Full-stack .Net Developer

Fiserv • Berkeley Heights, NJ

20h

About The Position

Calling all innovators - find your future at Fiserv. We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv. Job Title Full-stack .Net Developer What does a successful full stack .Net developer do at Fiserv? A successful full stack .Net Developer at Fiserv designs, builds, and supports secure, high-quality applications that align to business goals and client needs. You work end-to-end across modern UI and scalable backend services, partnering with cross-functional teams to translate requirements into reliable solutions. You improve delivery speed and code quality by applying CI/CD, Agile practices, and AI-assisted development tools responsibly.

Requirements

• 6+ years of software development experience delivering production applications.
• 6+ years of backend development experience with .NET/C#.
• 4+ years of modern front-end development with JavaScript (React preferred) and 2+ years with CI/CD + DevOps practices.
• 2+ years working in Agile teams.

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, tests, and documentation.
• 1+ year applying AI tools to improve code quality (for example, refactoring suggestions, performance improvements, and establishing cleaner UI patterns across large .NET projects)

Responsibilities

• Lead the design, development, and implementation of full-stack software solutions that support Fiserv business goals and client outcomes.
• Collaborate with cross-functional partners to gather requirements and convert them into clear technical specifications and delivery plans.
• Perform hands-on coding, testing, and debugging to ensure application performance, stability, and maintainability across front end and backend components.
• Maintain and enhance existing codebases, drive peer reviews, and raise engineering standards through clean patterns and continuous improvement.
• Mentor junior developers and provide technical guidance, including effective use of AI coding tools (for example, using GitHub Copilot in Visual Studio to accelerate .NET UI development, generate documentation/tests, and refactor for maintainability).

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed