Junfeng Jin

EDUCATION
=========

Carnegie Mellon University   (Aug 2023 - Dec 2024)
M.S., Mobile and IoT Engineering

Beijing University of Posts and Telecommunications   (Aug 2019 - Jun 2023)
B.E., Telecommunications Engineering with Management

Queen Mary University of London   (Aug 2019 - Jun 2023)
B.E., Telecommunications Engineering with Management (First-class)

EXPERIENCE
==========

Google — Machine Learning Engineer   (Apr 2025 - Present)
  - Trained distilled models on zero-ground-truth events to fix overprediction.
  - Cut training delay with synthetic labels and auxiliary towers.
  - Built end-to-end user signal pipeline from ad request to serving.

ByteDance — Software Engineer   (May 2024 - Apr 2025)
  - Launched Customer Service Agent for 20,000+ shops in 8 markets.
  - Built Graph RAG on Neo4j with multi-agent automation.
  - Designed Intention Router and memory layer for 5+ teams.
  - Merged 30+ microservices into a Python framework; latency -40%.

Alibaba Cloud — Software Engineer Intern   (Jun 2023 - Aug 2023)
  - Built Java/gRPC microservices for a console with 80K DAU.
  - Shipped Spring Boot + MySQL backend; launch effort -70%.
  - Designed Java/GraphQL BFF layer; request efficiency +30%.
  - Built React/TypeScript/Redux frontend.

DeepLang AI — Software Engineer Intern   (Nov 2022 - Mar 2023)
  - Scaled Django/PostgreSQL on AWS to 200K+ MAU.
  - Extended Amazon EMR for big data; cloud cost -38%.

PROJECTS
========

Raily Friends — Personal Project   (2025)
https://raily.lawted.tech
  - Shipped highway-matching MVP in 8 hours, concept to prod.

Raily Friends  (https://raily.lawted.tech)
Highway-matching MVP shipped in 8 hours.

cv.ha7ch.com/junfengj