# Senior Machine Learning Specialist - Company: [Hamster]() - Location: San Francisco ยท Auckland - Team: Engineering - Employment type: Full Time - Posted: October 14, 2025 ## Job description You will be responsible for developing and implementing machine learning solutions that power our AI-native platform. This role requires expertise in custom model development, transformer architectures, and production deployment of ML systems. ## Responsibilities * Design and develop custom machine learning models for specific business use cases. * Implement and optimize transformer architectures for natural language processing tasks. * Develop and maintain ML pipelines for data preprocessing, model training, and inference. * Work with large language models and implement fine-tuning strategies. * Implement retrieval-augmented generation (RAG) systems and optimize their performance. * Collaborate with engineering teams to deploy ML models in production environments. * Monitor and maintain model performance in production, implementing retraining strategies as needed. * Conduct research on emerging ML techniques and evaluate their applicability to our platform. * Mentor junior ML engineers and contribute to best practices within the team. ## Required Skills and Qualifications * Master's degree or PhD in Computer Science, Machine Learning, or a related field, or equivalent practical experience. * 5+ years of experience in machine learning development and deployment. * Strong programming skills in Python and experience with ML frameworks (PyTorch, TensorFlow, or similar). * Deep understanding of transformer architectures and their applications in NLP. * Experience with large language models and fine-tuning techniques. * Proficiency in implementing and optimizing RAG systems. * Experience with ML model deployment and production monitoring. * Strong understanding of data preprocessing, feature engineering, and model evaluation techniques. * Experience with cloud platforms and ML infrastructure (AWS SageMaker, Google Vertex AI, or similar). * Excellent problem-solving skills and attention to detail. * Strong communication and interpersonal skills. ## Preferred Qualifications * Experience with MLOps and ML pipeline orchestration tools. * Knowledge of distributed training and model optimization techniques. * Experience with vector databases and similarity search algorithms. * Familiarity with reinforcement learning and multi-agent systems. ## Apply [Apply on Hamster]() Canonical job page: