Yichen Liu
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Yichen Liu Email & Phone Number

Software Engineer at Ridge Security Technology Inc.
Location: San Jose, California, United States 6 work roles 3 schools
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Current company
Ridge Security Technology Inc.
Role
Software Engineer
Location
San Jose, California, United States
Company size
49 employees

Who is Yichen Liu? Overview

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Yichen Liu is listed as Software Engineer at Ridge Security Technology Inc., a company with 49 employees, based in San Jose, California, United States. AeroLeads shows a matched LinkedIn profile for Yichen Liu.

Yichen Liu previously worked as Software Engineer Intern at Ridge Security Technology Inc. and Software Engineer Intern at Stellar Cyber. Yichen Liu holds Master Of Science - Ms, Computer Science - Machine Learning from Columbia University In The City Of New York.

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Ridge Security Technology Inc.

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Profile bio

About Yichen Liu

PROFESSIONAL Software Development Engineer and Machine Learning Specialist, bringing comprehensive portfolio of projects spanning cloud computing, big data, and computer vision, leveraging expertise in Python, Java, AWS, and advanced machine learning techniques. With experience at leading technology firms, delivering impactful contributions in software development, system enhancements and automation, this track record demonstrates consistently improved software and system flexibility, resource efficiency, and process automation. As a collaborative leader and mentor, excels in cross-functional communication, stakeholder management, and solving complex problems, driving continuous improvement across teams. Solid, well-rounded foundation in Computer Science, complemented by a results-driven approach.AREAS OF EXPERTISEProfessionalCollaborative | Consultative | Leader/Mentor | Concise Written, Verbal Communication | Stakeholder Management | Build Key Relationships | Continuous Improvement | Cross-Functional Communication | Manage Competing Priorities | Flexible | Critical Thinking/Problem-Solving | Meticulous Attention-to-DetailIndustry Knowledge and TechnologyPython | Pytorch | Java | Amazon Web Service (AWS), Rekognition | C++ | MATLAB | SQL | DynamoDB | Junit | Log4j2 | Mockito | Numpy | Pandas | Security | Lambda Windows | Linux | Docker | Ridgebot | SNS | IAM | API Gateway | CDK | Kalman Filtering | Tracking Algorithms | Neural Network, HMM, Decision Tree, Bagging/Boosting, Regression, Cluster, CNN/RNN/GAN | | YOLO V4 | OpenSearch | Natural Language Processing (NLP) | Supervised/Unsupervised/Reinforcement Learning | Agile | Proof of Concept | GIT Version ControlNOTABLE PROJECTS/ACCOMPLISHMENTSAdvanced Software Engineering | Online object trading service: Built SQL database in Java (e.g., items, users, transactions), allowing user search (e.g., name, ID, categories, post transactions, make negotiations) for efficient/seamless searching• Generated authorization tokens to fulfill client authorization/user login• Wrote unit tests/integration tests to run automatically during continuous integration Cloud computing and big data | Restaurant recommendation website: Supporting quick search of ~5000 restaurants, used Yelp API to acquire restaurant information, stored in DynamoDB, built OpenSearch• Built AWS Lex bot for NLP; extracted information from user input (e.g., time, cuisine, number of people, location, contact information)• Utilized lambda functions to recommend per input; sent recommendation through email/text to user via SES

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Yichen Liu's current company

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Ridge Security Technology Inc.
Ridge Security Technology Inc.
Software Engineer
San Jose, CA, US
Website
ridgesecurity.ai
Employees
49
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6 roles

Yichen Liu work experience

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Software Engineer Intern

Current
Ridge Security Technology Inc.

Milpitas, California, United States

  • Delivered plugins in Python for Ridge Bot; automatically scanned to exploit CVEs
  • Setup ~20 vulnerable targets in Windows, Linux Docker; delivered ~30 plugins for ~10 CVEs
  • Note: Researched NIST/other documents, published 3 POCs, wrote wiki page instructions
Jan 2024 - Present

Software Engineer Intern

Stellar Cyber

San Jose, California, United States

  • Delivered new connectors in dockers generating ~$500k revenue: performed on Connector Team; used Python under Linux in Agile model to modify existing hard-coded variables making system more flexible
  • Reduced 70% error reports in log for Office365 connectors: performed E2E tests, unit tests; checked logs in existing code base identifying bugs/merging fixes into main branch managing version control with Git
  • Allowed 5x more logs to be stored/improved system maintainability: Added codes to rotate/compress log files
  • Reduce memory usage of connectors by ~90% with generators enhancing resource usage efficiency
Apr 2023 - Jan 2024

Sde

Amazon Usa Alexa

Seattle, Washington, United States

  • Increased automation of Alexa video service: designed/delivered video content moderation system in Java
  • Used several Amazon Web Services (including Lambda functions, SNS, IAM, API Gateway, Rekognition, DynamoDB, and CDK)
  • Saved ~70% time: analyzed videos, stored unsafe content labels in database, returned labels on request
  • Maintained part of Alexa video service: monitored metrics ensuring system health
Jun 2022 - Aug 2022

Computer Vision Intern

Nanjing Institute Of City & Transport Planning Co., Ltd.

Nanjing, Jiangsu, China

  • Collaborated on team developing vehicle analyzing system with final product adoption by Nanjing traffic system; expected further utilization for entire Jiangsu Province
  • Applied YOLO V4 to recognize cars on roads by car plates providing real-time recognition (e.g., 20 pictures/second)
  • Implemented tracking algorithms with Kalman filter determining vehicle movement (e.g., 10 pictures/second)
  • Mentored new group members
Jul 2019 - Aug 2019

Data Collection And Process Intern

Itssky Co.Ltd

Nanjing, Jiangsu, China

  • Collaborated with a team on province highway map system. Read in roads data of thousands of miles.
  • Cooperated with monitors to get data about traffic volume and analyzed data to find patterns at different time.
  • Analyzed data to support a map system showing in time traffic volume on roads to help drivers reduce average travel time of vehicles on roads.
Jul 2018 - Aug 2018
Team & coworkers

Colleagues at Ridge Security Technology Inc.

Other employees you can reach at ridgesecurity.ai. View company contacts for 49 employees →

AG Alan Guo Alan Guo Colleague at Ridge Security Technology Inc. Palo Alto, California, United States, United States View → WN Waqas N. Waqas N. Colleague at Ridge Security Technology Inc. Dubai, United Arab Emirates, United Arab Emirates View → ZG Zinan Guo Zinan Guo Colleague at Ridge Security Technology Inc. Richardson, Texas, United States, United States View → AC Audrey Chen Audrey Chen Colleague at Ridge Security Technology Inc. San Jose, California, United States, United States View → KS Kevin Sisney Kevin Sisney Colleague at Ridge Security Technology Inc. Wichita, Kansas, United States, United States View → VL Victoria Luo Victoria Luo Colleague at Ridge Security Technology Inc. Pleasanton, California, United States, United States View → AD Agus Darojat Agus Darojat Colleague at Ridge Security Technology Inc. Jakarta, Jakarta, Indonesia, Indonesia View → LS Lylian S. Lylian S. Colleague at Ridge Security Technology Inc. México, Mexico, Mexico View → VD Victor Duarte Victor Duarte Colleague at Ridge Security Technology Inc. São Paulo, São Paulo, Brazil, Brazil View → AM Adriana Mora Adriana Mora Colleague at Ridge Security Technology Inc. Querétaro, Querétaro, Mexico, Mexico View →
3 education records

Yichen Liu education

Bachelor Of Science - Bs, Applied & Computational Mathematical Science - Discrete Math And Algorithms, 3.67/4

University Of Washington
FAQ

Frequently asked questions about Yichen Liu

Quick answers generated from the profile data available on this page.

What company does Yichen Liu work for?

Yichen Liu works for Ridge Security Technology Inc..

What is Yichen Liu's role at Ridge Security Technology Inc.?

Yichen Liu is listed as Software Engineer at Ridge Security Technology Inc..

Where is Yichen Liu based?

Yichen Liu is based in San Jose, California, United States while working with Ridge Security Technology Inc..

What companies has Yichen Liu worked for?

Yichen Liu has worked for Ridge Security Technology Inc., Stellar Cyber, Amazon Usa Alexa, Nanjing Institute Of City & Transport Planning Co., Ltd., and Itssky Co.Ltd.

Who are Yichen Liu's colleagues at Ridge Security Technology Inc.?

Yichen Liu's colleagues at Ridge Security Technology Inc. include Alan Guo, Waqas N., Zinan Guo, Audrey Chen, and Kevin Sisney.

How can I contact Yichen Liu?

You can use AeroLeads to view verified contact signals for Yichen Liu at Ridge Security Technology Inc., including work email, phone, and LinkedIn data when available.

What schools did Yichen Liu attend?

Yichen Liu holds Master Of Science - Ms, Computer Science - Machine Learning from Columbia University In The City Of New York.

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