Yujun Zheng

Hi, I'm Yujun

A results-driven Software Engineer with over 4 years of comprehensive experience in software designing, development and testing.

Full Stack

Java, Python, JS

Data Systems

MySQL, Redis, Kafka

Cloud & DevOps

AWS, Docker, K8s

IoT & Hardware

Raspberry Pi, Arduino

About Me

Passionate about building scalable systems and solving complex problems through technology

My Journey

With a strong foundation in Computer Science, IoT, and Electrical Engineering, I've built a diverse skill set spanning full-stack development, test automation, and IoT systems. My experience ranges from working with billion-user systems at TikTok to developing innovative IoT solutions for smart homes.

I'm passionate about leveraging cutting-edge technologies to solve complex problems and drive business value. My expertise includes Java, Python, JavaScript, AWS, and various IoT platforms.

JavaPythonJavaScriptAWSDockerKubernetesReactSpring BootMySQLRedisKafkaMQTT

Education

Master of Science in Computer Science (Artificial Intelligence)

Georgia Institute of Technology

Online • Expected 2027

Master of Science in Cyber-Physical Systems

Northeastern University

Boston, MA • Dec 2021

Bachelor of Science in Information Engineering

Shanghai Jiao Tong University

Shanghai, China • July 2018

Professional Experience

Building scalable systems and delivering high-quality solutions across diverse industries

SDET II, Privacy & Security

TikTok

Sep 2024 - Feb 2025

San Jose, CA, US

  • Delivered high-quality assurance for big data systems serving 1 billion users
  • Developed Python-based test automation framework with 90% API coverage
  • Built demo services in Go for functional testing of Purpose Limitation SDK
  • Enhanced monitoring dashboards with real-time insights and anomaly detection
PythonGoRPCHTTPBig DataCI/CD

Full Stack Software Programmer

Marlabs LLC (IDEXX)

Feb 2023 - Aug 2024

Remote

  • Implemented user session management using Redis distributed storage
  • Built product and order management pages with Thymeleaf and AJAX
  • Optimized stock deduction efficiency using Redis atomic operations
  • Achieved 10x throughput increase through stress testing and optimization
JavaSpring BootRedisMySQLRabbitMQThymeleaf

Software Developer

RND4IMPACT Inc.

May 2022 - Feb 2023

Remote

  • Implemented end-to-end IoT solutions using Python and Java
  • Designed data management strategies with custom JSON formats
  • Integrated TLS and authentication mechanisms for IoT security
  • Developed MQTT and CoAP servers with cloud visualization
PythonJavaMQTTCoAPIoTMySQLTLS

Featured Projects

Innovative solutions spanning IoT, automation, and intelligent systems

Smart Home Control System

End-to-end IoT solution with MQTT/CoAP communication, TLS security, and cloud visualization.

  • Device-to-cloud communication
  • Real-time data visualization
  • Security integration
PythonJavaMQTTCoAPMySQLTLS

Intelligent Bicycle Suites

Complete AR helmet system with sensors, speed detection, and collision avoidance.

  • AR helmet display
  • Speed & cadence detection
  • Collision avoidance
C++PythonRaspberry PiArduinoBluetooth

Advanced Security System

Multi-modal recognition system with face, character, and marker detection capabilities.

  • Face recognition
  • Character recognition
  • Real-time processing
C++OpenCVDeep LearningNode.jsMySQL

Get In Touch

I'm always interested in new opportunities and exciting projects. Let's connect!