# Zhengnan X.

> A software engineer who loves working on data science as well

Location: Tempe, Arizona, United States
Profile: https://flows.cv/zhengnanx

Stay hungry, stay foolish.

## Work Experience
### Sr Software System Engineer @ Langan Engineering & Environmental Services
Jan 2022 – Jan 2025 | Phoenix, Arizona, United States

### Software Engineer @ Kforce Inc
Jan 2021 – Jan 2022

### Frontend Developer @ Zira
Jan 2021 – Jan 2021
-Developed the mobile app site for Zira on IOS and Android platform using Flutter/Dart
-Implemented functionalities of the mobile app and landing screens from concept through deployment.
-Used Postman to test APIs and PostgresSQL to store the data.
-Used openapi to generate client side API from Kotlin backend and integrating backend with frontend UI
-Worked in an agile team software development environment to continuously improve the functionality

### Research Assistant @ University of Arizona
Jan 2018 – Jan 2021 | United States
WorldTree Project:
• Annotated a corpus of science exam questions of 7787 questions for fine-grained multi-class classification tasks
• Generated data entries (10,000 entries in total) for a semi-automatic science knowledge base corpus
• Generated structured explanations for around 2000 questions
Explanation Regeneration task:
• Analyzing the correlation of two data sets using pandas
• Exploring multi-task-learning to train supervised machine learning models to do question answering
• Adapting LambdaRank to rank the explanations for a given question

### Software Development Intern @ Coeur d’Alene Online Language Resource Center
Jan 2019 – Jan 2019 | United States
• Redevelop a full-stack web applications for native language learner to search language resource
• Using React to build components on the front-end, allowing user to search/filter/edit/add language entries
• Using Sequalize and GraphQL to build/query/connect the database and Docker for deployment
• Collaborating with the team in pair programming to ensure the quality of the code

### Program Coordinator @ The Asia Institute
Jan 2018 – Jan 2018 | Shanghai City, China


## Education
### Master's degree in Information Science/Studies
University of Arizona
Jan 2018 – Jan 2021

### Bachelor's degree in Linguistics
Shanghai International Studies University
Jan 2014 – Jan 2018

### Exchange non-degree seeking in English Language and Literature, General
Slippery Rock University
Jan 2017 – Jan 2017


## Contact & Social
- LinkedIn: https://linkedin.com/in/zhengnan-xie
- GitHub: https://github.com/zhengnanx

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Source: https://flows.cv/zhengnanx
JSON Resume: https://flows.cv/zhengnanx/resume.json
Last updated: 2026-03-23