Available for opportunities

AI Engineer

Jiarun
Han

Architecting multi-agent systems
that reason, collaborate, and ship.

JH
Currently —

Thesis intern at Ericsson, designing a multi-agent reasoning framework that integrates ontology-driven knowledge graphs for reliable, explainable decision-making in enterprise settings. Building specialized agent teams that ingest, validate, and reason over heterogeneous knowledge sources in Neo4j.

I'm an AI Engineer specializing in multi-agent systems, knowledge graphs, and LLM pipelines — with hands-on experience at Ericsson and Scale AI.

I care about the gap between a working demo and a trustworthy system — clean agent orchestration, explainable outputs, and architectures that hold up when real data hits them.

0 Years Experience
0 LLM Tasks Audited / Week
0 Quality Compliance
01/2026 — 06/2026 Thesis Intern

Ericsson

Master Thesis Intern — AI & Multi-Agent Systems

Designing and evaluating a framework that integrates ontology-driven knowledge graphs with multi-agent reasoning for reliable decision-making in enterprise settings. Built specialized agent teams (ingestion, validation, conflict detection, planning, auditing) that collaborate to reason over a Neo4j knowledge graph and reduce human intervention. Evaluated the system on an infrastructure planning case study in terms of reliability, explainability, and automation.

Multi-AgentKnowledge GraphNeo4jOntologyLangGraphExplainable AI
05/2025 — 08/2025 Internship

University of Chinese Academy of Sciences

AI Engineer Intern

Prototyped a LangGraph-based multi-agent framework with role-like orchestration for dynamic dialogue routing. Integrated multi-source data (logs, documents, KPIs) to support RCA-like troubleshooting. Applied RAG-based reasoning with query rewriting, embedding retrieval, and document scoring to improve explainability. Delivered a prototype with FastAPI + Gradio WebUI supporting user registration, session management, and historical conversation loading.

LangGraphRAGFastAPIGradiopgvector
10/2024 — 05/2025 Part-time

Scale AI

AI Evaluator & Senior Reviewer

Led evaluation and training of LLMs across annotation tasks including model ranking, instruction tuning, and prompt refinement. Audited 100+ tasks weekly maintaining >95% quality compliance while mentoring junior annotators. Developed expertise in prompt engineering, LLM reasoning strategies, and applied generative AI. Achieved Coding T2 Certification in advanced LLM reasoning.

LLM EvaluationPrompt EngineeringInstruction TuningRAG
09/2024 — 06/2026 Degree

KTH Royal Institute of Technology

M.Sc. ICT Innovation · Stockholm, Sweden

Specializing in multi-agent AI orchestration and distributed reasoning.

Multi-Agent SystemsLLMExplainable AI
09/2024 — 06/2026 Degree

Aalto University

M.Sc. ICT Innovation · Helsinki, Finland

Joint degree programme with KTH. Coursework at Aalto covering advanced topics in distributed systems and AI-driven network intelligence.

Distributed SystemsNetwork IntelligenceAI
09/2018 — 06/2024 Degree

Changchun University of Science and Technology

B.Eng. Robotics & B.Sc. Computer Science · China

Dual degree in Robotics Engineering and Computer Science. Built strong foundations in systems programming, machine learning, and autonomous systems.

RoboticsComputer ScienceMachine Learning
01
Multi-Agent · LangGraph · RAG

Intelligent Triage System

LangGraph-based multi-agent framework with role-like orchestration for dynamic dialogue routing. Integrates multi-source data (logs, documents, KPIs) for RCA-like troubleshooting with RAG-based explainability.

LangGraphFastAPIGradiopgvectorDocker
02
LLM Evaluation · Prompt Engineering

LLM Evaluation Pipeline

Designed and refined evaluation workflows for large language models at Scale AI, focusing on coherence, factual accuracy, and collaborative reasoning. Audited 100+ tasks weekly at >95% quality compliance.

LLM APIsPrompt EngineeringRAGInstruction Tuning
03
Telecom AI · Multi-Agent

Multi-Agent Telecom Architecture

Designed and evaluated multi-agent architectures for telecom applications, focusing on structured communication protocols, adaptive task allocation, and contextual collaboration between specialized agents.

LangGraphHuggingFacePyTorchAWS Bedrock
Core Proficient Familiar

AI / Multi-Agent

  • LangGraph
  • Multi-Agent Frameworks
  • RAG Pipelines
  • LLM Evaluation
  • Prompt Engineering
  • LoRA / PEFT

Frameworks

  • PyTorch
  • HuggingFace
  • FastAPI
  • Gradio
  • LangChain
  • Docker

Data & Infrastructure

  • pgvector
  • Embedding & Retrieval
  • AWS Bedrock
  • Google Cloud
  • Alibaba Bailian
  • SQL

Languages & Domain

  • Python
  • JavaScript
  • Explainable AI
  • Knowledge Graphs

Let's build something
together.

Open to full-time roles and internship opportunities in AI, multi-agent systems, and LLM engineering.

Get in Touch