# Xinran (Ryan) Wang

> Software Engineer at Lime

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/xinranryanwang

Software Engineer at Lime

## Work Experience
### Software Engineer @ Lime
Jan 2018 – Present | San Francisco Bay Area
Infrastructure and Platform

### System Engineer @ NewsOnChat Inc.
Jan 2017 – Jan 2018 | San Francisco Bay Area
- Developed the backend of team collaboration mobile app TopiChat for iOS and Android platforms
- Implemented features in Java (Spring Boot, REST API) and JavaScript (Node.js, Express, Socket.IO)
- Built infrastructure using Cassandra (with Lucene plugin), Redis, Docker, Consul, and NGINX
- Developed two-factor authentication (2FA) feature using SMS, Email, and Push Notification services
- Implemented multi-party real-time Video Chat feature using Twilio API, WebRTC, and JWT
- Built a Survey system that generates PDF reports with pie and bar charts using PDFBox and XChart
- Developed a Read Receipt system for channel messages and topic posts with optimized time/space usage
- Implemented a Payment system integrated with other features using TransNational Payments API

### Software Engineer Intern @ NewsOnChat Inc.
Jan 2017 – Jan 2017 | San Francisco Bay Area
See above

### Software Engineer Intern @ Computation Institute
Jan 2016 – Jan 2016 | Greater Chicago Area
- Built a network monitoring/alerting system for the Worldwide LHC Computing Grid (WLCG) of CERN
- Implemented it to monitor latency, packet loss, throughput and traceroute, and email alerts to users
- Processed 5 billion perfSONAR logs with Elasticsearch/Python for a global network of 170 data centers
- Developed a minimal UI for user registration and preference settings using Google Forms/Sheets API
- Experimented with different anomaly detection methods such as using scikit-learn's one-class SVM model
- Launched the system and invited to give a talk at North American Throughput Meeting hosted by CERN


## Education
### Master of Science - MS in Computer Science
University of Chicago

### Bachelor of Science - BS in Resources Science and Engineering
Beijing Normal University


## Contact & Social
- LinkedIn: https://linkedin.com/in/xrwang

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Source: https://flows.cv/xinranryanwang
JSON Resume: https://flows.cv/xinranryanwang/resume.json
Last updated: 2026-04-05