Paul is available for hire
Hire PaulPaul Barriere
Verified Expert in Engineering
Full-stack Developer
Richardson, TX, United States
Toptal member since November 28, 2023
Bio
Paul is a full-stack developer with almost three decades of experience. His primary focus is .NET Core back-end processes. He has worked for many industries, including global investment banks, hedge funds, insurance companies, retail, and healthcare. Paul has worked with companies of all sizes, from startups to large Fortune 500 companies.
Portfolio
Independent Contractor
JavaScript, .NET, .NET Core, Cloud, Serverless, C#, Full-stack...
Maverick Capital
.NET, SQL, TFS, C#, Full-stack, Amazon Web Services (AWS), API Integration...
Systemates. Inc
Active Server Pages (ASP), .NET, SQL, C#, Full-stack, Architecture...
Experience
- C#.NET - 20 years
- SQL - 20 years
- Windows - 20 years
- Azure DevOps - 10 years
- Entity Framework - 10 years
- Docker - 7 years
- .NET Core - 5 years
- .NET 6 - 2 years
Availability
Part-time
Preferred Environment
Windows, C#.NET, Slack
The most amazing...
...thing I've done is use .NET 6 and AWS to create a scalable data warehouse to serve consumer, mobile, and admin interfaces with healthcare data.
Work Experience
Independent Contractor
2010 - PRESENT
Independent Contractor
- Utilized .NET 6, Azure DevOps, and AWS and created a scalable data warehouse to serve consumer, mobile, and admin interfaces with healthcare data.
- Pulled the Fast Healthcare Interoperability Resources (FHIR) and EDI X12 data from multiple insurance providers and stored them in DynamoDB using AWS Fargate/Amazon ECS.
- Used .NET 5 Core, Docker containers, Azure App Service, and Kubernetes to create a health service application API. Constructed the build and release pipelines using Azure DevOps to serve multi-environment deployments consistently and reliably.
- Built a credit monitoring API for B2B consumers to find out if a consumer's identity is for sale on the dark web using C#, a web API, AWS, Amazon MQ, Fargate Elastic Container Service, and Docker containers.
- Developed a globally installable, infinitely scalable point-of-sale API product used by many Fortune 500 companies to serve customers across the globe. Utilized C#, .NET Core, Azure DevOps pipelines, Kubernetes, Docker, and Helm.
- Created and maintained multiple applications for one of the largest international online dating companies with millions of users using C# with .NET 4.5, Entity Framework, a web API, Ember.js, Python, and Ruby.
- Modeled a dashboard for tracking corporate action events for a multibillion-dollar hedge fund using C#, a web API, and React. Gave presentations to other developers on common usage and patterns in React.
- Applied Node.js 8.9.1, JavaScript, and MongoDB to create invoicing and payment automation for an international travel company to manage customer payments using Google Sheets online, pulling payment information from a custom WordPress site.
Technologies: JavaScript, .NET, .NET Core, Cloud, Serverless, C#, Full-stack, Amazon Web Services (AWS), API Integration, Finance APIs, Finance, Trading, Architecture, Data Processing, Trading Systems, Brokers, Profit & Loss (P&L), Visual Basic for Applications (VBA), Microsoft Excel, Azure, CI/CD Pipelines, GitLab CI/CD, Microservices, Microsoft SQL Server
Software Developer
2007 - 2010
Maverick Capital
- Tasked with shared components and architecture decisions related to all software projects in C# .NET 2.0, 3.0, and 3.5 and technical candidate interviews.
- Implemented a new development process for continuous integration, nightly builds, and automated testing with Team Foundation Server. Guaranteed backward compatibility through testing, MVP architecture, and Rhino Mocks.
- Created back-end systems for hedge fund/financial processes related to new accounts. Areas affected include hedge fund accounting, investor relations, fund allocations, short locates, prime broker/custodian updates, and others.
- Created a custom package for Visual Studio 2008, which enabled all developers to continue using file-sharing-like VSS functionality in TFS through direct integration with Visual Studio and the Team Foundation Server API.
- Integrated custom pricing service with Bloomberg API for real-time and delayed pricing depending on licensing constraints per user.
- Created automated margin calculations report for all custodian agreements. Risk and statistics were based on depending on custodians and identified positions, contributing significantly to the margin to guide custodian location decisions.
- Created custom replacement OMS to handle complex needs for daily trade allocations and other back-office accounting needs, replacing Eze Castle.
Technologies: .NET, SQL, TFS, C#, Full-stack, Amazon Web Services (AWS), API Integration, Finance APIs, Finance, Trading, Architecture, Data Processing, Trading Systems, Brokers, Profit & Loss (P&L), Visual Basic for Applications (VBA), Microsoft Excel, Excel VBA, CI/CD Pipelines, GitLab CI/CD, Microservices, Microsoft SQL Server
Software Developer
2000 - 2007
Systemates. Inc
- Coordinated all technology aspects, including design/development/test/rollout, vendor selection, disaster recovery plans, and hiring of new developers.
- Led international development team to create n-tier applications using C# 2.0 and classic ASP, Web Services, XML, COM+, VB 6.0 and SQL Server 2000/5.
- Solved complex problems, including nationwide multi-team resource scheduling/routing algorithms, custom on-demand applications, and an enterprise-level customized reporting platform.
- Managed coding best practices, release schedules, issue tracking, and feature lists.
Technologies: Active Server Pages (ASP), .NET, SQL, C#, Full-stack, Architecture, Data Processing, Profit & Loss (P&L), Visual Basic for Applications (VBA), Microsoft Excel, Excel VBA, CI/CD Pipelines, Microsoft SQL Server
Software Developer
1998 - 2000
AMX
- Worked with management, customers, and hardware dealers to determine software and hardware requirements for a browser-based AV control system.
- Wrote and debugged control systems utilizing ASP, COM, JavaScript, and XML.
- Worked on client site to install and debug office control systems.
Technologies: Active Server Pages (ASP), SQL, JavaScript, Full-stack, Architecture, Data Processing, Microsoft SQL Server
Experience
Healthcare Data Warehouse
A scalable data warehouse that I created to serve consumer, mobile, and admin interfaces with healthcare data using .NET 6, Azure DevOps, and AWS. The Fast Healthcare Interoperability Resources (FHIR) and EDI x12 data were pulled from multiple insurance providers, stored in Amazon DynamoDB using AWS Fargate/Amazon ECS, and synchronized with Elasticsearch and Amazon OpenSearch for quick searching and retrieval.
Credit Monitoring API for Preventing Identity Theft
A credit monitoring API that I created for B2B consumers to determine if a consumer's identity is for sale on the dark web. I used C#, a web API, AWS, Amazon MQ, Fargate Elastic Container Service, and Docker containers.
Hedge Fund Corporate Action Event Dashboard
A dashboard I created for tracking corporate action events for a multibillion-dollar hedge fund using C#, a web API, and React. I gave presentations to other developers on common usage and patterns in React.
Commerical Real Estate Servicing Application
A global, localized enterprise application that I created and maintained to manage commercial real estate using C# with .NET 4.6, Entity Framework, a web API, Angular, and MVC.
I built the .NET C# Visual Studio Tools for Office (VSTO) Excel workbook add-in for custom financial modeling and reading and saving data directly from Excel 2016 so users could do all of their modeling work in Excel and easily save it in one place.
I built the .NET C# Visual Studio Tools for Office (VSTO) Excel workbook add-in for custom financial modeling and reading and saving data directly from Excel 2016 so users could do all of their modeling work in Excel and easily save it in one place.
Education
2004 - 2006
Master's Degree in Business
University of Texas - Dallas, TX, USA
1994 - 1998
Bachelor's Degree in Computer Science
University of Texas - San Antonio, TX, USA
Skills
Libraries/APIs
Entity Framework, Web API, React
Tools
Slack, Microsoft Excel, GitLab CI/CD, AWS Fargate, Amazon Simple Queue Service (SQS), Visual Studio Tools for Office (VSTO), TFS
Languages
C#.NET, SQL, C#, Visual Basic for Applications (VBA), Excel VBA, JavaScript, TypeScript, Active Server Pages (ASP)
Frameworks
.NET Core, .NET, Angular
Paradigms
Azure DevOps, Microservices, Fast Healthcare Interoperability Resources (FHIR)
Platforms
Windows, Docker, Amazon, Amazon Web Services (AWS), Azure
Storage
Microsoft SQL Server, Amazon DynamoDB, Elasticsearch
Industry Expertise
Trading Systems
Other
Computer Science, .NET 6, APIs, Cloud, Serverless, API Integration, Finance APIs, Finance, Trading, Architecture, Data Processing, Profit & Loss (P&L), CI/CD Pipelines, Excel Add-ins, Full-stack, Brokers, Business, Electronic Data Interchange (EDI)
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