Sr Software Engineer

Overview

McKesson is an impact‑driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well‑being of you and those we serve – we care.

What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patients, our communities, and our people. If you want to be part of tomorrow’s health today, we want to hear from you.

As a P4 Senior Software Engineer you will help redesign and rebuild our next‑generation platform on a modern cloud‑native technology stack. You will work closely with architects, staff engineers, product, and quality engineering to build secure, scalable, and resilient services. As a senior engineer, you will not only contribute hands‑on to the codebase but also provide technical leadership for your team, mentor other engineers, and help define the engineering practices that enable us to deliver high‑quality solutions at velocity.

Primary

Skills:

C# / .NET, Type Script, React, Postgres, RESTful APIs / GraphQL

Secondary

Skills:

Kafka, Git/version control, Terraform, CI/CD pipelines, Unit testing frameworks (xUnit, Jest)

Nice to Have: Azure cloud platform, Redis, Microservices architecture, MFE Architecture

AI & Tooling: Experience using AI‑assisted development, testing, and observability tools (e.g., code generation, test generation, static analysis, performance analysis) and a willingness to help the team adopt these tools effectively.

• Design, develop, and maintain complex web services, APIs, and background jobs for the platform using C# and Type Script.
• Lead the technical design for features and services, collaborating with architects and staff engineers to ensure solutions align with target architecture and non‑functional requirements.
• Own the quality, reliability, and operability of the services you and your team build, including unit tests, integration tests, performance considerations, and production support.
• Guide the team in building event‑driven and microservice‑based architectures using Kafka and other cloud services.
• Influence and improve engineering practices, coding standards, code review quality, and CI/CD pipelines across your team.
• Use AI‑assisted tools and automation to improve developer productivity, test coverage, and code quality, and help others on the team do the same.
• Partner with product managers and stakeholders to break down work into small, testable increments and help maintain a healthy, well‑groomed backlog.
• Mentor and coach P3 and early‑career engineers, providing feedback and support to help them grow.

Typically 6+ years of experience in back‑end or full‑stack software development, including ownership of complex features or services in production.

• Typically 6+ years of experience in back‑end or full‑stack software development, including ownership of complex features or services in production.
• Strong hands‑on experience with C#/.NET and JavaScript/Type Script in production environments.
• Deep understanding of RESTful API design and practical experience with Graph
  
  QL‑based APIs.
• Strong experience with relational databases (Postgre
  
  SQL preferred), including schema design, query optimization, and performance troubleshooting.
• Hands‑on experience building or maintaining microservice or event‑driven architectures using messaging technologies such as Kafka.
• Proven experience designing and maintaining unit, integration, and component tests as part of CI/CD pipelines.
• Experience operating services in production, including monitoring, logging, alerting, and incident response.
• Comfortable working with Git, trunk‑based development or similar branching strategies, and modern CI/CD and Dev Ops practices.

• Experience with React or other modern front‑end frameworks, and comfort working across the stack when needed.
• Experience with Mule Soft or other integration platforms.
• Experience designing and implementing…