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PENNYMAC Logo

Sr Full Stack Developer

PENNYMAC

$90,000 - $150,000
Nov 12, 2025
Westlake Village, CA, US
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Pennymac is looking to design, develop, and maintain web applications using a variety of technologies to support their mortgage platform and integrated business.

Requirements

  • Proven experience as a Full Stack Developer with strong front-end and back-end skills.
  • Node.JS experience preferred, including API design, database schema, authentication, and concurrency management.
  • Strong proficiency in building responsive web applications that match design specifications.
  • Experience with version control systems such as GitLab or GitHub.
  • Excellent problem-solving and analytical skills with attention to both security and user experience.
  • Experience using AI coding tools (e.g., Copilot, Cursor).
  • Familiarity with Ruby on Rails, Jekyll, TypeScript, or Python.

Responsibilities

  • Design, develop, and maintain web applications using React, Ruby on Rails, Node.JS, HTML, CSS/SASS, JavaScript, Bootstrap, SQL, and related technologies.
  • Build responsive, pixel-perfect web pages from design mockups.
  • Write clean, secure, and efficient code following best practices and standards.
  • Collaborate with product and design teams to translate business needs into technical solutions.
  • Participate in code reviews to ensure quality and security across the application stack.
  • Troubleshoot complex technical issues with a focus on performance and security.
  • Identify opportunities to improve processes, systems, and the overall user experience.

Other

  • Mentor junior developers and foster a culture of user-focused, secure development.
  • Strong communication skills and ability to work independently in an agile team.
  • Knowledge of web accessibility standards (WCAG).
  • Accountable, Reliable and Ethical in all that we do.
  • Fostering an equitable and inclusive environment, where all employees and customers feel valued, respected and supported.