Kun Lei

AI Full-Stack Product Engineer · FDE Opportunities

Shanghai / Shenzhen / Suzhou · Currently employed; start date negotiable

Microsoft engineer shipping AI products across UX, services, prompts and evaluation. Experienced in rapid prototypes and reusable tooling; open to direct-hire FDE opportunities.

Work Experience

Microsoft

2021.02 – Present

Software Engineer 2 (since 2022.09) · M365 Copilot Data Connectors (2026); MSN Finance & Community (2021–2025).

eBay China Center of Excellence

2020.05 – 2021.01

Software Engineer · React/TypeScript, Java/Spring marketing analytics; Jenkins, Docker and API tests.

Shanghai Zongyi Automation

2018.11 – 2020.04

Development Team Leader · Led five engineers on computer vision and Python/Flask model services.

Selected Engineering Impact

Financial AI Features: UX to Services

2025–2026

Independently shipped stock/index/currency price-movement summaries across frontend, services and prompts; integrated live earnings-call audio/video into the earnings hub.
Built the operational financial fact-checking evaluator and end-to-end LLM evaluation experience, covering UX, backend integration, prompts and data processing.

Rapid Prototyping & Prompt Iteration Tools

2024–2025

Built a full-stack prompt tool covering three finance and three sports scenarios; PMs and engineers saved 100+ templates. Prototyped a Python finance backend in two days for live and batch requests.
Shipped an Agent prompt tool in one week for five teammates; led financial-summary coordination, cross-market tuning and side-by-side evaluation.

Enterprise Connectors & Reusable Product UX

2026

Migrated two Confluence connectors; traced authentication-label limits to shared infrastructure and proposed a platform fix.
Built reusable admin components and help/localization for 100+ connectors; fixed 10+ UX bugs and created 10+ Claude Skills for PR preparation and development.

Scalable Product Pipelines & Operations

2022–2023

Implemented an AIGC poll pipeline for 10K+ trending articles daily; shipped the poll UX reaching 100K+ consumption DAU, integrated AI writing and added error monitoring.
Built configuration-driven notification controls, reducing rollout changes from one day to one hour; built dashboards reducing data latency from two days to five minutes.

leikunx-website · Full-Stack Products & Operations

Personal project

Run Bun chat and paper tasks; deploy React/Nginx with selective releases, health checks and rollback.
Expose task stages and structured research results; retain browser-owned chat history and support user-supplied API keys without a persistent server chat store.

Education

Xiamen University · BEng, Software Engineering

2013.09 – 2018.07

Skills & Public Work

TypeScript/React/Redux, Python/Flask, Java/Spring; API integration, LLM prompts, evaluation and rapid product prototypes.

Jenkins CI/CD, Docker, Linux, logging/monitoring, frontend performance and testing; Claude Skills and AI-assisted delivery.

GitHub: https://github.com/leikunx

Portfolio: https://www.leikunx.com/