Jiarun Han
Solna
Summary
Master’s student in ICT Innovation (KTH & Aalto, EIT Digital) specializing in AI-driven system intelligence. Experienced in LLMs, AI agents, and Retrieval-Augmented Generation (RAG) with hands-on projects in LangGraph, LangChain, and LoRA fine-tuning. Skilled in Python, JavaScript, and full-stack prototyping (FastAPI, Gradio, Docker, PostgreSQL/pgvector). Passionate about applying explainable AI and autonomous Root Cause Analysis to complex telecom networks and future 6G systems.
Overview
1
1
year of professional experience
Work History
Intelligent Triage System (LangGraph-based)
Individual Project
05.2025 - 08.2025
- Designed a state-graph-driven dialogue workflow with dynamic routing, parallel tool execution, and improved response efficiency.
- Integrated LangGraph + PostgreSQL (pgvector) for dialogue state persistence, cross-session memory, and vector retrieval.
- Built a custom toolchain (retrieval, computation, etc.) and parallelized execution via thread pools.
- Deployed RAG capabilities with multi-turn query rewriting and document scoring, and provided an API (FastAPI) + WebUI (Gradio) with user/session management.
AI Evaluator & Senior Reviewer
Scale AI
10.2024 - 05.2025
- Participated in large-scale training of LLMs by evaluating and annotating Al-generated responses across diverse topics.
- Applied natural language understanding to assess output quality, coherence, and alignment with human intent.
- Followed detailed task guidelines and quality control standards to ensure high accuracy and consistency.
- Responsible for auditing and mentoring junior annotators, and ensuring task quality through detailed feedback.
Education
Master of Science - ICT Innovation
KTH Royal Institute of Technology
Stockholm06-2026
Bachelor of Science - Computer Science
Changchun University of Science And Technology
Changchun, China06-2024
Bachelor of Science - Robotics
Changchun University of Science And Technology
Changchun,China06-2022
Skills
- Python, JavaScript, FastAPI & Gradio, FastAPI & GradioPyTorch
- Parameter-Efficient Fine-tuning (LoRA, PEFT), Docker, HuggingFace, LangChain, LangGraph, RAG,
Timeline
Intelligent Triage System (LangGraph-based)
Individual Project
05.2025 - 08.2025
AI Evaluator & Senior Reviewer
Scale AI
10.2024 - 05.2025
Master of Science - ICT Innovation
KTH Royal Institute of Technology
Bachelor of Science - Computer Science
Changchun University of Science And Technology
Bachelor of Science - Robotics
Changchun University of Science And Technology
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