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whitesungun876/README.md

Hi, I'm Jieyu (Alice) Lian

Applied AI engineer with foundations in data engineering and machine learning.

Portfolio · LinkedIn · All projects

I hold an M.Sc. in IT & Cognition from the University of Copenhagen. My work spans data ingestion and processing, feature engineering, model evaluation, and LLM applications built around retrieval and tools. I focus on making results traceable and testing where systems fail.

I'm eager to learn, quick to adapt, and resilient in competitive environments. I work well both independently and as part of a team.

Open to Applied AI, AI Solutions, and AI product engineering roles.

Selected projects

Project Engineering focus Explore
RAGOps Lens RAG retrieval, evaluation, confidence gating and observability with FastAPI, pgvector and Qdrant. Architecture and evaluation
GitHub Opportunity Miner LangGraph + FastAPI + Next.js agent turning GitHub evidence into source-linked opportunity cards and validation plans. Workflow and demos
Fund Facts Cross-Check Two-model comparison with structured outputs, citation checks and regression evals. Separates agreement from evidence support. Video demo · Eval report
AML Transaction Review XGBoost transaction ranking, temporal validation and review-budget evaluation; Databricks batch scoring with MLflow and Delta. Experiment · Acceptance evidence
DeviceCare Decision Benchmark Reproducible comparison of two models for device-support routing, with policy checks, repeated runs and documented review limits. Report
M.Sc. Thesis: Retrieval and Agent Utility Research on experience retrieval for an LLM agent, with frozen results, analysis and reproduction checks. Results and verification

These repositories include prototypes, benchmarks and research. AML, DeviceCare and Fund Facts use synthetic data; opportunity cards are hypotheses, not evidence of customer demand. Repository READMEs document evaluation boundaries and AI assistance where applicable.

Data engineering and ML foundations

Tools I use

  • Data & ML: Python · SQL · scikit-learn · XGBoost · MLflow · Databricks / Delta
  • AI applications: RAG · LangGraph · structured outputs · citation validation · regression evals
  • Delivery: FastAPI · PostgreSQL · pgvector / Qdrant · Docker · Azure · TypeScript / Next.js

Browse the full project index →

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  1. RAGOps-Lens RAGOps-Lens Public

    Production-style RAG evaluation platform with retriever comparison, confidence gating, SQL analytics, and Azure observability.

    Python

  2. Opportunity-Mining-Agent Opportunity-Mining-Agent Public

    Evidence-first AI agent that mines GitHub issues for validated product opportunities and buyer hypotheses.

    Python 17 1

  3. aml-transaction-review aml-transaction-review Public

    Synthetic AML transaction ranking, temporal validation and Databricks batch MLOps portfolio

    Python

  4. devicecare-decision-benchmark devicecare-decision-benchmark Public

    Reproducible evaluation of Jev and GPT-4.1 mini for device-support routing: synthetic cases, redacted decisions, and an offline demo.

    Python

  5. fund-facts-cross-check fund-facts-cross-check Public

    Two-model fund fact cross-checking with strict schemas, source-grounded citations, and regression evals.

    Python

  6. retrieval-alignment-realised-utility retrieval-alignment-realised-utility Public

    Reproducible MSc thesis materials on experience retrieval for an LLM agent in TextWorldExpress CookingWorld.

    Python