Full Stack Developer (AI Native)

Overview As Senior AI-Native Full Stack Developer in Pennymac’s DCX engineering team, you own the customer-facing web platforms and APIs, blending frontend excellence with a robust payments and rules engine. You’ll leverage AI coding tools to accelerate delivery, improve code quality, and drive automation. You’ll contribute to scalable, secure transaction workflows and mentor others in AI-enabled practices. This role sits at the intersection of fintech, AI tooling, and high-velocity software delivery, shaping the customer experience at scale. Compensation / BenefitsComprehensive medical, dental, and visionPaid time off including vacation/holidaysWellness programs and onsite facilities (location-dependent)Retirement benefits with 401k matchLife insuranceTuition reimbursement ResponsibilitiesMaintain and scale React (19+) frontend and Node.js/TypeScript monorepos with strong error handling and secure authDesign and safeguard complex payment rules, fee calculations, and financial validation flowsDrive AI-augmented engineering using tools like GitHub Copilot, Cursor, and Claude Code; contribute to internal tooling and AI featuresRefactor for low cyclomatic complexity; decompose monoliths into modular, testable unitsMentor junior/mid-level engineers on AI coding practices and secure AI-generated code validationOwn CI/CD pipelines, IaC, and automated testing; collaborate with DevOps on Terraform, CDK, or CloudFormation where applicable Key requirementsBachelor in Computer Science or related field; 5+ years of software developmentReactJS (frontend)TypeScriptNode.jssecure authenticationmonorepo managementpayments/rules engine