Roxana Chiorean, Developer in Truckee, CA, United States
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Roxana Chiorean

Verified Expert  in Engineering

Software Developer

Location
Truckee, CA, United States
Toptal Member Since
June 6, 2019

Roxana是一名高级后端工程师,在大公司和初创公司都有近十年的专业经验. 在Hewlett Packard Enterprise工作期间,他是OpenStack云框架的开源贡献者, 她加入了一家医疗保健初创公司,专门从事大数据处理技术. Roxana是一个友好的人,对建立伟大的多元文化团队充满热情.

Availability

Part-time

Preferred Environment

MacOS, Ubuntu, Vim Text Editor, PyCharm, Git

The most amazing...

...我参与的项目是一个数据质量可视化仪表板,它可以帮助用户更好地理解和监控数据质量.

Work Experience

Senior Software Engineer

2016 - 2019
Nuna Health
  • 负责ETL数据处理管道的不同组件和Spark集群配置.
  • 帮助构建数据质量工具来分析处理数据的质量.
  • Designed and built a data quality visualization dashboard.
  • 扩展数据平台,使其能够处理数百tb的数据.
  • 帮助构建一个API,使用Python和Django将患者与初级保健提供者匹配起来.
  • 围绕客户数据的sla设计并构建了一个网页和通知系统.
  • 与数据科学家合作扩展数据建模算法.
技术:亚马逊网络服务(AWS), Apache气流,Looker, Spark, Scala, Java, Django, Python

Software Developer

2015 - 2016
Hewlett-Packard Enterprise (HPE Helion Cloud)
  • 参与开源云框架项目OpenStack, specifically to the authentication and authorization service.
  • 通过为社区中的其他成员做代码审查和参加计划会议,参与到开源社区中.
  • 实现了HPE Helion Cloud的web单点登录认证.
  • Improved the OpenStack client command line interface (CLI).
  • 使用LDAP驱动程序集成改进了身份验证机制.
  • Contributed to the open source Python library, ldap3, with code that enabled unit test mocking capability.
Technologies: Ansible, OpenStack, Python

Software Developer | Team Lead

2011 - 2015
惠普企业(HP数据库和中间件自动化)
  • 建立了自动化数据库和中间件管理任务的工作流.
  • Implemented internationalization and localization of the code.
  • 担任系统架构师和团队领导,指导实习生和更多初级工程师.
  • Improved code quality by standardizing the code review process.
  • 领导与其他惠普软件产品集成的项目.
Technologies: Java, Python

Malware Researcher

2010 - 2011
Bitdefender
  • Analyzed the behavior of new malware through reverse engineering.
  • Added detection for the new viruses into the antivirus product.
  • Developed anti-malware heuristic techniques.
  • 创建了一种算法,通过动态行为分析和图像处理来检测非法密钥生成器.
  • Developed an algorithm to avoid false positive alerts.
Technologies: Reverse Engineering, Assembly, Python, C

Data Quality Visualization Dashboard

At Nuna Health, as part of the data processing pipeline, we generated a lot of data quality metrics and validations. 问题是,有太多的参数和验证,人类无法理解所有这些生成的数字, so this situation created a lot of manual work.

我开始设计一个数据质量可视化仪表板,以便用户更好地理解和监控数据质量.

设计过程包括用户访谈,以更好地了解项目需求, a couple of brainstorming sessions and multiple prototypes.

I chose to implement the dashboard using Looker, 一个商业智能工具,具有很好的可视化功能,用于大数据分析. 使用Looker自己的数据建模语言(LookML),我围绕客户机运行的数据的总体质量实现了一组仪表板, 多个数据处理运行和图表之间的比较,突出显示数据质量随时间变化的峰值.

该工具由数据操作员用户使用,每个月减少了数十小时的手工工作.

Primary Care Provider Matching API

When I worked at a healthcare startup, 我帮助设计和开发了一个RESTful API,用于在给定一组约束条件(如健康状况)的情况下,将患者与最佳可用医生进行匹配, physical location, age, and more.

It was a very impactful project, 运送到健康保险提供商,以改善患者的医疗保健结果.

Technologies: Python, Django

Data Calendar Web Page and Notification System

During my time at Nuna Health, 我设计并实现了一个客户数据日程管理和重要数据事件通知系统.

该系统跟踪接收客户端数据的预期时间表, late data updates, expected SLA deliverable dates. 我建立了一个网页,以一种友好的视觉方式显示所有这些信息,并建立了一个通知系统,通过电子邮件提醒用户重要事件,如延迟数据, 特定客户的所有月度数据到达的时刻, and so on.

这个项目是使用Python/Django和Angular开发的,它帮助减少了数据操作员用户在Excel电子表格中手动跟踪所有这些信息的大量手工工作. It also helped avoiding missing important deadlines.

Open Source Contributions for Openstack

For one and a half years, 我有幸成为惠普开源项目OpenStack的贡献者之一. I contributed to multiple parts of the OpenStack repository, 这让我有机会与其他公司的优秀开发人员互动,他们也在为OpenStack做出贡献, Red Hat, Rackspace, and more).
2010 - 2012

Master's Degree in Distributed Systems

Babeș-Bolyai University - Cluj-Napoca, Romania

2007 - 2010

Bachelor's Degree in Computer Science

Babeș-Bolyai University - Cluj-Napoca, Romania

FEBRUARY 2014 - PRESENT

Scrum Master

Agile Development School

Libraries/APIs

REST APIs

Tools

Git, Spark SQL, AWS CloudFormation, Jenkins, Amazon Elastic MapReduce (EMR), PyCharm, Vim Text Editor, Apache Airflow, Looker, Ansible

Frameworks

Django, Spark

Paradigms

敏捷软件开发,RESTful开发,函数式编程

Languages

Python, SQL, Java, C, Assembly, Scala

Platforms

Amazon EC2, Linux, Databricks, OpenStack, Ubuntu, MacOS, Amazon Web Services (AWS)

Storage

Amazon S3 (AWS S3), MySQL, MongoDB

Other

Data Engineering, Reverse Engineering

Collaboration That Works

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