Sr AI Engineer

Pennymac

Pennymac (NYSE: PFSI) is a specialty financial services firm with a comprehensive mortgage platform and integrated business focused on the production and servicing of U.S. mortgage loans and the management of investments related to the U.S. mortgage market.

At Pennymac, our people are the foundation of our success and at the heart of our dynamic work culture. Together, we work towards a unified goal of helping millions of Americans achieve aspirations of home ownership through the complete mortgage journey.

We’re looking for a highly experienced and motivated Senior AI Engineer to develop and deploy cutting‑edge AI/ML solutions within our AI Accelerator Team. You’ll work with and mentor a team of engineers responsible for leveraging the latest AI technologies and ML models to deploy best‑in‑class tools for Pennymac’s employees and customers. This role requires a deep understanding of AI agentic programming, machine learning algorithms, natural language processing (NLP), computer vision, AWS and GCP cloud technologies, and MLOps practices.

Strong communication skills are essential to effectively collaborate within the team and provide technical mentorship to peers.

• Design and implement AI/ML solutions on AWS Bedrock and Google Vertex AI, including model selection, training, optimization, and deployment.
• Utilize AWS services (e.g., EC2, S3, Lambda, Sage Maker) and GCP services (e.g., Compute Engine, Cloud Storage, Big Query, Vertex AI) to build and manage scalable cloud infrastructure for AI/ML workloads.
• Develop and optimize high‑performance machine learning models using Python and relevant libraries such as Tensor Flow, PyTorch, and spaCy for predictive analytics and NLP.
• Implement and manage MLOps practices to ensure efficient model development, deployment, monitoring, and retraining within the IDP pipeline.
• Demonstrate proficiency in utilizing AWS Bedrock services (e.g., Titan FMs, foundation models) and Google Vertex AI services (e.g., Vertex AI Workbench, pre‑trained APIs).
• Design and implement robust data pipelines for efficient data ingestion, preprocessing, and feature engineering.
• Identify and resolve performance and scalability issues in models and infrastructure to improve the accuracy and efficiency of tools in production.
• Collaborate with cross‑functional teams (e.g., product management, data science, software engineering) to deliver impactful solutions that meet business requirements.
• Participate in code reviews and provide technical guidance to peers on best practices and latest technology trends.
• Work with Dev Ops teams to ensure continuous delivery of the product using agile methodology.
• Stay abreast of the latest advancements in AI/ML, NLP, computer vision, and cloud technologies to evaluate new techniques that enhance our AI solutions.

• Bachelor’s degree or equivalent work experience
• 5+ years of relevant work experience
• Fin Tech or Mortgage Domain knowledge
• Experience in Evaluation Driven Development
• Experience in Agile/SCRUM using Jira
• Experience with feature flagging and service/API semantic versioning
• Experience building and maintaining effective relationships with product managers, architects, technical leads, and business stakeholders

As one of the top mortgage lenders in the country, Pennymac has helped over 4 million lifetime homeowners achieve and sustain their aspirations of home. Our vision is to be the most trusted partner for home. Together, 4,000 Pennymac team members across the country are guided by our core values: to be Accountable, Reliable and Ethical in all that we do.

Pennymac is committed to conducting a business that makes positive contributions and promotes long‑term sustainable growth and to fostering an equitable and inclusive environment, where all employees and customers feel valued, respected and supported.

Whether you’re looking for flexible benefits for today, setting up short‑term goals for tomorrow, or planning for long‑term success and retirement, Pennymac’s benefits have you covered.

• Comprehensive Medical, Dental, and Vision
• Paid Time Off Programs including vacation, holidays,…