Xiaomei Sofie Xie
Seattle
Summary
Full Stack .NET Developer with proven experience at Meta, Microsoft, and Amazon Fresh. Skilled in C#, .NET Core, ASP.NET, SQL Server, React, TypeScript, Azure, and CI/CD pipelines. Expertise in backend architecture, cloud-native applications, distributed data pipelines, ML workflows, and automated testing frameworks. Proven ability to optimize operations, improve customer satisfaction, and deliver measurable results.
Overview
9
9
years of professional experience
Work History
Substitute Professional
Mercer Island School District
01.2025 - Current
- - Assisted K–12 instruction and technology integration.
Retail Associate
Amazon Fresh
Bellevue, WA
07.2022 - 02.2026
- - Reduced customer issue resolution time by 40% and streamlined store operations.
Retail Consultant
FedEx Office
Issaquah, WA
09.2024 - 03.2025
- - Increased overall store sales by 38% and print service revenue by 25%.
- - Led customer experience initiatives, improving satisfaction by 22% and repeat business by 15%.
Software Engineer / Data Science (Contract)
Meta
Remote, WA
04.2022 - 07.2023
- - Developed end-to-end ML pipelines, reducing infrastructure costs by 30% and improving scalability and reliability.
- - Designed backend architecture and APIs with Redis caching, enhancing system responsiveness by 25%.
- - Built distributed SQL and big data pipelines (Presto, Spark, Scuba), scaling workloads 7x and providing actionable analytics.
- - Delivered data-driven visualizations supporting cross-functional teams and operational decision-making.
College-Level Tutor
Seattle Community College
Seattle, WA
02.2017 - 06.2023
- - Tutored 30+ students/week in Calculus, CS, Statistics, and Physics; improved grades by 20–30%.
E-Commerce Personal Shopper
Whole Foods Market
Bellevue, WA
07.2021 - 06.2022
- - Fulfilled orders with 99% accuracy, reducing errors/returns by 25%.
- - Optimized fulfillment workflow and increased repeat orders by 15–20%.
Software Engineer (Contract)
Microsoft
Redmond, WA
11.2020 - 08.2021
- - Developed automation testing frameworks for Microsoft Teams using C#, .NET, TDD, achieving 100% CI pipeline coverage and 20% faster releases.
- - Refactored 5,000+ lines of Python code into TypeScript/C#, improving maintainability and reducing errors by 30%.
- - Built automated UI tests with Selenium, Appium, and UiPath, ensuring consistent cross-platform performance.
- - Monitored pipeline performance with Power BI dashboards, streamlining deployment.
Xbox Gaming Tester
HCL
Redmond, WA
09.2019 - 02.2020
- - Tested Unity-based Xbox games and collaborated with developers to resolve bugs.
Full-Stack Software Developer (Intern)
Kenworth Truck Company
Seattle, WA
09.2018 - 06.2019
- - Developed full life-cycle web applications using C# .NET, RESTful APIs, MVC, SQL Server, and React.
- - Maintained and optimized applications with Angular, jQuery, JavaScript.
- - Followed Agile methodology and Git version control.
IT Help / Desktop Support Specialist
YWCA
Seattle, WA
09.2018 - 06.2019
- - Resolved 95% of tickets within SLA and improved staff technology adoption.
Education
Master of Science - Computer Science – Specialization: Data Science, Minor in Data Science
Seattle University
Seattle, WA, USA01.2022
Bachelor of Science - Computer Science
Seattle University
Seattle, WA, USA01.2019
Skills
- Languages & Frameworks: C#, NET Core, ASPNET, React, TypeScript, Python, C, PHP(HACK), Java
- ML & Data Science: PyTorch, Scikit-Learn, Pandas, Numpy, OpenCV, ML Pipelines, BERT, LSTM, YOLO
- Cloud & DevOps: Azure, AWS, Azure DevOps, GitHub Actions, CI/CD pipelines, Docker
- Databases & Data Tools: SQL Server, MySQL, Redis, Presto, Spark, CosmosDB, Kusto
- Testing & Automation: xUnit, NUnit, Selenium, Appium, UiPath, TDD
- Full Stack Developer
- Data Analysis / Digital Marketing
- Problem-solving / Communication
Languages
English
Full Professional
Chinese (Mandarin)
Native or Bilingual
Timeline
Substitute Professional
Mercer Island School District
01.2025 - Current
Retail Consultant
FedEx Office
09.2024 - 03.2025
Retail Associate
Amazon Fresh
07.2022 - 02.2026
Software Engineer / Data Science (Contract)
Meta
04.2022 - 07.2023
E-Commerce Personal Shopper
Whole Foods Market
07.2021 - 06.2022
Software Engineer (Contract)
Microsoft
11.2020 - 08.2021
Xbox Gaming Tester
HCL
09.2019 - 02.2020
Full-Stack Software Developer (Intern)
Kenworth Truck Company
09.2018 - 06.2019
IT Help / Desktop Support Specialist
YWCA
09.2018 - 06.2019
College-Level Tutor
Seattle Community College
02.2017 - 06.2023
Bachelor of Science - Computer Science
Seattle University
Master of Science - Computer Science – Specialization: Data Science, Minor in Data Science
Seattle University