PENNYMAC · 2 days ago
Sr Full Stack Developer AI Native
Westlake Village, CA
Full-time
Onsite
Mid, Senior Level
$90K/yr - $150K/yr
3+ years expPennymac is a specialty financial services firm focused on the production and servicing of U.S. mortgage loans. The Sr Full Stack Developer AI Native will design, develop, and deploy full-stack applications, architect scalable APIs, and collaborate with cross-functional teams while leveraging AI tools to enhance development workflows.
BankingFinanceFinancial ServicesLendingMortgage
Responsibilities
Design, develop, and deploy full-stack applications using React 19+, TypeScript, and modern backend frameworks or languages
Architect scalable APIs and data-driven services with attention to performance and reliability
Implement secure authentication flows, error handling, and production-grade monitoring
Design and optimize database schemas and ensure efficient query performance
Build responsive, accessible, and performant user interfaces
Leverage AI coding assistants (e.g., GitHub Copilot, Cursor, Claude Code) to increase development velocity and code quality
Contribute to internal developer tools, AI agent integrations, and LLM-powered features
Collaborate cross-functionally with product, design, and DevOps teams in an agile environment
Mentor engineers on AI-augmented coding workflows and modern development practices
Qualification
Required
3+ years of full-stack software development experience in production environments
2+ years of experience using TypeScript across front-end and back-end contexts
Expert-level proficiency in ReactJS and modern front-end development patterns
Strong foundation in backend engineering - Node.JS preferred, including:
Scalable API design (REST or GraphQL)
Database schema design and optimization
Authentication and authorization best practices
Concurrency and performance optimization
Robust error handling and observability for production systems
Hands-on experience with cloud environments (AWS preferred) and microservice architectures
Demonstrated use of AI coding tools in professional development settings
Strong communication skills and a collaborative mindset
Preferred
Experience with Auth0 or federated SSO integrations
Familiarity with LLM integration, RAG pipelines, or vector databases
Knowledge of Infrastructure as Code (Terraform, CDK, or CloudFormation)
Exposure to AI safety or responsible AI development
Benefits
Comprehensive Medical, Dental, and Vision
Paid Time Off Programs including vacation, holidays, illness, and parental leave
Wellness Programs, Employee Recognition Programs, and onsite gyms and cafe style dining (select locations)
Retirement benefits, life insurance, 401k match, and tuition reimbursement
Philanthropy Programs including matching gifts, volunteer grants, charitable grants and corporate sponsorships
Company
PENNYMAC
Pennymac is a home loan lending company that offers financial services.
1001-5000 employees
H1B Sponsorship
PENNYMAC has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (48)
2024 (42)
2023 (33)
2022 (44)
2021 (65)
2020 (34)
Funding
Current Stage
Public CompanyTotal Funding
$2.33B2025-12-11Post Ipo Debt· $75M
2025-08-07Post Ipo Debt· $650M
2024-05-20Post Ipo Debt· $850M
Leadership Team
Amar Nadig
Senior Vice President of Enterprise Data
Kevin Ryan
Senior Managing Director and Chief Strategy Officer
Recent News
MarketScreener
2025-12-20
2025-12-16
2025-11-06
Company data provided by crunchbase