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October 17, 2025

Senior Software Engineer

Senior • On-site

$119,800 - $234,700/yr

Redmond, WA

Overview

The M365 Copilot App Platform team is the team that provides the platform APIs, infrastructure and backend web server for the Microsoft 365 Copilot app (https://m365.cloud.microsoft). All partner teams have built their AI-enabled experiences on our platform and depend on us for their success. Our team is responsible for the entire technology stack, including application code, platform APIs, deployment pipelines, infrastructure, backend web server, and middle-tier services that support the application across web, Windows, and Mac environments. 
 

We are seeking a highly skilled and motivated Senior Software Engineer to join our middle-tier service team within the M365 Copilot App Platform team. This team is responsible for providing the middle-tier service for Microsoft 365 Copilot web, Windows, and Mac apps which all build AI-enabled experiences within the application depend on. As a Senior Software Engineer, you will play a crucial role in developing and maintaining the middle-tier service code, deployment pipelines, and infrastructure. You will ensure the reliability, scalability, and security of the middle-tier service. The role focuses on designing, implementing and maintaining service infrastructure, automation, and operational excellence. You will work in a fast-paced agile environment, collaborating with cross-functional teams to enable the M365 Copilot app and drive innovation. If you are passionate about AI and services and have a strong technical background, this is an excellent opportunity to make a significant impact. 

In this role, you will work closely with partner teams to build new additional capabilities into our platform. You will also work to help improve the application's performance and quality. The M365 Copilot App is a key component in our strategy to compete with ChatGPT, making this position critical to our success. 

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.

Qualifications

Required Qualifications:

  • Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
    • OR equivalent experience.
  • 4+ years of software engineering working on web services including, but not limited to, C#/ASP.Net, node.js, or equivalent.

Other Requirements:

Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:

  • Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.
Preferred Qualifications:
  • Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C#, JavaScript or Typescript
    • OR Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, but not limited to, C#, JavaScript or Typescript
    • OR equivalent experience.
  • 2+ years experience with client app development using Typescript.
  • Motivated and self-driven possessing solid cross-team communication and partnership skills.
  • Creativity, insightfulness, and sensitivity for a dynamic approach to problem solving.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: https://careers.microsoft.com/us/en/us-corporate-pay

 

The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $158,400 - $258,000 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: https://careers.microsoft.com/us/en/us-corporate-pay

 

Microsoft will accept applications for the role until October 20th, 2025

 

#copilot #m365 #m365copilot #ai

Responsibilities

  • Lead the design and implementation of new middle-tier features working with architects and other individual contributors.
  • Develop and maintain the middle-tier, APIs, deployment pipelines, and infrastructure.
  • Collaborate with cross-functional teams to enable the M365 Copilot app and drive innovation.
  • Work closely with partner teams to build new additional capabilities into our application.
  • Design, produce and deliver software to improve reliability, scalability, performance, security, efficiency, etc.
  • Opportunity for full-stack development work that spans our client app and middle-tier services.
  • Design and improve deployment, monitoring and recovery processes 
  • Apply metric-driven approach to improve service quality and reduce customer-impacting incidents 
  • Monitor and maintain health of distributed services for high availability and resiliency 
  • Partner with product and platform teams to align service architecture with business goals and other Microsoft services 
  • Collaborate with software engineers to integrate reliability best practices into product design