Microsoft
Senior Software Engineer
$120K–$261K
Redmond, WA · On-site · Senior · Full-time · Posted Oct 28, 2026
- Experience
- 4+ years; preferred pathways include a master’s degree and 4+ years, or a bachelor’s degree and 6+ years; equivalent experience is accepted.
- Education
- Bachelor’s Degree in Computer Science or related technical field, or equivalent experience.
About the job
Build and operate scalable backend systems for long-running agents and multi-model experiences in Microsoft 365 Copilot, including evaluation and production reliability.
What you'll do
- Architect, implement, ship, and operate distributed backend services for agentic and multi-model Copilot experiences.
- Use evaluations, benchmarks, and experimentation to measure performance and guide product and release decisions.
- Mentor engineers and promote engineering best practices and responsible AI-assisted development.
What they ask for
- Bachelor’s Degree in Computer Science or related technical field and 4+ years of technical engineering experience coding in a listed language, or equivalent experience.
- Ability to meet Microsoft, customer, and/or government security screening requirements, including the Microsoft Cloud Background Check.
Nice to have
- Experience building large-scale distributed systems or production AI systems using LLMs, RAG, agent orchestration, tool integration, or model gateways.
- Experience with AI evaluation, prompt management, Responsible AI, or modern agentic engineering practices.
Pay
USD $119,800 - $234,700 per year (base salary); USD $160,200 - $261,000 per year (base salary)
Tools
C, C++, C#, Java, JavaScript, Python, Microsoft 365 Copilot
AI focus
Build long-running agentic capabilities and multi-model experiences; develop production AI systems and evaluations, and champion responsible AI-assisted and agentic engineering.
Model-written summary · the original posting is authoritative