Ying D. Email & Phone Number

𝐆𝐫𝐞𝐞𝐧𝐞𝐎𝐜𝐞𝐚𝐧- 𝐓𝐞𝐱𝐭 𝐚𝐧𝐝 𝐕𝐢𝐝𝐞𝐨 𝐜𝐡𝐚𝐭 𝐰𝐢𝐝𝐠𝐞𝐭 𝐟𝐨𝐫 𝐚 𝐧𝐨𝐧-𝐩𝐫𝐨𝐟𝐢𝐭 𝐞-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐰𝐞𝐛𝐬𝐢𝐭𝐞Tech Stack: React | Node.js | Express | Socket.io | WebRTC | Heroku | Styled-Components• Developed a full mesh network topology with WebRTC to stream live webcam data to selected users• Created a live text message widget with Socket.io to handle bi-directional communication• Collaborated with 7 engineers to decide DBMS, schema design, project architecture, Git workflow, and division of labor using AGILE methodology

𝐂𝐚𝐧𝐲𝐞𝐧𝐧𝐞𝐀𝐏𝐈 - 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦 𝐰𝐚𝐬 𝐝𝐞𝐬𝐢𝐠𝐧𝐞𝐝 𝐚𝐧𝐝 𝐬𝐜𝐚𝐥𝐞𝐝 𝐭𝐨 𝐡𝐚𝐧𝐝𝐥𝐞 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐥𝐞𝐯𝐞𝐥 𝐭𝐫𝐚𝐟𝐟𝐢𝐜 𝐟𝐨𝐫 𝐨𝐯𝐞𝐫 10 𝐦𝐢𝐥𝐥𝐢𝐨𝐧 𝐝𝐚𝐭𝐚 𝐞𝐧𝐭𝐫𝐢𝐞𝐬Tech Stack: Node.js | Express | PostgreSQL | AWS EC2 | K6 | Loader.io | NGINX | Git • Built a microservice-based backend system with an initial capacity of 100 requests per second (RPS), optimized to 2500 RPS, a 250% throughput increase• Increased system capability using horizontal scaling and load balancing with NGINX• Identified and resolved performance bottlenecks with Loader.io and K6• Reduced reading and writing time in PostgreSQL database of over 10 million records from 2s to less than 10ms with query planner and query optimization

𝐍𝐨𝐭𝐒𝐭𝐫𝐨𝐦 - 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 𝐰𝐢𝐝𝐠𝐞𝐭 𝐟𝐨𝐫 𝐚 𝐝𝐞𝐩𝐚𝐫𝐭𝐦𝐞𝐧𝐭 𝐬𝐭𝐨𝐫𝐞 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧Tech Stack: React | Node.js | Express | Webpack | SASS | Jest | Git • Revitalized outdated legacy web app, with a focus on the reviews component using React with RESTful API• Improved navigation by implementing filtering and weighted sorting algorithm on hundreds of reviews• Decreased page load time by 80% using compression configurations and reduced bundle size

Seagoville, Tx

• Managed the Medical Protection System consisting of over 300 personnel resulting in a 10% increase in the unit's medical readiness compliance• Served as the Medical Readiness Administrator responsible for coordinating all Medical Soldier Readiness Processing for over 100 Soldiers in support of the UAMTF 2020 COVID response• Monitored and utilized numerous medical systems and software eg. AHLTA, CHCS, PBUSE, and TRAC2ES to provide routine reports to the Command Surgeon with critical analysis of deficiencies and trends affecting the overall unit medical readiness

Springfield, Missouri Area

• Designed and developed electric motors used in residential and light commercial ventilation and central vacuum products with cost-effective solutions and meet client expectations, worked both alone and in a team environment• Researched and recommend new electric motor technologies and associated suppliers that increased certain motor efficiency by 5 percent

Springfield, Missouri Area

Teaching undergraduate level physics

Springfield, Missouri Area

Utilizing Femtosecond and Nanosecond Pulsed Laser Deposition to grow thin films (CZTS, V2O5) on different substrates (glass, Si wafer, sapphire). Compare the difference between the films which deposited by Pulsed Laser Deposition and Femtosecond Pulsed Laser Deposition by using X-rayDiffraction, Scanning Electron Microscope, Raman Spectroscopy, XPS.

Education record

12-week software engineering immersive program with over 1000+ hours of coding. Full-Stack development with JavaScript, React, Express.

U.S. Army 68G Patient Administration Specialist, 97

U.S. Army 68G Patient Administration Specialist

Master Of Science (M.S.), Materials Science

Activities and Societies: Courses: Structure of Solids, Vapor Synthesis of Materials, Thermodynamics of Materials, Introduction.