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Zheng Wu

Junior Software Engineer specializing in backend systems and cloud messaging

Mountain View, CASoftware Engineer Fulltime1 years experienceJuniorSaaSEmail MarketingMedia & Entertainment
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About

Data/ML engineer who has owned end-to-end systems across email deliverability/segmentation and production LLM apps. Built a Spark+Airflow segmentation engine that materially improved deliverability (99.9%) and open rates (>50%), and shipped a PDF-to-quiz RAG product using LangChain/Vertex AI/Chroma with strong guardrails and an eval loop that cut hallucinations to <5%.

Experience

Software Engineer FulltimeParticle Media (Newsbreak)
Software Engineer, AI Engineer InternAffekta
Software Developer InternSkillUpIT

Education

Rice Universitymaster, Computer Science (2024)
Vanderbilt Universitybachelor, Computer Science & Applied Mathematics (2023)

Key Strengths

  • Owned and shipped multi-tenant email segmentation/automation with clear infra tradeoffs (hourly batch vs real-time) to control cost/complexity
  • Improved email performance metrics post-launch (bounce rate down ~15%, delivery rate to 99.9%, open rate from ~35% to >50%)
  • Production RAG pipeline from PDFs to quizzes with robust guardrails (caps, validation, JSON parsing + retries, dedupe/uniqueness checks)
  • Designed LLM eval loops spanning retrieval + generation metrics and human review; reduced hallucinations to <5% via chunking/prompt/grounding changes
  • Built reliable, scalable Spark/Airflow data pipelines with canonical schemas, idempotency, dedupe, and observability for messy SES/bounce artifacts

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Contact

candidate@example.com(555) 123-4567LinkedIn Profile
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Languages

English

Skills

PythonJavaJavaScriptTypeScriptSQLGoGolangCSSHTMLLuaCC++FlaskFastAPISpring Boot