# Ya Liu

> Software Engineer at Coinbase

Location: United States, United States
Profile: https://flows.cv/yaliu

I glue APIs together, among other things

## Work Experience
### Software Engineer @ Coinbase
Jan 2022 – Present

### Software Engineer @ Coinbase
Jan 2022 – Jan 2022

### Full Stack Engineer @ Personal Projects
Jan 2021 – Jan 2021
𝐒𝐡𝐨𝐩 𝐅𝐫𝐨𝐧𝐭 - 𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐭𝐨 𝐩𝐮𝐫𝐜𝐡𝐚𝐬𝐞 𝐢𝐭𝐞𝐦𝐬, 𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐛𝐲 𝐒𝐡𝐨𝐩𝐢𝐟𝐲
Tech Stack: TypeScript | React | Shopify Admin API | Node.js | Express | MongoDB | MUI
• Built a Shopify development store to integrate with private apps, in order to provide a list of products for purchase
• Implemented a shopping cart for users to add items, update, and check out with items in the cart
• Styled all React components with MUI (formerly Material-UI) resulting in a coherent design and user workflow, used a 3-step process for a streamlined checkout experience
• Saved order information (shipping information and cart content) to MongoDB for users to update and delete orders based on the email used at checkout

### Full Stack Engineer @ Personal Projects
Jan 2021 – Jan 2021
𝐁𝐞𝐭𝐭𝐞𝐫 𝐁𝐞𝐚𝐧𝐬 - 𝐌𝐨𝐛𝐢𝐥𝐞-𝐟𝐢𝐫𝐬𝐭 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐭𝐨 𝐦𝐚𝐫𝐤𝐞𝐭 𝐥𝐨𝐜𝐚𝐥 𝐜𝐨𝐟𝐟𝐞𝐞 𝐬𝐡𝐨𝐩𝐬
Tech Stack: Next.js | Google Places API | GraphQL | Prisma | PostgreSQL | Firebase
• Engineered comprehensive search functionality backed by Google Places API and Geolocation API with filtering and distance-based sorting
• Managed data returned by the API using React Context, resulting in minimal data requests
• Researched production frameworks and pitched Next.js to the team, resulting in a lightning-fast production build with an average first contentful paint of 0.7s
• Completed user-story responsibilities early and assisted teammates in trouble-shooting and feature implementation

### Back End Software Engineer @ Personal Projects
Jan 2021 – Jan 2021
𝐀𝐭𝐞𝐥𝐢𝐞𝐫 𝐀𝐏𝐈 - 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐨𝐯𝐞𝐫𝐡𝐚𝐮𝐥 𝐝𝐞𝐬𝐢𝐠𝐧𝐞𝐝 𝐟𝐨𝐫 𝐬𝐜𝐚𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐚𝐧𝐝 𝐟𝐚𝐮𝐥𝐭 𝐭𝐨𝐥𝐞𝐫𝐚𝐧𝐜𝐞
Tech stack: Node.js | Express | PostgreSQL | AWS EC2 | K6 | Loader.io | NGINX
• Built a microservice-based backend system with an initial capacity of 100 requests per second, optimized to 8000 RPS, a 790% throughput increase
• Increased system capability using horizontal scaling and load balancing with NGINX
• Identified and resolved performance bottlenecks with Loader.io and K6
• Reduced lookup time in a read-heavy PostgreSQL database of over 10 million records from 3s to <10ms with query planner and query optimization

### Front End Software Engineer @ Personal Projects
Jan 2021 – Jan 2021
𝐓𝐨𝐩𝐡 𝐂𝐥𝐨𝐭𝐡𝐢𝐧𝐠 𝐂𝐨 - 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 𝐰𝐢𝐝𝐠𝐞𝐭 𝐟𝐨𝐫 𝐚𝐧 𝐞-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧
Tech stack: React | Node.js | Express | Webpack | CSS | Jest
• Revitalized outdated legacy web app, specifically the reviews component using React backed with RESTful API
• Improved navigation by implementing a filtering and weighted sorting algorithm on hundreds of reviews
• Implemented responsive CSS design that optimized user experience across desktop, tablet, and mobile devices
• Decreased page load time by 75% using compression configurations and reduced bundle size

### Senior Instructor @ Sanli International Education Group | 三立国际教育集团
Jan 2018 – Jan 2019 | Nanjing, China

### Research Coordinator @ New York State Psychiatric Institute
Jan 2015 – Jan 2017 | New York, New York, United States

### Mental Health Counselor @ Chinese People's Public Security University
Jan 2014 – Jan 2015 | Beijing, China

### Coordinator of Faculty Recruitment @ Sinoway International Education
Jan 2012 – Jan 2014 | Beijing, China


## Education
### Master of Arts - MA in Clinical, Counseling and Applied Psychology
Teachers College, Columbia University
Jan 2015 – Jan 2017

### Bachelor of Arts - BA in Psychology, (minor in) Environmental Studies
Lawrence University
Jan 2008 – Jan 2012

### High School Diploma
Nanjing Foreign Language School


## Contact & Social
- LinkedIn: https://linkedin.com/in/ya-liu1

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Source: https://flows.cv/yaliu
JSON Resume: https://flows.cv/yaliu/resume.json
Last updated: 2026-03-29