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Sr Application Developer

Job in Westlake Village, Los Angeles County, California, 91361, USA
Listing for: PENNYMAC TPO
Full Time position
Listed on 2026-01-12
Job specializations:
  • Software Development
    Software Engineer, Backend Developer, Senior Developer, Cloud Engineer - Software
Salary/Wage Range or Industry Benchmark: 90000 - 150000 USD Yearly USD 90000.00 150000.00 YEAR
Job Description & How to Apply Below

Job Overview

Senior Application Developer (C#, SQL Server, AI-Accelerated, AWS Cloud) will design, develop, and maintain high-performance enterprise applications, leveraging AI-powered tools and AWS services to accelerate delivery and quality.

Core Responsibilities
  • Use AI tools like Cursor and Git Hub Copilot for rapid prototyping, intelligent code completion, refactoring, and generating unit tests.
  • Design, develop, and maintain C#/.NET (Core/Framework) services and applications, specializing in back-end logic, APIs (e.g., ASP.NET Web API), and enterprise solutions.
  • Develop, optimize, and tune high-performance SQL Server stored procedures, functions, and complex queries; analyze existing SQL code for performance bottlenecks and security vulnerabilities.
  • Integrate applications with key AWS services: SQS for decoupling microservices, SES for transactional emails, S3 for object storage and static content hosting.
  • Enforce high standards of unit testing, maintain required code coverage, integrate coverage analysis into CI/CD pipeline; employ BDD and TDD techniques, using AI-assisted tools.
  • Manage small development projects independently, contribute as a senior team member on larger initiatives under Agile Methodologies; prepare, configure, and automate deployments to various environments, including production; provide technical support for escalated issues.
  • Demonstrate professional behaviors and growth mindset aligned with organization values.
What You’ll Bring
  • Bachelor’s degree or equivalent experience.
  • 5+ years of relevant work experience.
  • Knowledge of Agile Methodologies (XP, Scrum).
  • Experience with relational databases (MySQL, Postgre

    SQL, SQL Server).
  • Knowledge of design patterns, refactoring, and unit testing.
  • Experience with Linux and open source software.
  • Financial services experience, especially mortgages and mortgage-backed securities, is desirable.
Benefits
  • Comprehensive Medical, Dental, Vision.
  • Paid Time Off: vacation, holidays, illness, parental leave.
  • Wellness programs, employee recognition, onsite gyms.
  • Retirement benefits, life insurance, 401(k) match, tuition reimbursement.
  • Philanthropy programs, matching gifts, volunteer grants.
Compensation

$90,000 - $150,000. Salary varies by role, location, skills, and experience. Eligible for performance-based compensation and/or stock-based incentives.

Work Model

OFFICE

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