Leah Sapan, Developer in Scarborough, United States
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Leah Sapan

Verified Expert  in Engineering

Full-stack Developer

Location
Scarborough, United States
Toptal Member Since
August 31, 2015

Leah is a motivated, self-taught, 拥有超过13年专业软件开发经验的分析思考者. She has a proven history of architecting, developing, 部署全功能的web应用程序，专注于用户体验和高性能的后端设计. Leah can manage multiple projects through the software development lifecycle, thrives in challenging environments to meet stringent deadlines, and has a deep passion for mentoring and growing colleagues.

Back-end DevelopmentFull-stackBack-endSecurityMobile App DevelopmentCode ReviewData EncryptionWeb ScrapingWeb CrawlersWeb SecurityAmazon RDSAnalyticsSecurity Policies & ProceduresData EngineeringChrome ExtensionsDedicated Mobile AppWeb CrawlerAnsibleSecurity EngineeringBlockchainDocker ComposeAndroid SDKLinuxAWS CloudWatchD3.js

Portfolio

Doctor's Choice
Python, Django, Starlette, FastAPI, PostgreSQL, Kubernetes, Docker, Salesforce...
Negotio
Python, Django, Django REST Framework, Django Channels, Shopify, Shopify API...
Parity Healthcare Analytics
Python, Django, Django REST Framework, PostgreSQL, Vue, Chart.js, Redis...

Experience

Full-stack - 13 yearsSecurity - 10 yearsPython - 10 yearsDjango - 10 yearsWeb Scraping - 9 yearsAmazon Web Services (AWS) - 9 yearsDocker - 6 yearsVue - 4 years

Availability

Part-time

Preferred Environment

Xcode, Visual Studio Code (VS Code), Terminal, Linux, MacOS

The most amazing...

...我曾经创建过一个完整的员工管理套件，它允许企业将员工数据和日程安排带入云.

Work Experience

Chief Technology Officer

2019 - 2022
Doctor's Choice
  • Coordinated architecture, development, 以及一个符合HIPAA标准的平台的开发运营，以支持客户探索最佳医疗保险选择和登记.
  • 使用Starlette和FastAPI微服务从多个服务收集数据, improving the performance by 450%.
  • Produced an algorithm to sift through more than 10,000 plan options, 根据每个客户的具体情况和需求，帮助找到最佳方案.
  • 设计了一个灵活的数据架构，允许多个公共数据源在PostgreSQL中分层.
  • Ingested 500GB of public data using Python scripts, Puppeteer, and consumable datasets to build a taxonomy of providers, practices, and pharmacies.
  • Reduced time to update production data by 99%, saving over 12 hours on each run.
  • 通过动态和高效的双向同步将平台与Salesforce集成，并定制Salesforce实例，以显着提高团队的效率.
  • Built unique experiences tailored to internal agents and clients, allowing users to use the platform effectively and efficiently.
Technologies: Python, Django, Starlette, FastAPI, PostgreSQL, Kubernetes, Docker, Salesforce, Django REST Framework, Microservices, HIPAA Compliance, Vue, Node.js, Test-driven Development (TDD), Puppeteer, Amazon S3 (AWS S3), Amazon EKS, Amazon Route 53, Amazon EC2, VPN, Amazon Virtual Private Cloud (VPC), Web Security, Amazon CloudFront CDN, Ansible, Terraform, Back-end Development, Full-stack, Data Encryption, Web Scraping, Back-end Architecture, SQL, CSS, REST APIs, Security, Amazon Web Services (AWS), Linux, JavaScript, Redis, Vuex, Amazon CloudWatch, Authentication, Scalable Architecture, Scraping, HTML, IT Security, Docker Compose, Vue 2, Terminal, Visual Studio Code (VS Code), Python 3, Pug, Webpack, Amazon RDS, Celery, Functional Testing, Unit Testing, CI/CD Pipelines, Python Asyncio, Chart.js, DigitalOcean, Analytics, GitLab CI/CD, Slack API, Security Policies & Procedures, Amazon Simple Email Service (SES), Web Crawlers, APIs, Flask, REST, Google Cloud Platform (GCP), HTML5, Back-end, Algorithms, Containers, Data Engineering, AWS IAM, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis, Technical Hiring, Interviewing, Team Management

Chief Technology Officer

2019 - 2021
Negotio
  • Designed and implemented a Shopify app for Negotio, allowing customers to automatically negotiate lower prices, driving more sales and higher conversion rates.
  • 开发了一个动态的基于vue的插件，可以自动嵌入到商家的网站中，无需人工干预, regardless of theme or custom code.
  • Created a performant back end to manage target prices, handle negotiations, create discount codes, and more using Django and Django Channels.
  • 建立了一个市场的前端，以探索所有的产品在协商的庞大的数据库.
Technologies: Python, Django, Django REST Framework, Django Channels, Shopify, Shopify API, Vue, DigitalOcean, Kubernetes, Docker, GitLab CI/CD, Puppeteer, Slack API, Python 3, Back-end Development, Full-stack, Data Encryption, Web Scraping, Back-end Architecture, SQL, CSS, jQuery, REST APIs, Security, Linux, JavaScript, Amazon S3 (AWS S3), PostgreSQL, Redis, Vuex, Ansible, Amazon CloudWatch, Authentication, Scalable Architecture, Scraping, HTML, IT Security, Docker Compose, Vue 2, Terraform, Docker Swarm, Mezzanine, Terminal, Visual Studio Code (VS Code), VPN, Web Security, Amazon CloudFront CDN, Pug, Webpack, Celery, CI/CD Pipelines, Python Asyncio, Chart.js, Analytics, Security Policies & Procedures, Amazon Simple Email Service (SES), Web Crawlers, APIs, REST, HTML5, Back-end, Algorithms, Containers, Data Engineering, AWS IAM, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis, Technical Hiring, Interviewing, Team Management, Chrome Extensions

Senior Full-stack Software Engineer

2020 - 2020
Parity Healthcare Analytics
  • 开发了一种基于患者急性程度的基准工具，以计算护士人员配备需求并跟踪特定的生产力指标.
  • 构建了模块化设计，以促进大量的核心功能，同时允许轻松添加其他模块.
  • 在采用Python的DRY原则和OO模式的同时，减少了80%来自其他顾问原型的重复代码.
  • 构建一个灵活的报告框架来分析来自任何模块的数据，而不需要特定于模块的代码.
Technologies: Python, Django, Django REST Framework, PostgreSQL, Vue, Chart.js, Redis, DigitalOcean, Kubernetes, Docker, Test-driven Development (TDD), Unit Testing, Functional Testing, Analytics, Back-end Development, Full-stack, Data Encryption, Back-end Architecture, SQL, CSS, REST APIs, Security, Linux, JavaScript, Vuex, Authentication, Scalable Architecture, HTML, IT Security, Docker Compose, Vue 2, Terraform, Terminal, Visual Studio Code (VS Code), Web Security, Python 3, Pug, Webpack, CI/CD Pipelines, Security Policies & Procedures, APIs, REST, HTML5, Back-end, Algorithms, Containers, Data Engineering, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis

Container Solution Architect

2019 - 2020
Caterpillar
  • Led the effort to promote the use of Docker containers within CAT.
  • Established best practices for image creation and management.
  • Authored a guide for working with Docker on CAT machines, 包括与公司安全策略相关的常见问题的故障排除步骤.
Technologies: Docker, Python, Security Policies & Procedures, Data Encryption, Linux, Docker Compose, Terminal, Visual Studio Code (VS Code), Containers, System Architecture, Task Analysis

Senior Full-stack Software Engineer

2019 - 2020
Minervini Private Access
  • 为MPA设计了一个创新的平台，向金融客户实时广播非常有时效性的警报.
  • 重新构建应用程序，以比上一代平台快300倍的速度发送警报.
  • 自动化客户管理和计费流程，每月节省超过120小时.
  • Improved editor preparation to be 1,000 times faster than before.
  • Developed automatic detection of clients breaching the T&C by using automated scripts or bots to ingest alerts from the site.
  • 使用Kubernetes将服务安全地部署到AWS，同时支持自动构建, tests, and deployments using GitHub Actions.
  • Created native apps for iOS and Android with NativeScript and Vue.
  • Achieved 100% test coverage with both unit tests and functional tests.
Technologies: Python, Vue, Socket.IO, Amazon EKS, Amazon CloudFront CDN, Amazon S3 (AWS S3), PostgreSQL, Django, Django REST Framework, Webpack, Test-driven Development (TDD), Functional Testing, Unit Testing, Card Payments, Billing Systems, Kubernetes, Docker, CI/CD Pipelines, iOS, Android, NativeScript, NativeScript-Vue, Python Asyncio, Redis, Celery, Fraud Prevention, Back-end Development, Mobile App Development, Full-stack, Data Encryption, Back-end Architecture, SQL, CSS, Mobile Development, REST APIs, Security, Amazon Web Services (AWS), Linux, JavaScript, iOS SDK, Amazon EC2, Android SDK, Swift, Vuex, Ansible, Java, Amazon CloudWatch, Xcode, Authentication, Scalable Architecture, HTML, IT Security, Docker Compose, Vue 2, Terraform, Docker Swarm, Terminal, Visual Studio Code (VS Code), Amazon Virtual Private Cloud (VPC), Amazon Route 53, VPN, Web Security, Python 3, Pug, Amazon RDS, GitLab CI/CD, Security Policies & Procedures, Amazon Simple Email Service (SES), APIs, REST, HTML5, Algorithmic Trading, Trading, Back-end, Fintech, Containers, AWS IAM, Architecture, Data, Code Review, Source Code Review, Task Analysis

Senior Full-stack Software Engineer

2018 - 2018
Cobalt Archive
  • 使用Django和Vue构建了一个用于存档web、电子邮件和社交媒体内容的平台.
  • 实现了免触摸登录流程，引导用户通过独立配置和直接支付在网站上激活个人账户.
  • 创建一个存在证明页面，利用存储在区块链上的哈希值来证明文件在特定时间以特定状态存在.
  • Developed an efficient, cross-medium search functionality using Elasticsearch.
Technologies: Python, Django, Django REST Framework, Celery, Redis, Elasticsearch, PostgreSQL, Vue, Amazon Simple Email Service (SES), Docker, Docker Swarm, Web Scraping, Web Crawlers, Facebook API, Twitter API, LinkedIn API, Back-end Development, Full-stack, Data Encryption, Back-end Architecture, SQL, CSS, REST APIs, Security, Amazon Web Services (AWS), Linux, JavaScript, Amazon EC2, Amazon S3 (AWS S3), Jenkins, Vuex, Ansible, Amazon CloudWatch, Authentication, Scalable Architecture, Scraping, HTML, IT Security, Docker Compose, Amazon Simple Queue Service (SQS), Vue 2, Mezzanine, Terminal, PyCharm, Amazon Virtual Private Cloud (VPC), Amazon Route 53, VPN, Web Security, Amazon CloudFront CDN, Python 3, Pug, Webpack, Amazon RDS, Card Payments, Billing Systems, CI/CD Pipelines, GitLab CI/CD, Slack API, Security Policies & Procedures, APIs, REST, HTML5, D3.js, Back-end, Fintech, Containers, Data Engineering, AWS IAM, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis, Chrome Extensions

Director of Software Development

2013 - 2017
RowdMap
  • Led an international, remote team of 15 developers, software engineers, data engineers, 以及各种技术人员来创建和完善医疗保健分析平台.
  • 使用D3构建自定义分析视觉效果，以及用户友好的查询构建器.
  • Transformed 5TB of healthcare data into a highly-optimized PostgreSQL database.
  • 开发了一个内部平台来自动化和管理数据加载和转换.
  • 根据源数据设计优化的表，使平台能够高效查询.
  • Managed all AWS infrastructure and controls, including container servers, databases, network security, high availability, CI/CD flows, and ensured secure employee device provisioning with encryption and VPNs.
  • Led and passed a NIST 800-53 security and privacy control audit.
  • 通过Docker Swarm部署高可用性，实现服务水平协议(sla).
Technologies: Python, Amazon Virtual Private Cloud (VPC), Amazon Web Services (AWS), Django, Django REST Framework, MongoDB, PostgreSQL, MySQL, Python 2, Python 3, Backbone.js, Angular, Pug, Puppeteer, Selenium, Webpack, Amazon EC2, Docker Swarm, Docker, Jenkins, VPN, Amazon RDS, Celery, Redis, Back-end Development, Full-stack, Data Encryption, Web Scraping, Back-end Architecture, SQL, CSS, jQuery, REST APIs, Security, Linux, JavaScript, Amazon S3 (AWS S3), Ansible, Java, Neo4j, Amazon CloudWatch, Authentication, Scalable Architecture, Scraping, HTML, MacOS, IT Security, Docker Compose, Mezzanine, HIPAA Compliance, Terminal, PyCharm, Salesforce, Node.js, Amazon Route 53, Web Security, Amazon CloudFront CDN, CI/CD Pipelines, Analytics, Slack API, Security Policies & Procedures, Web Crawlers, APIs, Flask, REST, HTML5, D3.js, Back-end, Algorithms, Containers, Data Engineering, AWS IAM, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis, Technical Hiring, Interviewing, Team Management, Chrome Extensions

Senior Full-stack Software Engineer

2009 - 2013
Funtown Splashtown USA
  • 为游乐园行业设计并实施了一个具有鲜明特色的完整员工管理套件.
  • 利用Ford-Fulkerson方法，根据数据库中存储的训练知识和以前的分配，生成每日骑行操作员分配.
  • 实现了一个完整的调度系统，员工可以在线访问调度, receive shift notifications, and propose shift swaps.
  • 通过一个配套的应用程序改善了客人的体验，帮助客人更好地导航公园.
Technologies: PHP, CakePHP, iOS, Android, jQuery, JavaScript, Excel VBA, Algorithms, Back-end Development, Mobile App Development, Full-stack, Back-end Architecture, MySQL, SQL, CSS, Mobile Development, Objective-C, REST APIs, Python, Security, Linux, Django, iOS SDK, Android SDK, Docker, Swift, Java, Xcode, Authentication, HTML, IT Security, Terminal, Python 2, APIs, REST, HTML5, Back-end, Containers, Task Analysis

ToonHQ

http://toonhq.org
我为《欧博体育app下载》和《欧博体育app下载》的玩家创造了一个动态游戏助手，其中包含一个互动系统，可以帮助玩家在游戏中找到其他人. Optimized the site to keep up with over 100,000,000 requests and over 1TB of data per month on a DigitalOcean deployment budget. Implemented real-time data streams to improve user experience and performance.

Stalks.io

http://stalks.io
I created a Stalk Market guide for Animal Crossing: New Horizons with over 1,000,000 page views per month. 实现了一个算法，以准确地预测价格的基础上，球员之前的价格信息. 设计了一个友好的用户界面，以有趣和易于理解的方式呈现销售建议. 增加了社交协作功能，朋友之间可以查看彼此的价格和预测, enabling them to decide if they should sell at their island.

Starblock Valley

http://starblockvalley.lukesapan.com
Starblock Valley是一个小型dApp，可以让你管理以太坊区块链上的分散农场. I built it in a few hours to explore web3 concepts. 农场上的每一个动作都被发送到Ropsten测试网，并在Ropsten Etherscan上可见.
Image of Ramping up Software Deployment - A Docker Swarm Tutorial publication
Publication

Ramping up Software Deployment - A Docker Swarm Tutorial

http://p07sq.cuentascorrientes.net/devops/software-deployment-docker-swarm-tutorial
2012 - 2013

电子工程与计算机科学学士学位课程，主修计算机工程

University of Southern Maine - Portland, ME, USA

2010 - 2012

计算机工程方向的计算机工程学士学位课程

University of Maine - Orono, ME, USA

APRIL 2018 - PRESENT

Blockchain Specialization

Toptal

Languages

Swift, HTML, CSS, JavaScript, Objective-C, SQL, Python, Python 2, Python 3, Pug, HTML5, Java, Excel VBA, Solidity, PHP, C++, C, C#

Frameworks

Android SDK, Django, Django REST Framework, Selenium, iOS SDK, NativeScript, Django Channels, CakePHP, Mezzanine, Truffle, Flask, React Native, Angular, Electron

Libraries/APIs

REST APIs, Backbone.js, jQuery, Vuex, Vue 2, Vue, Node.js, Puppeteer, Socket.IO, Python Asyncio, Chart.js, Shopify API, D3.js, Slack API, React, Facebook API, Twitter API, LinkedIn API

Tools

Terminal, PyCharm, Xcode, Amazon Virtual Private Cloud (VPC), Ansible, Docker Swarm, Docker Compose, Terraform, Jenkins, Amazon Simple Queue Service (SQS), VPN, Amazon CloudFront CDN, Webpack, Celery, NativeScript-Vue, GitLab CI/CD, Amazon Simple Email Service (SES), Amazon CloudWatch, Amazon EKS, AWS IAM

Paradigms

Back-end Architecture, Mobile Development, Microservices, Test-driven Development (TDD), Functional Testing, Unit Testing, REST, HIPAA Compliance

Platforms

Amazon Web Services (AWS), Linux, Docker, Android, MacOS, iOS, Amazon EC2, Salesforce, DigitalOcean, Shopify, Netlify, Visual Studio Code (VS Code), Blockchain, Kubernetes, Ethereum, Google Cloud Platform (GCP)

Storage

PostgreSQL, MySQL, Redis, Amazon S3 (AWS S3), Elasticsearch, Neo4j, MongoDB

Other

Data Encryption, Scalable Architecture, Authentication, Back-end Development, IT Security, Security, Scraping, Web Scraping, Full-stack, Mobile App Development, Starlette, FastAPI, Amazon Route 53, Web Security, Amazon RDS, Card Payments, Billing Systems, CI/CD Pipelines, Analytics, Security Policies & Procedures, Web Crawlers, APIs, Back-end, Fintech, Containers, Data Engineering, Architecture, System Architecture, Data, Code Review, Source Code Review, Task Analysis, Technical Hiring, Interviewing, Team Management, Chrome Extensions, Fraud Prevention, Algorithmic Trading, Trading, Algorithms, DApps

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