.NET Engineer - AI Tools (mid-level)

Paychex is reimagining how businesses manage their workforce by bringing payroll, HR, benefits, and advisory services together into a single connected HCM platform. As Paychex and Paycor come together, we're combining innovative technology, data-driven insights, AI, and human expertise to help organizations work smarter, support their people, and achieve better business outcomes. This is an exciting time to join our team as we continue to invest in innovation, simplify client experiences, and shape the future of work. At Paychex, you'll have the opportunity to grow your career, make a meaningful impact, and be part of something bigger as One Paychex.
Overview

As a Software Engineer II, you will develop new features and maintain existing cloud-native services within a modern software delivery platform — working across a .NET/ASP.NET Core API, a React front end, and/or Kubernetes-deployed services, closely with end-users, IT peers, and management.

Responsibilities

• Develop new applications and modify/maintain existing cloud-native solutions, working closely with end-users, IT peers, and management.
• Drive agentic development practices  across a modern AI software delivery platform
• Make changes to prevent recurrence of defects, modifying existing code and faulty files, writing and running tests to validate fixes.
• Troubleshoot, debug, and resolve application issues across development and production environments.
• Support CI/CD pipelines, containerized deployments, and application monitoring.
• Document new applications and changes made to existing applications.
• Participate in unit, integration, and business acceptance testing of the applications.
• Participate in code reviews and contribute to continuous improvement initiatives.
• Estimate development effort, contribute to technical discussions, and participate in Agile ceremonies.
• Do whatever is necessary to get to your team's definition of done.
• Stay current on emerging technologies, including AI-assisted development tooling.

Qualifications

• Bachelor's Degree in related field - Preferred.
• 2-5 years of experience with C# and .NET Core / .NET.
• Hands-on experience building ASP.NET Core Web APIs; familiarity with EF Core and LINQ preferred.
• Exposure to containerized services (Docker) and/or Kubernetes-based deployment is a plus.
  Working knowledge of PostgreSQL or another relational database, including basic query design and optimization.
• Some familiarity with front-end development (React/TypeScript) is a plus, given the platform's full-stack nature.
• Be able to describe the above in a logical software stack.
• Understanding of unit testing concepts and frameworks preferred.
• Ability to be self-directed. Strong problem-solving and communication skills.
• Familiar with an Agile environment.
• Familiar with Git, Azure DevOps/GitHub, and CI/CD pipelines.
• Familiarity using AI tools for development is a real plus — experience using AI coding assistants (e.g., GitHub Copilot) to accelerate day-to-day development.
• Participation and familiarity with open source projects is a plus.

Live the Paychex Values

Act with uncompromising integrity.

Provide outstanding service and build trusted relationships.

Drive innovation in our products and services and continually improve our processes.

Work in partnership and support each other.

Be personally accountable and deliver on commitments.

Treat each other with respect and dignity.

What's in it for you?

• A flexible work philosophy
• Generous paid time off 
• Company paid private health insurance
• Company paid life and disability insurance
• Paid leave for illness, birth parents, non-birth parents, elder caregivers, marriage, adoption of a child and bereavement
• Inclusive and accessible Employee Assistance Program (EAP) to help with everyday challenges
• Christmas and Easter bonuses
• Work-from-home allowance
• Opportunity for strengthening expertise and skills through Paychex’s learning platform, including lessons in English

Not sure if you meet every requirement?

At Paychex, we know that great talent comes in many forms. If you're passionate about the role but don't check every box, we still encourage you to apply. You might be the right fit - either for this position or another opportunity with us.

Paychex is an equal opportunity employer. We are committed to fostering a respectful and inclusive workplace where all individuals are treated fairly and evaluated based on their qualifications, experience, and merit. We comply with all applicable federal, state, and local laws prohibiting discrimination in employment.