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GN G. M. Nguegnang
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AI Engineering & Agentic AI

Agentic systems and retrieval

6 projects covering production deployment, model alignment, retrieval research, and frontier model consulting. Each one ends in a number, a commit, or a live URL. Open a project for the full case study.

  • Multi-agent · deployed

    Agentic ERP supply-chain copilot

    Live

    A planner asks a supply question in plain English. The system does the arithmetic exactly rather than guessing at it, and stops for a manager on anything above $10,000.

    98% injection-resistance · 168 tests · 10 business intents

    A LangGraph agent routes the question to 1 of 7 exact solvers (OR-Tools, CVXPY, SciPy) and a pgvector CRAG pipeline. A Redis-backed human gate holds high-cost decisions, and 6 FastMCP typed contracts stand between the model and anything that executes.

    • LangGraph
    • FastMCP
    • Neo4j
    • pgvector
    • OR-Tools
    • Azure AKS
    • Bicep
    View case study →
    ERP development repo ↗ERP copilot, live demo ↗
  • Cloud deployment · production

    Agentic ERP: deployment infrastructure

    AKS · Bicep IaC

    The pipeline that puts the copilot on live infrastructure, plus the 6 checks that have to pass before any release reaches a user.

    Bicep IaC · Kustomize overlays · 6-check smoke test · OTel

    Bicep provisions AKS, ACR, Postgres, Redis, CosmosDB, and Azure Monitor. Kustomize overlays keep staging and production apart without duplicating a manifest, and a production deploy waits for manual approval.

    • Azure AKS
    • Bicep
    • Kustomize
    • GitHub Actions
    • OTel
    • NGINX
    View case study →
    ERP deployment repo ↗
  • Model alignment research · SFT + DPO

    Financial QA alignment via SFT, RLAIF, and DPO

    Llama-3-8B · FinQA

    Teaching a model to read a company's financial tables and show its working, so an analyst can check the number instead of trusting it.

    SFT loss 2.74 → 0.785 · DPO reward accuracy 97.7%

    A three-stage pipeline on Llama-3-8B: supervised fine-tuning with chain-of-thought annotation, 1,800 preference pairs labeled by a second model, then DPO under 4-bit quantization. A third model judges the results, so no model grades its own work.

    • Llama-3-8B
    • LoRA / QLoRA
    • SFT
    • DPO
    • RLAIF
    • TRL
    • FinQA
    View case study →
    FinQA alignment repo ↗
  • Production RAG · deployed

    RAG chatboard for scientific QA

    Ask a question about a body of research papers and get an answer with its sources attached. It runs from a single command, on an ordinary laptop.

    ALCE Citation Precision 0.84 · 47,810 indexed chunks

    FastAPI and Chainlit in a two-service Docker Compose stack, published to GHCR on every push. There is no Python environment to set up and no index to download by hand.

    • FastAPI
    • Chainlit
    • SPECTER2
    • ColBERT v2
    • CRAG
    • Docker
    • GHCR
    View case study →
    RAG chatboard deployment repo ↗RAG chatboard research repo ↗
  • Retrieval research · ongoing

    Four-stage hybrid RAG pipeline for scientific QA

    QASPER benchmark

    The research behind that chatboard: how to find the one relevant passage among 47,810, and when to admit there isn't one rather than inventing an answer.

    ALCE 0.8373 · Faithfulness 0.7150 · 84 QASPER questions

    SPECTER2 and BM25 retrieval fused with RRF, ColBERT v2 reranking, a calibrated CRAG gate, and Llama-3.1-8B generation with inline citations. One fix to answer extraction took ALCE Recall from 0.057 to 0.84.

    • SPECTER2
    • BM25
    • ColBERT v2
    • CRAG
    • HyDE
    • vLLM
    • RAGAS
    View case study →
    Hybrid RAG research repo ↗
  • Frontier model alignment · active consulting

    Agentic AI and post-training strategies

    Making frontier models better at hard science problems, and designing the scoring so the improvement can be measured rather than asserted.

    RLHF · RLVR · Rubric criteria · Chain-of-Thought

    RLVR where the answer is objective, RLHF where it is not, and rubric criteria in between for graded scoring. Plus agent trajectory analysis and the preference datasets that feed SFT and DPO.

    • RLHF
    • RLVR
    • SFT
    • DPO
    • Chain-of-Thought
    • Rubric evaluation
    View case study →
ML engineering and deep learning Research and publications

Get in touch

Open to AI Research Scientist, Applied Scientist, ML Engineer, and GenAI Engineer roles in Germany.

Email me at gmnguegnang@gmail.com
GN

AI Research Scientist & AI/ML Engineer

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