, tune hyperparameters, and evaluate metrics such as FPR and recall. * **Production Deployment and Monitoring:** Collaborate with MLOps engineers to build robust pipelines ensuring model scalability in production environments. Monitor model performance in production, identifying potential degradation or opportunities for continuous improvement. * **Optimization and Continuous Maintenance:** Update models with new data to ensure continued relevance amid evolving fraudulent behavior. Implement explainability techniques to ensure model transparency and regulatory compliance. * **Research and Innovation:** Explore emerging technologies, frameworks, and algorithms to keep the solution at the forefront of fraud detection. Contribute to establishing best practices and technical standards within the team. **Requirements and Qualifications** **What do you need to know to join Topaz?** **Data Science and Modeling** Analyze structured and unstructured data to identify patterns related to fraud and money laundering * Develop machine learning models (classification, clustering, anomaly detection) for financial security challenges * Apply feature engineering, handle missing values, normalize data, and balance datasets * Prevent data leakage during dataset splitting and validation * Create visualizations to communicate results to diverse audiences * Experiment with various algorithms (Scikit-learn, LightGBM, CatBoost, Keras, TensorFlow, PyTorch) **Data Engineering** Work with distributed databases (Athena, Hive, Spark) processing large volumes of data * Optimize SQL queries to reduce costs and execution time * Manipulate structured (CSV, Parquet) and unstructured (JSON, images) data * Develop data transformation and preparation pipelines **Machine Learning Engineering** Build and maintain automated ML pipelines (training, validation, deployment) * Containerize applications using Docker * Manage PODs and deployments with Kubernetes * Ensure scalability and availability of solutions **Monitoring and Maintenance** Monitor model performance in production * Detect and correct data drift and concept drift * Configure alerts and dashboards for key metrics * Implement automated retraining and model versioning * Apply explainability techniques (XAI) for regulatory compliance **Innovation** Research emerging ML technologies and algorithms * Contribute best practices and technical documentation * Stay up-to-date with developments in Data Science and Machine Learning **Mandatory Requirements** Foundations **Mathematics and Statistics:** * Strong foundation in mathematics, statistics, and probability **Machine Learning:** * Experience with classification, clustering, and anomaly detection algorithms * Proficiency across the full ML lifecycle: data transformation, feature engineering, training, and validation * Frameworks: Scikit-learn, LightGBM, CatBoost, Keras, TensorFlow, PyTorch **Data:** * Data manipulation using NumPy and Pandas * Handling unstructured data (JSON, images) * Visualization (Matplotlib, Seaborn, Plotly, ApexCharts) **Databases:** * Experience with SQL and relational databases * NoSQL (MongoDB, DocumentDB, DynamoDB) * Distributed databases (Athena, Hive, Spark) * Query optimization * Python ORM **Python:** * Robust Python development * Git for version control * Data structures, algorithms, and design patterns * Testing: pytest (unit tests), Locust (load testing) **Cloud and Infrastructure (AWS):** * S3, Athena, DynamoDB, EC2, Lambda, ECR, ECS/EKS * Docker for containerization * Kubernetes for orchestration * Terraform (basic concepts) * GitLab CI/CD (basic concepts) **Preferred Qualifications** * MLOps tools (Dagster, MLflow, Kubeflow, Airflow) * Feature stores and model registries * Experience in fraud detection, anomaly detection, or financial security * NLP or image processing (OpenCV, PIL) * AWS certifications (Solutions Architect, ML Specialty) * Open-source contributions or technical publications If you match this profile and want to join an innovative and dynamic team, come to Topaz! **Additional Information** **Keep in mind these benefits designed to enhance your experience at Topaz!** * **Health and Well-being:** Because we care about our teams, we offer various health plans focused on promoting organizational well-being. * **Personal and Professional Development:** We are constantly evolving. Thus, we provide environments, programs, and policies that guarantee the space and opportunities needed for your career path. * **Flexibility and Time Off:** Here, you’ll find the time needed to recharge, plus the ability to enjoy a day off on your birthday. Hybrid work model. * **Partnerships:** We offer various partnerships and discounts. At **Topaz**, we go beyond technological creation: **we transform how the world interacts with money.** Our secret? **Topaz One—the first global full-banking platform, designed to accelerate the evolution of financial institutions and propel them into new frontiers.** #### **We are a vibrant community of over 2,000 Topazers**, united by a deep passion for technology, innovation, and building disruptive solutions. Our diversity of cultures and experiences enriches our perspective and drives us toward extraordinary outcomes. #### **If you seek a place where your talent makes a real impact, where you can grow professionally and join a global community shaping history,** **join us as a Topazer!** #### **Join our team and help build the future of finance.**