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Principal Software Engineer

Microsoft· Software Engineering
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Redmond, WA$142.8k - $274.8kfull-timePosted 4w ago

About the role

Principal Software Engineer on the EPICS team to build LLM-powered agents that translate engineering intent into tested, reviewable changes. Hands-on in design, coding, and debugging while shaping technical direction across teams. Focus on reliable, secure agentic workflows in day-to-day engineering.

Responsibilities

  • Build agents that carry authorized work from intent and design through implementation, test execution, code review, and remediation. Produce pull requests with attributable changes and evidence of what was checked, what passed, and what still needs review.
  • Design orchestration, tool interfaces, and context retrieval around real repositories, build and test systems, and CI pipelines. Use durable state and explicit ownership so interrupted work can resume and handoffs are recoverable.
  • Create LLM and agent evaluations and regression tests grounded in engineering tasks. Debug failures across models, prompts, context, and tools; use results to qualify changes and balance quality, reliability, latency, and cost.
  • Build secure, bounded execution with scoped permissions, explicit approval for privileged actions, and human review before changes are accepted. Make agent actions observable and attributable, with clear stop conditions when authorization or evidence is insufficient.
  • Deliver across teams from early validation to adoption. Align interfaces, dependencies, and ownership; learn from engineers using the workflows, compare against meaningful baselines, and connect usage to verified productivity and quality outcomes.
  • Set technical direction and turn ambiguous problems into achievable milestones. Write and review high-quality code and tests, simplify architecture, and mentor engineers through design, debugging, and delivery.

Qualifications

  • Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python - OR equivalent experience.

Skills

Required:Programming in C, C++, C#, Java, JavaScript, or Python
Nice to have:AI-powered agents / LLM integrationDistributed systems / cloud servicesAutomated testing and code review
Last updated Sep 24, 2026. Interested? Apply on the company site.

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