Xinyu Zhang

Phone: 585-***-**** Email: adutjx@r.postjobfree.com

LinkedIn: www.linkedin.com/in/xz1753

SUMMARY

Experienced backend engineer with extensive exposure in AWS environment. Highly skilled in optimizing scalable and critical business-impacting models with Xpress and Java. Proficient in using modern frameworks and libraries to deliver top-quality products. SKILLS

PROGRAMMING LANGUAGES: Java, Python, TypeScript, PHP, React.js, SQL DATABASE TECHNOLOGIES: MySQL, PostgreSQL, MongoDB, Apache Spark TOOLS: XPress, DynamoDB, S3, CloudWatch, Sprint Boot, Dagger, Junit, Git, Flask EXPERIENCE

Amazon Seattle, WA

Software Development Engineer AFT Pick Prioritization Team 02/2022-Present

● Designed and implemented critical optimization algorithm by utilizing Java and Xpress to deal with Linear Programming of the key service model. Rolled out the feature to fulfillment centers in multiple regions and increased sub-model accuracy by up to 80%.

● Reconstructed and migrated team services to AWS with EC2. Enhanced the scalability, stability and convince to monitor across multiple services, and reduced the task latency from 65% to 48% during the peak.

● Developed new crucial business metrics by utilizing Lambda and published objects to S3 bucket. Enabled feature flag in DynamoDB and fulfilled the monitor and investigate purposes for PMs, BIEs and downstream teams.

● Revamped and updated several infrastructure metrics of services in CloudFormation and implemented services alarm in CloudWatch by utilizing TypeScript. Automated monitor process and reduced team effort for exception deep-dive process.

● Documented several services wiki and sourced multiple business and infrastructure metrics. Bucketized common service tickets with operational instruction, increased efficiency of whole teams for root cause investigation.

● Trained and mentored new hires in programming methodologies, development circles and new hire best practices. Rochester Institute of Technology Rochester, NY

Graduate Research Assistant Project: Data Science Learning Platform 08/2021-12/2021

● Collaborated with group of four to build a Data Science Learning Platform for RIT faculties and students with both frontend and backend implementation by using Python, React.js, and MongoDB. Utilized by professors as learning purpose for various courses.

● Optimized the frontend architecture design, and increased the website loading speed by 50% with Git version control.

● Implemented data cleaning, feature engineering and visualization by utilizing Pandas, Scikit-learn and Pyplot libraries. Reference: http://vclient4.cs.rit.edu:8000/

EMR Technology Pty Limited Hong Kong, China

(Remote) Data Reporting Analyst Sales Department 11/2019-12/2021

● Responsible for the design databases scheme and completed daily ad hoc tasks with PostgreSQL. Designed and automated business operation metrics such as monthly product selling by utilizing Python with Pyplot and Seaborn libraries.

● Analyzed the industry Profit and Loss, conversion rate and built dashboards via PowerBI. Communicated with stakeholders and deep dived possible reasons for fluctuations and participated in the pre-launch stage of marketing analysis.

● Researched potential selling products and predicted marketing trends in multiple countries by exploring correlations of products. Stony Brook Education Services Stonybrook, NY

Full Stack Engineer Technical Support division 10/2017-06/2018

● Designed and implemented a user login verification module to prevent malicious registration attempts by JavaScript.

● Designed and developed an online service platform by PHP, JavaScript which increased customer retention by 80%.

● Maintained an educational planning and consulting website for customers to achieve related information by MySQL.

● Responsible for the design and production of marketing materials including landing pages, email letters and case presentations. Reference: https://www.stonybrookeducationservices.com/contact.php EDUCATION

ROCHESTER INSTITUTE OF TECHNOLOGY Rochester, NY

M.S. Computer Science (Concentration on machine learning and big data) 08/2019-12/2021 Big Data Analytics Advanced Certificate 2021 RIT Uber, Amazon, Microsoft, LinkedIn, Facebook, Google BEIHUA UNIVERSITY Jilin, China

B.E. Civil Engineering 09/2015-06/2019

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