I’m an AI Engineer with 10 years across manufacturing, FMCG and enterprise IT, spanning software engineering, enterprise architecture and data engineering. I build production RAG and agentic LLM systems and take them from prototype through to live service.

Based in London / Essex, UK, and relocatable. I hold a UK Global Talent Visa, so I need no visa sponsorship.

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Experience

AI Consultant, LLM Engineering — Samsung SDS Europe, London

May 2026 – Present

  • Define enterprise AI architecture and technical direction, setting how GenAI services are designed, evaluated and deployed across CRM, e-commerce and marketing platforms.
  • Built the core RAG service on on-premise GPUs — a fine-tuned, 4-bit quantised open-weight model with Elasticsearch hybrid search (BM25 + vector KNN). Resolution time down 40%.
  • Added agentic tool calling for multi-step queries, with evaluation and monitoring in place before release: hallucination rate, retrieval precision, A/B tests.
  • Connected AI services to enterprise systems through MCP and internal APIs, giving agents controlled access to CRM and operational data.

Python · LLM · LangGraph · MCP · RAG · Elasticsearch · APIs · Cloud · LLMOps · CI/CD · SQL

Enterprise System Specialist / Data Engineer — Gerald McDonald, Essex

April 2024 – April 2026

  • Built a RAG/LLM service from prototype to production as sole engineer. Adopted by 50+ business users.
  • AWS Glue ETL into a Snowflake data warehouse, hybrid retrieval via LangChain, Streamlit front end. Also owned the security review and permission model.
  • Added document-processing workflows with tool calling for structured outputs. Manual review time down 60%.
  • LLMOps: prompt versioning, precision@k monitoring, regression tests in CI/CD.
  • Led the Dynamics 365 ERP/CRM migration, designing the hybrid on-premise and cloud architecture.

Python · LangChain · RAG · AWS (Glue, S3) · Snowflake · Dynamics 365 · LLMOps · CI/CD · Kubernetes

Software Engineer, DevOps & Big Data — MICUBE Solution, Seoul

September 2021 – July 2022

  • Kafka and Spark pipelines processing sensor data from factory production equipment.
  • Anomaly detection models flagging equipment faults before failure, cutting error rates and unplanned downtime.
  • Backend services in Java and C#, SQL tuning, and DevOps tooling on Airflow and Kubernetes.

Python · Java · C# · SQL · Kafka · Spark · Airflow · Kubernetes · Anomaly detection

Business Analyst / Project Leader — Taekwang, Gimhae

June 2016 – August 2020

  • Led a £4M MES/SCM programme across multiple manufacturing sites.
  • Redesigned planning and logistics processes for a 25% efficiency gain.
  • Oracle data models, PL/SQL, KPI dashboards and QA audits.

Oracle · PL/SQL · MES · SCM · Business process analysis

Skills

Generative AI & LLM engineering — RAG architecture · vector databases and hybrid search (BM25 + vector KNN) · agentic workflows and tool calling · LangChain · LangGraph · MCP · LLM fine-tuning · prompt engineering

MLOps & data engineering — LLMOps · evaluation frameworks (hallucination rate, precision@k) · model registry · A/B testing · CI/CD · monitoring · AWS (Glue, S3, SageMaker) · Azure · Snowflake · Kafka · Spark · Airflow · Terraform · ETL/ELT · data warehousing

Machine learning & analytics — PyTorch · TensorFlow · scikit-learn · anomaly detection · churn modelling

Software engineering & architecture — System design · APIs and microservices · distributed systems · enterprise integration (ERP/CRM) · hybrid cloud architecture · PoC-to-production ownership · stakeholder engagement · Agile · PRINCE2

Languages & platforms — Python · SQL · Java · C# · Go · TypeScript · Docker · Kubernetes · Git · Dynamics 365

Education

  • MSc Data Science — University of Glasgow, UK (2022 – 2023)
  • BSc Computer Science — Korea National Open University (2020 – 2022)
  • BBA Business Administration — Ajou University, Korea (2013 – 2015)
  • Seoul Institute of the Arts — Film

Other training

  • Big data analysis with Python and R
  • GYBM (Global Young Business Manager), 5th cohort

Certifications

  • Microsoft Certified: Azure Data Engineer Associate (DP-203)
  • Microsoft Certified: Power BI Data Analyst Associate (PL-300)
  • PRINCE2 Foundation
  • TensorFlow Developer Certificate

TensorFlow Developer Certificate

Languages

  • Korean (native)
  • English (fluent)
  • Vietnamese (fluent)