Senior Software Engineer

Commerce + Ecosystems (C+E) is responsible for enabling and optimizing the end-to-end customer journey on the Microsoft Cloud. 

C+E’s Commerce Financial Platforms (CFP) team is responsible for Financial Platforms, Global Payments Platform (GPP), Employee Financial Experiences, and C+E Compliance, and also develops and operates financial commerce platforms and tools that perform all revenue management functions for our customers, partners, and staff worldwide.

Are you driven by the challenge of designing highly scalable distributed systems? Does securing customer transactions in a cloud-first environment motivate you? Are you ready to build reliable, secure, frictionless payment infrastructure that powers Microsoft’s billion-dollar businesses? If you're passionate about solving complex engineering problems and delivering impact through high-quality systems, we want you on our team.  

We are the engineering team within the Global Payments Platform (GPP) organization, a core platform in the Commerce and Ecosystem group at Microsoft. Our mission is to build and operate the backbone of Microsoft’s commerce capabilities, delivering seamless payment experiences, enforcing top-tier security and compliance, and ensuring high reliability and performance across global transactions. Our services support major Microsoft business units including Xbox, Office 365, Azure, Microsoft Store, and Edge, and are deployed in over 200 countries.  

As a Senior Software Engineer, you will design and develop cloud-native microservices, implement secure and compliant systems for managing customer payment methods, and solve challenges related to performance, availability, and scalability. You will collaborate across product, infrastructure, and security teams to deliver robust solutions, and contribute to intelligent fraud prevention and agentic product capabilities. This role requires technical depth, ownership mindset, and a drive to continuously modernize the payment stack using data-driven engineering and cloud technologies.  

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

• Reviews product code and test code to ensure it meets team standards, contains the correct test coverage, and is appropriate for the product or solution area. Brings insight to code reviews to help improve code quality, coaching and providing feedback to develop other engineers' skills. Conducts code reviews in a timely fashion that helps accelerate the pace of development on the team.
• Considers diagnosability, reliability, testability, and maintainability when reviewing code, and understands when code is ready to be shared or delivered. Applies and reviews for coding patterns, security risks, compliance issues, and best practices in code reviews, providing feedback on code to drive adherence to best practices. Uses automated source code analysis tools that are incorporated into the build/development process. 
• Independently creates a clear test strategy that ensures solution quality, prevents regression from being introduced into existing code. Ensures test plans incorporate security testing to validate security invariants (including negative cases). Drives additional new tests to cover gaps, deleting or fixing broken tests, and improving the speed, reliability, and defect localization of the test suite. Builds testable code and considers testability during design for a project/sub-section of a product/solution.
• Understands the different types of tests that can be done on a particular system (e.g., unit tests), maintains up-to-date understanding of testing architectures used both across Microsoft and across the industry, and applies them across the architecture as appropriate. Identifies difficult or untestable sections of codes for a project/sub-section of a product/solution for future design or rearchitecture discussions. Leverages artificial intelligence (AI) tools for test automation. 
• Applies best practices to build code based on well-established methods and secure design principles while also applying best practices for new code development and formal validation of security invariants. Drives product development and scaling to customer requirements and applies best practices for me