Zefan Sun

About Zefan Sun

I’m a Master’s student in Computer Science at Northeastern University (GPA 4.0), with prior industry experience as a Software Engineer at Mindray. I have a strong background in backend and distributed systems, and hands-on experience building scalable systems using Java, Spring Boot, Kafka, AWS, and Docker.I enjoy working on system design, data processing pipelines, and performance optimization, and I’m comfortable across the full development lifecycle—from design and implementation to deployment and monitoring.I’m currently seeking 2026 Summer and Fall Software Development Engineer (SDE) internship opportunities, and I’m excited to learn, build, and contribute to impactful engineering teams.

Experience

1. Software Engineer Intern

   Microsoft

   Apr 2026 — Present

   Designed and implemented backend services for AI-powered applications, integrating large language models (LLMs) via Azure OpenAI APIs • Built and optimized scalable APIs and microservices to support intelligent agent workflows and real-time user interactions • Developed data pipelines for processing and analyzing model inputs/outputs, improving system reliability and response quality • Implemented retrieval-augmented generation (RAG) workflows using vector search and embedding techniques • Collaborated with cross-functional teams (PMs, designers, and engineers) to deliver end-to-end features in an agile environment • Improved system performance through caching, batching, and latency optimization strategies

Education

• Northeastern University

  Master of Science - MS, Computer Science

• Tianjin University

  Bachelor of Engineering, Bioengineering and Biomedical Engineering