# JinYing(Fiona) Ren

> Full-Stack Software Engineer | Javascript | Node | Express | React | MongoDB

Location: San Francisco, California, United States
Profile: https://flows.cv/jinyingfiona

Hello! I am a full-stack software engineer with a passion for delivering high-quality solutions that meet and exceed customer expectations. I have successfully completed multiple projects using a wide range of technologies and frameworks. With a strong background in front-end and back-end development, I am skilled in JavaScript, TypeScript, React, Node.js, and other related technologies. I am a quick learner who is always eager to learn new things and stay up-to-date with the latest industry trends. My key strengths include troubleshooting and problem-solving and the ability to handle pressure and meet deadlines.

If you're looking for a highly motivated software engineer who can make an impact, please feel free to reach out to me on LinkedIn.

Technical Experience:                                                                                                                                
Front End: JavaScript (ES5 and ES6), TypeScript, React, HTML5, CSS3, Redux, Bootstrap, jQuery, Tailwind CSS
Back End: Node.js, Express, PostgreSQL, MongoDB, MySQL, RESTful API Development, NGINX
Testing/Deployment: Jest, Mocha, Chai, AWS: EC2 / RDS / S3, Loader.io, K6, New Relic, CICD
Developer Tools: Vim, Git, Npm, Webpack, Babel, Agile Methodology, Trello

## Work Experience
### Full Stack Software Engineer @ Personal Projects
Jan 2022 – Present
Babycoin: cryptocurrency trading simulator

•Collaborated with a team of eight to integrate various components into a cohesive and user-friendly site, utilizing modern Agile practices and Git workflows for efficient development
•Implemented a real-time ticker tape and graph feature, using React and Tailwind CSS to provide an intuitive and responsive interface for tracking coin movements and making informed trading decisions
•Retrieved data via RESTful API in real-time and stored it with PostgreSQL and Node.js for efficient data management and retrieval

### Backend Software Engineer @ Personal Projects
Jan 2022 – Jan 2022
System design of an e-commerce website

• Redesigned an outdated monolithic backend to a micro-service architecture for independent scaling
• Designed MongoDB schemas and optimized queries with aggregation pipeline. Performed ETL process to migrate over 20 million product records into database
• Identified system bottlenecks and performed stress-testing with loader.io, K6, and New Relic to assist with optimization decisions
• Decreased latency by 99% at 4000 RPS with <10ms response time and <0.1% error rate by horizontally scaling the microservice (three EC2 instances and NGINX load balancer) and NGINX caching

### Frontend Software Engineer @ Personal Projects
Jan 2022 – Jan 2022
Atelier: Redesign of the eCommerce website

• Created and designed the Question and Answer widget with React and CSS to modernize legacy website 
• Developed backend service with RESTful API and deployed on AWS EC2 
• Analyzed performance with Google Lighthouse and Google Page Speed. Improved performance and accessibility scores from 46 to 99 points
• Wrote tests with React Testing Library and measure code coverage with Jest to ensure components render correctly

### Bilingual Computer Trainer @ Community Living Campaign
Jan 2021 – Present | San Francisco, California, United States
• Provided basics of computer, mobile phone, and tablet tutoring to seniors in person and remotely
• Developed the training curriculum designed for use in classes
• Offered one-on-one help to solve their technology and media problem 
• Hosted and planned event celebrations with nearly 160 participants remotely

### Bilingual Computer Trainer @ Community Living Campaign
Jan 2019 – Jan 2021 | San Francisco, California, United States
• Provide computer training and tutoring basics to Cantonese, Mandarin, and English-speaking students in person and remotely.
• Develop computer instructional materials useful for students.
• Provide one-on-one help with using Cellphone, Tablets, and Computer
• Assist the director with planning events and project

### Intern @ Hackbright Academy
Jan 2018 – Jan 2018 | San Francisco, California, United States
- Verified, updated, and corrected document
- Researched and retrieved requested data
- Data entry in Salesforce
- Contract management
- Using Frodo to edit events


## Education
### Advanced Software Engineer Immersive
Hack Reactor
Jan 2022 – Jan 2023

### Bachelor of Science - BS in Computer Science
San Francisco State University
Jan 2016 – Jan 2020


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

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Source: https://flows.cv/jinyingfiona
JSON Resume: https://flows.cv/jinyingfiona/resume.json
Last updated: 2026-03-20