Senior AI/Machine Learning Engineer (Python, PyTorch)

FinOS Technology is a fintech company with the mission to provide simple, affordable and tech-enable financial products & service thought all digital ecosytem.Model Development & OptimizationMaintain and enhance existing AI models for OCR on Vietnamese ID cards (CCCD) and extend to other document types (passports, driver licenses, bank documents).Fine-tune and adapt state-of-the-art OCR/document models (Donut) for production use.Optimize training and inference pipelines for performance, scalability, and cost efficiency.Data Pipeline & Quality ManagementManage large datasets combining synthetic and real-world document images.Build preprocessing and augmentation pipelines: image quality checks, blur/rotation detection, Vietnamese text normalization, PII masking.Ensure data quality and evaluation consistency across multiple document types.Accuracy & Performance EvaluationDefine and monitor evaluation metrics: character/word accuracy, exact match rate, edit distance, latency.Analyze failed predictions (e.g., accents, truncated fields, misrecognized entities) and integrate findings into retraining cycles.Implement image/document quality control to prevent poor inputs from degrading OCR accuracy.Production & MonitoringDeploy, monitor, and maintain OCR models serving production workloads (100k+ documents/month).Investigate and resolve production failures, manage rollbacks, and improve system robustness.Collaborate with backend engineers to integrate OCR APIs with downstream systems.Collaboration & LeadershipMentor junior engineers in computer vision and OCR best practices.Contribute to the long-term roadmap for Document AI, beyond ID cards, to support broader fintech/eKYC and document processing needs.Document experiments, model updates, and operational practices.