Senior full stack .Net Developer

FiservBerkeley Heights, NJ

About The Position

A successful Senior full stack .Net Developer at Fiserv designs builds and maintains high-quality applications that support business goals and client needs. You partner with cross-functional teams to translate requirements into scalable, reliable solutions across the stack. You raise engineering standards through mentoring, strong delivery practices, and responsible use of AI-assisted development tools.

Requirements

  • 10+ years of software development experience delivering production applications.
  • 6+ years of programming experience with C#/.NET
  • 3+ years of experience with SQL databases
  • 3+ years with AWS, Azure, or GCP services.
  • 3+ years of experience with CI/CD + DevOps
  • 3+ years working in Agile.

Nice To Haves

  • 2+ years of experience in financial services or payments technology.
  • 1+ year using AI-assisted development tools (for example, GitHub Copilot or ChatGPT Code Interpreter) to generate functions/classes, tests, and documentation.
  • 1+ year applying AI tools to improve code quality (for example, refactoring UI code, suggesting performance improvements, and establishing cleaner patterns across large .NET projects).

Responsibilities

  • Lead the design, development, and implementation of software applications to support Fiserv business goals.
  • Collaborate with cross-functional teams to gather requirements and translate them into technical specifications.
  • Perform coding, testing, and debugging to ensure optimal performance and reliability.
  • Maintain and improve existing codebases and lead peer review processes to strengthen quality and consistency.
  • Mentor junior developers and provide technical guidance, including leveraging AI tools (GitHub Copilot in Visual Studio or ChatGPT Code Interpreter) to accelerate .NET UI development, generate documentation/unit tests (for example, XML comments), and refactor for maintainability and performance.

Benefits

  • annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards
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